Technical Specifications and Applications of a High-Temperature Specific Heat Capacity Tester for Solid Materials

Technical specifications include a temperature range from room temperature to 1,400 °C, temperature-control accuracy of ±0.3 K per 30 minutes, and a minimum temperature resolution of 0.01 K. Heating uses resistance wire or molybdenum wire, with intelligent PID and program control, and the complete process uses computer data acquisition.

The stated vacuum limits are less than 2 × 10⁻³ Pa for the calorimeter and less than 5 Pa for the heater. The software runs in Windows XP with a Chinese user interface. Specimens are 11 mm in diameter and 30 mm high; powder specimens use a standard specimen cup.

The tester uses the method of mixtures with computer-based measurement to determine the specific heat capacity of solid materials at different temperatures. Its system comprises a vertical tubular resistance furnace, thermostat, temperature controller, high-precision thermometer, calorimeter, and computer test system.

During testing, the specimen is heated in the tubular furnace to the test temperature and then transferred to the calorimeter. The computer system records the temperature changes of the specimen and calorimeter to determine specific heat capacity. High-temperature, oxidation-sensitive specimens require the specified vacuum configuration.