High-Temperature Specific Heat Capacity Tester for Solid Materials: Specifications and Applications

This article introduces a high-temperature specific heat capacity tester for solid materials and outlines its key specifications and application scope. Main technical specifications: - Temperature range: ambient to 1400 ℃. - Temperature control accuracy: ±0.3 K per 30 minutes (dependent on setpoint and configuration). - Minimum temperature resolution: 0.01 K. - Heating method: resistance wire (or molybdenum wire). - Control: intelligent PID regulation with program control. - Data acquisition: full-process computer-based data logging. - Vacuum capability: calorimeter < 2 × 10^-3 Pa; heater < 5 Pa (subject to sample requirements); typical system vacuum: −0.1 MPa. - Software environment: Windows XP, Chinese user interface. - Sample dimensions: diameter 11 mm, height 30 mm; powder samples use a standard specimen cup. Working principle and system composition: The instrument employs the mixing (drop) method combined with modern computer-based measurement to automatically determine the specific heat capacity of solids at different temperatures. The system typically comprises a vertical tube resistance furnace (resistance wire heating up to about 1000 ℃; molybdenum wire heating up to about 1700 ℃; above 1700 ℃ a graphite tube furnace is used), a thermostat, temperature controller, high-precision thermometer, calorimeter, and a computer data acquisition system. Test procedure: A prepared specimen is first heated in the tube furnace to the target experimental temperature. It is then dropped into the calorimeter, while the computer acquisition system records the transient temperature responses of both the specimen and the calorimeter. The specific heat capacity of the material is calculated from these measurements. Application notes: For samples that oxidize readily at high temperatures, a vacuum system is required to ensure measurement integrity and to prevent sample degradation.

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