Laser pulse thermal conductivity meter

DRX-II-JG20 typeLaser pulse thermal conductivity meterIntroduction:

The instrument uses a laser beam to irradiate the sample and an infrared detector to measure the increase in temperature on the back of the sample, in order to calculate the thermal diffusion coefficient of the sample. It has the characteristics of being fast and convenient, and can measure the specific heat of the sample to further calculate the thermal conductivity. It is widely used in the testing of metals and alloys, diamonds, ceramics, graphite and carbon fibers, filled plastics, polymer materials, etc. It can also be used to test the thermal conductivity of liquids, thin films, solid electrical insulation materials, granular materials, powder materials, coal, in accordance with GJB 1201.1-91, ASTMD 1461 solid materials, thermal conductive resins, thermal conductive glass fibers, etc.

The DRX-II-JG series laser thermal conductivity tester developed by our company is a precision measuring instrument for thermal diffusivity, thermal conductivity, and specific heat that adopts modular design. It has a 20 digit automatic sampling system and can be used to measure temperatures ranging from -1252800 ℃ by replacing the furnace body. Multiple different sample racks can be selected, suitable for solids, liquids, melts, and slag. The compact design separates hardware and electronic components, making it suitable for nuclear applications when installed in a casing. According to different application environments, there are multiple types of machine shell designs available for users to choose from.

Laser pulse thermal conductivity meterMeasurement principle:

Place the sample in the furnace automatic sampler and heat the furnace to the programmed temperature. At this temperature, the bottom of the sample is irradiated with an energy pulse (xenon lamp), which generates a uniform temperature rise process at the top of the sample. The thermal diffusion coefficient can be calculated based on the relationship between temperature rise and time by measuring the temperature rise on the surface of the sample using a high-speed infrared detector.

Main technical parameters of the instrument:

1. Temperature range can be selected: -100~room temperature, RT-500 ℃, 1000 ℃, 1600 ℃;

2. Heating and cooling rate: 0.1-30 ℃/min; (can be set arbitrarily);

3. Sample testing range: Square size not less than 10 × 10mm, circular size less than φ 20, thickness 1-10mm; (special specifications can also be customized);

4. Sample size: equipped with a 20 digit automatic sampler;

5. Testing environment: Customizable vacuum, with a vacuum degree of -0.1MPa (standard requirement) and 10-3Pa (special customization fees are charged separately); Test atmosphere: inert, oxidizing, reducing (optional);

6. Range of thermal diffusion coefficient: 0.01-1000mm2/s;

7. Thermal conductivity test range: 0.1-2000W/m · K;

8. Pulse source: Nd: YAG Laser;

9. Pulse energy: 15J/time;

10. Adjustable pulse energy: Yes;

11. Adjustable pulse interval: software setting;

12. Sensor: Insb/MCT, air-cooled;

13. Test sample types: solid block, low viscosity liquid, high viscosity liquid, solid powder (with a set of fixtures), viscous semi-solid, elastic solid, thin film, etc. can all be adapted;

14. Sample holder: graphite, SiC，Al2O3， Metal (other requirements can be customized); Equipped with an automatic sampler;

15. Can achieve two modes of vacuum measurement and protective atmosphere measurement (atmosphere: inert, oxidizing, reducing, static, dynamic);

16. Multi layer contact thermal resistance analysis can be carried out, and parameters such as thermal resistance and thermal diffusion rate can be calculated. The specific heat can be calculated using a standard sample with known specific heat and through comparative methods;

17. Can be connected to a computer for fully automatic control, with a Chinese operating interface and automatic printing of test reports;

18. Multiple mathematical model fitting, accurate pulse width correction and pulse energy integration, heat loss correction, built-in database;

19: Cp repeatability: ± 3% (for most materials);

20: Repeatability of thermal diffusion coefficient: ± 2 (for most materials);

21: Integrated electronic equipment with a data acquisition rate of 2MHz;

22: Host computer interface: USB and dedicated portable interface, can be matched with network port to achieve data interconnection and remote testing;

23: Dedicated analysis and testing software, supporting WIDOWS10 64 bit operating system and domestic Kirin system.

Instrument configuration:

One test host, one set of sampler, one set of testing software, and one set of Lenovo brand computer.