Laser Flash Thermal Conductivity Meter

Introduction to DRX-II-JG Laser Pulse Thermal Conductivity Meter: The instrument uses a laser beam to irradiate the sample and an infrared detector to measure the temperature rise on the sample's back surface, calculating the thermal diffusivity. It features speed and convenience, can measure specific heat, and further calculate thermal conductivity. It is widely used for testing metals and alloys, diamonds, ceramics, graphite and carbon fibers, filled plastics, polymers, liquids, films, solid electrical insulating materials, granular materials, powder materials, and coal thermal conductivity, meeting GJB 1201.1-91 and ASTMD 1461 standards for solid materials, thermal conductive resins, and thermal conductive glass fibers. Our company developed the DRX-II-JG series laser thermal conductivity testers with modular design, precisely measuring thermal diffusivity, thermal conductivity, and specific heat. It can simultaneously measure 3-6 samples and allows temperature range selection from -125 to 2800℃ by changing the furnace. Various sample holders are available, suitable for solids, liquids, melts, and slags. The compact design separates hardware and electronic components, and with an external cover, it can adapt to nuclear applications. Multiple housing designs are available for different application environments. Measurement principle of Laser Pulse Thermal Conductivity Meter: The sample is placed in the furnace's automatic sampler and heated to a programmed temperature. At this temperature, the sample bottom is irradiated by an energy pulse (xenon lamp), producing a uniform temperature rise on the sample top. A high-speed infrared detector measures the surface temperature rise, and thermal diffusivity is calculated based on the temperature-time relationship. Main technical parameters of the instrument:

1. Temperature range options: room temperature, RT-500℃, 1000℃, 1600℃;
2. Heating and cooling rate: 0.1 to 30℃/min (adjustable);
3. Sample test size: square not less than 10×10mm, circular less than φ20, thickness 1 to 10mm (special sizes customizable);
4. Number of samples measurable: 1, 3, or 6 (automatic sampler optional);
5. Testing environment: customizable vacuum with vacuum degree -0.1Mpa (standard), 10-3Pa (special customization extra cost); test atmospheres: inert, oxidizing, reducing (optional);
6. Thermal diffusivity measurement range: 0.01 to 1000 mm²/s;
7. Thermal conductivity measurement range: 0.1 to 2000 W/m·K;
8. Pulse source: Nd:YAG Laser;
9. Pulse energy: 15J per pulse;
10. Adjustable pulse energy: yes;
11. Adjustable pulse interval: software set;
12. Sensor: InSb/MCT, air-cooled;
13. Sample types: solid blocks, low-viscosity liquids, high-viscosity liquids, solid powders (with fixture set), viscous semi-solids, elastic solids, films, all adaptable;
14. Sample holders: graphite, SiC, Al2O3, metal (customizable); equipped with automatic sampler;
15. Supports vacuum measurement and protective atmosphere measurement modes (atmospheres: inert, oxidizing, reducing, static, dynamic);
16. Can perform multilayer contact thermal resistance analysis and calculate thermal resistance, thermal diffusivity, etc. Using known specific heat standard samples, specific heat can be calculated by comparison;
17. Connectable to computer for full automatic control, Chinese interface, automatic test report printing;
18. Multiple mathematical model fitting, precise pulse width correction and pulse energy integration, heat loss correction, built-in database;
19. Cp repeatability: ±3% (most materials);
20. Thermal diffusivity repeatability: ±2% (most materials);
21. Integrated electronic equipment, data acquisition rate up to 2MHz;
22. Upper computer interface: USB and dedicated portable interface, optional network interface for data interconnection and remote testing;
23. Dedicated analysis software supporting Windows 10 64-bit operating system. Instrument configuration: one test host (including high-temperature furnace), one sampler set, one test software set, one Lenovo brand computer set.