thermal hysteresis definition of thermal hysteresis in the Free Online Encyclopedia.

thermal hysteresis [′thər·məl ‚his·tə′rē·səs]

(thermodynamics)

A phenomenon sometimes observed in the behavior of a temperature-dependent property of a body; it is said to occur if the behavior of such a property is different when the body is heated through a given temperature range from when it is cooled through the same temperature range.

Thermal hysteresis

A phenomenon in which a physical quantity depends not only on the temperature but also on the preceding thermal history. It is usual to compare the behavior of the physical quantity while heating and the behavior while cooling through the same temperature range. The illustration shows the thermal hysteresis which has been observed in the behavior of the dielectric constant of single crystals of barium titanate. On heating, the dielectric constant was observed to follow the path ABCD, and on cooling the path DCEFG. See Ferroelectrics

Plot of dielectric constant versus temperature for a single crystal of barium titanate

Perhaps the most common example of thermal hysteresis involves a phase change such as solidification from the liquid phase. In many cases these liquids can be dramatically supercooled. Elaborate precautions to eliminate impurities and outside disturbances can be instrumental in supercooling 60 to 80°C. On raising the temperature after freezing, however, the system follows a completely different path, with melting coming at the prescribed temperature for the phase change. See Crystal, Phase transitions

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No references found	Recent MEMS (micro-electro-mechanical systems) resonator breakthroughs, such as improved long-term frequency stability and thermal hysteresis, have convinced some design engineers and management teams that the new technology's day has come. MEMS GENERATION TAKES ITS PLACE BESIDE QUARTZ by Electro Manufacturing 05, the thermal hysteresis becomes quite small while the magnetocaloric effect remains approximately unchanged (Wada et al. Recent developments in room temperature Active Magnetic Regenerative ... by Engelbrecht, Kurt L.; Nellis, Greg F.; Klein, Sanford A.; Zimm, Carl B. / HVAC & R Research The only use of the thermal gradient for driving the martensitic transition in SMAs is documented in the work of Salzbrenner and Cohen [7], who studied the thermal hysteresis of Cu-Al-Ni single crystals. Propagation of an austenite-martensite interface in a thermal ... by Seiner, Hanus; Landa, Michal; Sedlak, Petr / Proceedings of the Estonian Academy of Science Physics/Mathematics	thermal electromotive force thermal emissivity thermal endurance thermal energy thermal environment Thermal Equator thermal equilibrium Thermal Erosion thermal excitation Thermal Expansion Thermal Expansion and Pressure Coefficients thermal expansion coefficient thermal exposure thermal farad thermal finish thermal flame safeguard thermal flasher thermal flux thermal gasoline thermal gradient thermal grease Thermal Head thermal henry thermal high thermal horsepower thermal hysteresis thermal imagery thermal inductance thermal instability thermal instrument thermal insulating cement thermal insulation thermal insulation board thermal inversion thermal ionization thermal jet thermal limit thermal load thermal low thermal magnon thermal mapper thermal mass thermal metamorphism thermal microphone Thermal Motion thermal movement Thermal Neutron thermal neutron analysis thermal noise thermal noise generator thermal ohm	Thermal Fusion Thermal Fusion Thermal gasification Thermal gasification Thermal Gasoil Unit thermal gasoline Thermal generating plant Thermal generating station Thermal generation Thermal Generation Interest Group Thermal Gradient Thermal Gradient Thermal Gradient Capillary Electrophoresis Thermal Gradient Gel Electrophoresis Thermal Gradient Utilization Cycle Thermal Gradient Zone Melting Thermal grease Thermal Halide Cycle Thermal Hall effect Thermal Head Thermal Helium Desorption Spectroscopy thermal henry thermal high thermal horsepower Thermal Hydraulic Integrated Network Thermal Hydraulic Out-of-Reactor Safety Thermal Hydraulic Test Facility thermal hysteresis Thermal Image Processing System Thermal imager Thermal imager Thermal imager thermal imagery thermal imagery thermal imagery Thermal Imagery Airborne Laser Designator System Thermal Imagery Recognition Trainer Thermal Imaging Thermal Imaging Thermal Imaging Thermal Imaging Airborne Laser Designator Thermal Imaging camera Thermal Imaging Common Module Thermal Imaging Inspection Station Thermal Imaging Module Thermal Imaging Navigation Set Thermal Imaging Sensor Integrated Thermal Imaging Sensor System Thermal Imaging System Thermal Imaging System Common Modules Thermal Imaging Tracking Aid System Thermal Impulse Printer Thermal Impulse Printer System Thermal Induced Voltage Alteration thermal inductance Thermal inertia Thermal Infrared Thermal Infrared Imaging Spectrometer

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Recent MEMS (micro-electro-mechanical systems) resonator breakthroughs, such as improved long-term frequency stability and thermal hysteresis, have convinced some design engineers and management teams that the new technology's day has come.

MEMS GENERATION TAKES ITS PLACE BESIDE QUARTZ by Electro Manufacturing

05, the thermal hysteresis becomes quite small while the magnetocaloric effect remains approximately unchanged (Wada et al.

Recent developments in room temperature Active Magnetic Regenerative ... by Engelbrecht, Kurt L.; Nellis, Greg F.; Klein, Sanford A.; Zimm, Carl B. / HVAC & R Research

The only use of the thermal gradient for driving the martensitic transition in SMAs is documented in the work of Salzbrenner and Cohen [7], who studied the thermal hysteresis of Cu-Al-Ni single crystals.

Propagation of an austenite-martensite interface in a thermal ... by Seiner, Hanus; Landa, Michal; Sedlak, Petr / Proceedings of the Estonian Academy of Science Physics/Mathematics

thermal electromotive force

Thermal Expansion and Pressure Coefficients