Principle of Specific Heat Capacity
Specific heat capacity, commonly referred to as heat capacity, is the thermal capacity per unit mass of a substance, defined as the internal energy absorbed or released when a unit mass of an object changes its temperature by one unit. The common unit is J/(g·℃), calculated by the formula: Cp = dQp/dT·m.
Testing Method
Thermal analysis (currently the most precise method)
Instrument Technical Parameters
- Testing temperature range: -70℃ to 250℃
- Precision: 0.1%
Sample Submission Requirements and Precautions
- Solid or liquid samples: 20–100 mg in a plastic centrifuge tube.
- Samples must be free of low-boiling solvents (such as methanol, ethanol, water, etc.), as this will cause test errors.
- Samples must not undergo chemical changes such as pyrolysis within the testing temperature range.
Testing Cases
Reference Standards
- GB/T 30741-2014 Determination of Specific Heat Capacity of Thermal Insulation Materials - Differential Scanning Calorimetry
- YY/T 0870.2-2019 Thermal Analysis of Medical Devices - Part 2: Determination of Specific Heat Capacity by Differential Scanning Calorimetry
