Thermal conductivity tester laser flash method

DRX-II-JGThermal conductivity tester laser flash methodIntroduction:

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 can simultaneously measure 3-6 samples and can be adjusted from -1252800 ℃ by changing 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.

Thermal conductivity tester laser flash methodMeasurement 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: room temperature, RT-500 ℃, 1200 ℃;

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

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

4Pulse source:Nd:YAG Laser

5Pulse energy:15J/time

6Adjustable pulse energy: Yes

7Adjustable pulse interval: software setting

8Sensor:Insb/MCT, air cooling

9Conduct non-contact temperature rise signal testing on the sample surface using an infrared detector;

10Sample testing range: Square not less than10 × 10mm, circular with a diameter of 12-20 (special specifications of 20 are optional), thickness of 0.1-10mm; try to choose samples with a thickness of 3mm;

11Test sample types: solid block, low viscosity liquid, high viscosity liquid, viscous semi-solid, elastic solid, film, etc. can all be adapted, and solid powder requires special customization;

12Maximum number of samples that can be placed at a time:3Number of samples per test:1 sample; Equipped with an automatic sampler

*13It can achieve two modes of vacuum measurement and protective atmosphere measurement (atmosphere: inert, oxidation, reduction, static, dynamic), and is equipped with normal temperature and pressure air environment as standard;

14Multi layer contact thermal resistance analysis can be conducted, 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 comparison method;

15Can be connected to a computer for implementationFully automatic control,Chinese operationInterface, automatic printing of test reports；

16、measureTest accuracy:±4%，Repeatability:±3% (Most materials)

17、Repeatability of thermal diffusion coefficient:±2 %(Most materials)

18、Integrated electronic equipment with a data acquisition rate of up to2MHz

*19、Upper computer interface:USBAnd a dedicated portable interface that can be connected to a network port for data interconnection and remote testing;

20、Specialized analysis and testing software, supportingWIDOWS10 64Operating system and domestic Kirin system.

Instrument configuration:

One test host (including high-temperature furnace), one set of sampler, one set of testing software, and one set of Lenovo brand computer.