Thermophysical Properties Research Laboratory, Inc.
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TPRL Definitions
Thermal Conductivity determines the quantity of heat which flows in unit time through unit area of a layer of the substance of unit thickness with unit difference of temperature between it's faces.
Thermal Diffusivity measures the change of temperature which would be produced in unit volume of the substance by quantity of heat which flows in unit time through unit area of a layer of the substance of unit thickness with unit difference of temperature between it's faces.
Specific Heat is expressed as a quantity of heat necessary to rise the temperature of unit mass of the substance by one unit.
Thermal Expansion is the tendency of matter to change in volume in response to a change in temperature.
Electrical Resistivity is a measure of how strongly a material opposes the flow of electric current.
Emissivity is the relative ability of a material's surface to emit energy by radiation.
Thermal Gravimetric Analysis is a type of testing performed on samples that determines changes in weight in relation to change in temperature.
Simultaneous Thermal Analysis is the combination of a thermal gravimetric analysis and specific heat measurements.
Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.
Sample Dimensions
Thermal Conductivity determines the quantity of heat which flows in unit time through unit area of a layer of the substance of unit thickness with unit difference of temperature between it's faces.
Thermal Diffusivity measures the change of temperature which would be produced in unit volume of the substance by quantity of heat which flows in unit time through unit area of a layer of the substance of unit thickness with unit difference of temperature between it's faces.
Specific Heat is expressed as a quantity of heat necessary to rise the temperature of unit mass of the substance by one unit.
Thermal Expansion is the tendency of matter to change in volume in response to a change in temperature.
Electrical Resistivity is a measure of how strongly a material opposes the flow of electric current.
Emissivity is the relative ability of a material's surface to emit energy by radiation.
Thermal Gravimetric Analysis is a type of testing performed on samples that determines changes in weight in relation to change in temperature.
Simultaneous Thermal Analysis is the combination of a thermal gravimetric analysis and specific heat measurements.
Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.
Sample Dimensions
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Last updated 12/22/2017