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Physical process of transition between basic states of matter
In physics, chemistry and biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another
Phase_transition
Topics referred to by the same term
Phase change may refer to: Phase transition, the transformation from one thermodynamic state to another. Phase-change memory, a type of random-access
Phase_change
Difference between phase angles
A phase change sometimes occurs when a wave is reflected, specifically from a medium with faster wave speed to the boundary of a medium with slower wave
Reflection_phase_change
Substance with high latent heat of melting or solidifying
A phase-change material (PCM) is a substance which releases/absorbs sufficient energy at phase transition to provide useful heat or cooling. Generally
Phase-change_material
Elapsed fraction of a cycle of a periodic function
In physics and mathematics, the phase (symbol φ or ϕ) of a wave or other periodic function F {\displaystyle F} of some real variable t {\displaystyle
Phase_(waves)
Measure of change in amplitude and phase of a wave
sinusoidal electromagnetic wave is a measure of the change undergone by the amplitude and phase of the wave as it propagates in a given direction. The
Propagation_constant
Novel computer memory type
Phase-change memory (also known as PCM, PCME, PRAM, PCRAM, OUM (ovonic unified memory) and C-RAM or CRAM (chalcogenide RAM)) is a type of non-volatile
Phase-change_memory
Transition in plants
Vegetative phase change is the juvenile-to-adult transition in plants. This transition is distinct from the reproductive transition and is most prolonged
Vegetative_phase_change
Chart used to show conditions at which physical phases of a substance occur
the fixed pattern of the solid phase and enter the liquid phase. A similar concept applies to liquid–gas phase changes. Water is an exception which has
Phase_diagram
System that transfers heat from one space to another
Therefore, they are regarded as a key technology for limiting climate change by phasing out fossil fuels. They are also a crucial element of systems which
Heat_pump
Rewritable optical disc standard
Phase-change Dual (or Phase-change Disc, commonly abbreviated as PD) is a rewritable optical disc format and storage standard introduced by Matsushita
Phase-change_Dual
The phase-change incubator is a low-cost, low-maintenance incubator that tests for microorganisms in water supplies. It uses small balls containing a chemical
Phase-change_incubator
Biogeochemical cycle for movement of water on Earth
transfers between different phases. The energy released or absorbed during a phase change can result in temperature changes. Heat is absorbed as water
Water_cycle
Fluid used to maximize thermal contact
Thermal pastes that undergo phase transition at working temperatures have been made. Instead of the regular meaning of phase-change material (a material that
Thermal_paste
Process of removing waste heat from a computer
(two phase cooling) to cool the CPU. Phase-change cooling is an extremely effective way to cool the processor. A vapor compression phase-change cooler
Computer_cooling
Technologies to store thermal energy
and water and insulated at the top, as well as eutectic solutions and phase-change materials. Other sources of thermal energy for storage include heat or
Thermal_energy_storage
Type of data encoding
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency carrier wave. The
Phase-shift_keying
Description of constant-temperature solid phase changes
one phase to another at constant temperature. It can specifically describe the kinetics of crystallisation, can be applied generally to other changes of
Avrami_equation
Method of reusing thermal energy in a building
containing a fluid which undergoes a constant phase change to transfer heat. The fluid within the pipes changes from a fluid to a gas in the evaporator section
Heat_recovery_ventilation
Computer memory that does not lose its contents after being turned off
other companies are developing. Phase-change memory stores data in chalcogenide glass, which can reversibly change the phase between the amorphous and the
Non-volatile_memory
Change of minerals in pre-existing rocks without melting into liquid magma
garnet are resistant to mylonitization. Kyanite Andalusite Sillimanite Phase change metamorphism is the creating of a new mineral with the same chemical
Metamorphism
Optical microscopy technique
in light passing through a transparent specimen to brightness changes in the image. Phase shifts themselves are invisible, but become visible when shown
Phase-contrast_microscopy
Thermodynamic phase transition energy
first-order phase transition, like melting or condensation. Latent heat can be understood as hidden energy which is supplied or extracted to change the state
Latent_heat
Topics referred to by the same term
Look up Phase, phase, or phases in Wiktionary, the free dictionary. Phase or phases may refer to: State of matter, or phase, one of the distinct forms
Phase
Type of artificial neural network
which phase-change material has the ability to cumulatively respond to multiple input signals. An electrical alteration of the resistance of the phase change
Physical_neural_network
Shape of the Moon's sunlit portion as viewed from Earth
A lunar phase or Moon phase is the apparent shape of the Moon's day and night phases of the lunar day as viewed from afar. Because the Moon is tidally
Lunar_phase
Germanium-antimony-tellurium material
or GST) is a phase-change material from the group of chalcogenide glasses used in rewritable optical discs and phase-change memory applications
GeSbTe
Physical quantity of hot and cold
magnitude of the change. For example, if the change is an increase in temperature at constant volume, with no phase change and no chemical change, then the temperature
Temperature
International football competition
League. The season will begin on 7 July 2026 with qualifiers and the league phase will start on 8 September 2026. The final will be held on 5 June 2027 at
2026–27_UEFA_Champions_League
Material put between components to enhance thermal coupling
"Full Metal TIMs". Power Systems Design Europe. "Phase Change". Laird Technologies. "Phase Change Metal TIMs | Thermal Interface Materials". indiumcorporation
Thermal_interface_material
2014 studio album by Beck
release, Morning Phase is a "companion piece" to Beck's 2002 album Sea Change. Almost every credited musician who recorded parts for Sea Change returned to
Morning_Phase
Concept in mathematics
conditions. At the interface between the phases (in the classical problem) the temperature is set to the phase change temperature. To close the mathematical
Stefan_problem
Graph of the frequency response of a control system
(usually in decibels) of the frequency response, and a Bode phase plot, expressing the phase shift. As originally conceived by Hendrik Wade Bode in the
Bode_plot
Type of reciprocating heat engine
be of any composition and the system may be single-phase (liquid only or gas only) or dual-phase (liquid/gas). Working fluids for external combustion
External_combustion_engine
Type of computer memory
development is phase-change RAM, or PRAM. PRAM is based on the same storage mechanism as writable CDs and DVDs, but reads them based on their changes in electrical
Non-volatile random-access memory
Non-volatile_random-access_memory
Human-caused changes to climate on Earth
Protocol, an international agreement to phase out production of ozone-depleting gases, has had benefits for climate change mitigation. Several ozone-depleting
Climate_change
Type of energy transfer
heat is measured by changes in a body of known properties, for example, temperature rise, change in volume or length, or phase change, such as melting of
Heat
Physical property of matter
atomic scales. Then the change in temperature will depend on the particular path that the system followed through its phase space between the initial
Heat_capacity
Substance used to reduce or regulate the temperature of a system
water reactors. The phase change effect can be intentionally used, or can be detrimental. Phase-change materials use the other phase transition between
Coolant
Enthalpy change when a substance melts
room for any associated change in volume by displacing its environment against ambient pressure. The temperature at which the phase transition occurs is
Enthalpy_of_fusion
Resolution-improving photomask
attenuated phase shift masks. A phase-shift mask relies on the fact that light passing through a transparent media will undergo a phase change as a function
Phase-shift_mask
System that converts heat or thermal energy to mechanical work
of gases according to the gas laws or the properties associated with phase changes between gas and liquid states. Earth's atmosphere and hydrosphere—Earth's
Heat_engine
Optical interference pattern of concentric rings
boundary with no phase change. The reflected light undergoing internal reflection (about 4% of the total) also has no phase change. The light that is
Newton's_rings
Thermodynamic process in which no mass or heat is exchanged with surroundings
adiabatic and energy is added in the form of heat (Q > 0), and there is no phase change, then the temperature of the system will rise. If the system has such
Adiabatic_process
Discontinued computer memory type
began around 2012. Intel and Micron had developed other non-volatile phase-change memory (PCM) technologies previously; Mark Durcan of Micron said 3D XPoint
3D_XPoint
Transfer of heat out of an object
is removal of heat, usually resulting in a lower temperature and/or phase change. Temperature lowering achieved by any other means may also be called
Cooling
Soft colorless solid derived from petroleum, coal or shale oil
gram per kelvin) and a heat of fusion of 200–220 J⋅g−1. Paraffin wax phase-change cooling coupled with retractable radiators was used to cool the electronics
Paraffin_wax
Chemical compound with formula Na2SO4
E514. The high heat-storage capacity in the phase change from solid to liquid, and the advantageous phase change temperature of 32 °C (90 °F) makes this material
Sodium_sulfate
Chemical compound
or at high pH [VO4]4−. VO2 has a phase transition at 68 °C (341 K). Electrical resistivity, opacity, etc, can change by several orders of magnitude. Owing
Vanadium(IV)_oxide
Phase transition from gas to solid
Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process.
Deposition_(phase_transition)
Ratio of the thermal resistances of a body's interior to its surface
micro-encapsulated phase-change slurries is an application where the Biot number is useful. For the dispersed phase of the micro-encapsulated phase-change slurry
Biot_number
Thermal engineering discipline concerning transfer of heat in physical systems
conduction, thermal convection, thermal radiation, transfer of energy by phase changes, and evaporative cooling. Engineers also consider the transfer of mass
Heat_transfer
Refrigeration process
vapor-compression refrigeration system (VCRS), in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used
Vapor-compression refrigeration
Vapor-compression_refrigeration
Flow of gas and liquid in the same conduit
heated pipes and it changes to steam as it moves through the pipe. The design of boilers requires a detailed understanding of two-phase flow heat-transfer
Two-phase_flow
Technology using sunlight for heat
Disadvantages include low phase-change enthalpy, low thermal conductivity, and flammability. Inorganics are advantageous with greater phase-change enthalpy, but exhibit
Solar_thermal_energy
Rocket engine operation method
is used to cool the engine's combustion chamber, picking up heat and changing phase. The now heated and gaseous fuel then powers the turbine that drives
Expander_cycle
Deterioration of tin objects at low temperature
metals or semimetals soluble in tin's solid phase, e.g. antimony or bismuth, which prevent the phase change. Impurities (e.g. Al, Zn, etc.) lower the transformation
Tin_pest
Phases of Earth as seen from the Moon
Earth phase is the shape of the directly sunlit portion of Earth as viewed from the Moon (or elsewhere extraterrestrially). From the Moon, Earth phases gradually
Earth_phase
Thermic response to pressure change
Barocaloric solids undergo solid-to-solid phase change. One barocaloric material processes heat without a phase change: natural rubber. Barocaloric effects
Barocaloric_material
Equipment used to transfer heat between fluids
that has a change of phase. This is usually a solid to liquid phase due to the small volume difference between these states. This change of phase effectively
Heat_exchanger
Determining heat transfer in a system by measuring its other properties
changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints. Calorimetry is performed
Calorimetry
Pad used for warming of parts of the body in order to manage pain
ground-up spices such as cloves and nutmeg, or even dried rose petals. Phase change materials can be used for heating pads intended to operate at a fixed
Heating_pad
Term in wireless communications
and phase change imposed by the channel on the signal changes. The coherence time is a measure of the minimum time required for the magnitude change or
Fading
Sweeping audio effect
the phase. The amount of change in phase depends on the frequency. When signals from the two paths are mixed, the frequencies that are out of phase will
Phaser_(effect)
Matter which can change its physical properties in a programmable fashion
examples of programmable matter. Shape-changing and locomotion of solid objects are possible with solid-liquid phase change pumping. This approach allows deforming
Programmable_matter
Type of optical device
variations in the instantaneous phase of a carrier wave. The phase of a carrier signal is modulated to follow the changing voltage level (amplitude) of modulation
Electro-optic_modulator
Solid material with highly ordered microscopic structure
solids are crystals. For example, when liquid water starts freezing, the phase change begins with small ice crystals that grow until they fuse, forming a polycrystalline
Crystal
Component primarily utilized for making cushions or mattresses
containing the gel which, as a phase-change material, achieved the desired temperature stabilization or cooling effect by changing from a solid to a liquid
Memory_foam
Pressurized gas or liquid in a heat engine
(temperature change) into mechanical energy (or vice versa) by phase change and/or heat of compression and expansion. Examples using phase change include water↔steam
Working_fluid
Interpretation of entropy as the change in arrangement of a system's particles
early developments, the typical example of entropy change ΔS is that associated with phase change. In solids, for example, which are typically ordered
Entropy_(order_and_disorder)
Phase of the estrous or menstrual cycle
The follicular phase, also known as the preovulatory phase or proliferative phase, is the phase of the estrous cycle (or, in primates for example, the
Follicular_phase
Latter part of the menstrual cycle
person, but from cycle to cycle within one person. The luteal phase is characterized by changes to hormone levels, such as an increase in progesterone and
Luteal_phase
Complex number representing a particular sine wave
engineering, a phasor (a portmanteau of phase vector) is a complex number representing a sinusoidal function whose amplitude A and initial phase θ are time-invariant
Phasor
Engine combustion process
assumed to have constant pressure during the initial part of the combustion phase ( V 2 {\displaystyle V_{2}} to V 3 {\displaystyle V_{3}} in the diagram
Diesel_cycle
Desalination technique powered by solar energy
are categorized into single-phase processes (membrane based) and phase change processes (non-membrane based). Single-phase indirect solar desalination
Solar_desalination
2025–2027 group of superhero films and TV series
Phase Six of the Marvel Cinematic Universe (MCU) is a group of American superhero films and television series produced by Marvel Studios based on characters
Marvel Cinematic Universe: Phase Six
Marvel_Cinematic_Universe:_Phase_Six
Optical disc designed for the storage of digital video
GB. It utilizes a design based on the Magneto-optical disc, but uses Phase Change technology combined with a blue violet laser. A UDO/UDO2 disc that can
Ultra_Density_Optical
Thermal interface material
often termed a "phase change" by industrial sources, though this use must be differentiated with the regular meaning of phase-change material (a material
Thermally_conductive_pad
Model for thermodynamic phase transitions
connection with the isotherms of the van der Waals equation to describe its phase change, in particular its vapor pressure, the liquid and vapor states that are
Maxwell_construction
American inventor and engineer
coincidental." Smith's designs include the screenless hammer mill and the phase-change incubator, and she is also involved with the application of the Malian
Amy_B._Smith
Mixture of an insoluble substance microscopically dispersed throughout another substance
larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). Some colloids are translucent
Colloid
Mechanism of spontaneous phase separation
whereas a nucleated phase change begins at a discrete number of points. Spinodal decomposition occurs when a homogenous phase becomes thermodynamically
Spinodal_decomposition
Device for measuring a physical quantity
calorimeter, phase change calorimeter for example an ice calorimeter or any other calorimeter observing a phase change or using a gauged phase change for heat
List_of_measuring_instruments
Four-stage model of physiological responses to sexual stimulation
changes that take place during the plateau stage as the orgasmic platform. Orgasm is experienced by both males and females, ending the plateau phase of
Human_sexual_response_cycle
Shift of atomic positions in a crystal structure
occurs, leading to a modification in the crystal structure during a phase change. These movements are small, usually less than their interatomic distances
Diffusionless_transformation
Optical disk technology
suitable hardware, be re-written up to 100,000 times. The CD-RW is based on phase change technology, with a degree of reflection at 15–25%, compared to 40–70%
CD-RW
Change of state of matter from a gas phase into a liquid phase
Condensation is the change of the state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers
Condensation
Branch of physics
(spatial soliton) that does not change during propagation due to a balance between dispersion and the Kerr effect (e.g. self-phase modulation for temporal and
Nonlinear_optics
2023–2025 group of superhero films and TV series
Disney+. The 2023 Hollywood labor disputes impacted the phase, leading to various schedule changes. It began with the film Ant-Man and the Wasp: Quantumania
Marvel Cinematic Universe: Phase Five
Marvel_Cinematic_Universe:_Phase_Five
Low-pressure voids formed in liquids
temperature, and further heat is supplied to allow the liquid to sufficiently phase change into a gas. Cavitation inception occurs when the local pressure falls
Cavitation
Alloy used in nuclear weapon pits
importance. Under 4 mol.% gallium the pressure-induced phase change is irreversible. However, the phase change is useful during the operation of a nuclear weapon
Plutonium–gallium_alloy
Branch of thermodynamics
chemical reactions and/or phase changes such as melting and boiling. A reaction may release or absorb energy, and a phase change may do the same. Thermochemistry
Thermochemistry
Opposition to current by inductance or capacitance
the same applied voltage. Reactance is used to compute amplitude and phase changes of sinusoidal alternating current going through a circuit element. Like
Electrical_reactance
Variant of DVD designed with random access in mind
memory unit such as a magnetic tape drive. DVD-RAM works by means of phase change technology which was chosen instead of magneto-optical technology (an
DVD-RAM
Measurement method using interference of waves
two paths, then the phase difference is diagnostic of anything that changes the phase along the paths. This could be a physical change in the path length
Interferometry
Passage of a system from an initial to a final state of thermodynamic equilibrium
process is a process in which the thermodynamic state of a system is changed. A change in a system is defined by a passage from an initial to a final state
Thermodynamic_process
Distance over which a wave's shape repeats
it is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings. Wavelength
Wavelength
State of matter
liquid's boiling point, all of the heat energy is used to cause the phase change from a liquid to a gas, without an accompanying increase in temperature
Liquid
Attachment of electronic components
eutectic temperature at which the particular solder alloy undergoes a phase change to a liquid or molten state. At this specific temperature range, the
Reflow_soldering
State of thermodynamic systems where no net flow of matter or energy occurs
models Non-random two-liquid model (NRTL model) - Phase equilibrium calculations UNIQUAC model - Phase equilibrium calculations Time crystal Topics in control
Thermodynamic_equilibrium
PHASE CHANGE
PHASE CHANGE
Girl/Female
Hindu
Art, Phases of Moon
Male
English
Middle English surname (of Norman French origin) transferred to forename use, CHASE means "hunter."Â
Surname or Lastname
English
English : metonymic occupational name for a huntsman, or rather a nickname for an exceptionally skilled huntsman, from Middle English chase ‘hunt’ (Old French chasse, from chasser ‘to hunt’, Latin captare).Southern French : topographic name for someone who lived in or by a house, probably the occupier of the most distinguished house in the village, from a southern derivative of Latin casa ‘hut’, ‘cottage’, ‘cabin’.Thomas Chase came to MA from Chesham, Buckinghamshire, England, in the 1640s, and had many prominent descendants. Samuel Chase, born in Somerset Co., MD, in 1741, was one of the first members of the U.S. Supreme Court; Philander Chase, born in Cornish, NH, in 1741 was a prominent Episcopal clergyman, and his nephew Salmon Portland Chase (1808–73), also born in Cornish, was governor of OH, a U.S. senator, and secretary of the U.S. Treasury during the Civil War.
Boy/Male
Hindu, Indian
Gods Prayer; Sanskrit Phrase
Surname or Lastname
English
English : from Middle English pese ‘pea’, hence a metonymic occupational name for a grower or seller of peas, or a nickname for a small and insignificant person. The word was originally a collective singular (Old English peose, pise, from Latin pisa) from which the modern English vocabulary word pea is derived by folk etymology, the singular having been taken as a plural.Robert and John Pease came from Great Baddow, Essex, England, to Salem, MA, in 1634. In 1644 Robert died, leaving a son (also called Robert) who was apprenticed as a weaver in Salem. By 1646 John Pease was living on Martha’s Vineyard.
Girl/Female
Indian, Telugu
A Phase of Life; Childhood
Male
French
French form of Latin Stephanus, STÉPHANE means "crown."
Girl/Female
Hindu
Art, Phases of Moon
Girl/Female
Tamil
Art, Phases of Moon
Girl/Female
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Telugu
Phase; Time of Day
Girl/Female
Hindu
Phases of Moon
Surname or Lastname
German
German : nickname for a swift runner or a timorous person, from Middle High German, Middle Low German hase ‘hare’.Jewish (Ashkenazic) : ornamental name from German Hase ‘hare’.English : from a Middle English nickname, Hase, from Old English hÄs ‘harsh, raucous, or hoarse voice’.Japanese : usually written with characters meaning ‘long valley’; habitational name from a place in Yamato (now Nara prefecture). Listed in the Shinsen shÅjiroku. Some bearers are descended from the Taira clan; they are found mainly in eastern Japan. Also pronounced Nagaya and Nagatani; the original pronunciation was Hatsuse, meaning ‘beginning of the strait’.
Boy/Male
English American
Huntsman.
Boy/Male
German
Chase; Hunt
Girl/Female
Tamil
Phase, Time of day
Girl/Female
Indian, Telugu
Phrase of Music
Girl/Female
Tamil
Kala Devi | கலா தேவீ
Art, Phases of Moon
Kala Devi | கலா தேவீ
Boy/Male
American, Australian, British, Chinese, Christian, English, French
Huntsman; Hunter
Girl/Female
Tamil
Shashikala | ஷஷிகலா
Phases of Moon
Shashikala | ஷஷிகலா
Girl/Female
Indian
Phases of Quran
PHASE CHANGE
PHASE CHANGE
Boy/Male
Tamil
Manyata | மாநà¯à®¯à®¤à®¾
Principles, Assumption
Girl/Female
Gaelic
Girl; lass.
Boy/Male
Arabic, Indian, Muslim, Sindhi
Doer; Work Man; Worker; Effective
Girl/Female
Muslim
Sun of the world
Girl/Female
British, English
Girl
Boy/Male
Arabic, Muslim
Covered
Girl/Female
Muslim/Islamic
Beautiful
Boy/Male
Muslim
Bravery, Valor
Girl/Female
Latin
Graced with God's bounty.
Boy/Male
Australian, Finnish
Royal; Kindly; King
PHASE CHANGE
PHASE CHANGE
PHASE CHANGE
PHASE CHANGE
PHASE CHANGE
n.
Pulse; pease.
n.
A kind of joint by which an overlap joint is changed to a flush joint, by means of a gradually deepening rabbet, as at the ends of clinker-built boats.
n.
Any appearance or aspect of an object of mental apprehension or view; as, the problem has many phases.
v. t.
To chase.
n.
A brief expression, sometimes a single word, but usually two or more words forming an expression by themselves, or being a portion of a sentence; as, an adverbial phrase.
v. t.
A passing from one phase to another; as, a change of the moon.
a.
Resembling prase.
v. i.
To give chase; to hunt; as, to chase around after a doctor.
n.
A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form of enlightened disk; as, the phases of the moon or planets. See Illust. under Moon.
imp. & p. p.
of Phrase
pl.
of Phase
pl.
of Pease
v. i.
To group notes into phrases; as, he phrases well. See Phrase, n., 4.
a.
Without a phase, or visible form.
n.
The liberty or franchise of having a chase; free chase.
n.
See Phase.
p. pr. & vb. n.
of Phrase
v. t.
To follow as if to catch; to pursue; to compel to move on; to drive by following; to cause to fly; -- often with away or off; as, to chase the hens away.
n.
That which is exhibited to the eye; the appearance which anything manifests, especially any one among different and varying appearances of the same object.
n.
Any one point or portion in a recurring series of changes, as in the changes of motion of one of the particles constituting a wave or vibration; one portion of a series of such changes, in distinction from a contrasted portion, as the portion on one side of a position of equilibrium, in contrast with that on the opposite side.