Detail Thermal Conductivity Meter BXT-DRS
Conductivity Meter
Transient Plane Heat Source Method Thermal Conductivity Meter BXT-DRS
The BXT-DRS rapid thermal conductivity tester is a thermal conductivity tester developed using transient planar heat source technology (TPS), which can be used to test the thermal conductivity of various materials. The transient plane heat source method is one of the medium-sized methods for studying the heat conduction performance, which brings the measurement technology to a whole new level. The ability to quickly and accurately measure thermal conductivity when researching materials provides great convenience for enterprise quality monitoring, material production, and laboratory research. The instrument is easy to operate, the method is simple and easy to understand, and it will not cause damage to the tested sample.
Working principle
Transient Planar Heat Source Technology (TPS) is a new method for measuring thermal conductivity, developed by Professor Silas Gustafsson of Chalmer University of Technology in Sweden on the basis of the hot wire method. The principle of measuring the thermophysical properties of materials is based on the transient temperature response generated by a step-heated disc-shaped heat source in an infinite medium. A flat probe is made of thermal resistance material, which serves as a heat source and temperature sensor at the same time.
The thermal resistance coefficient of the alloy is a linear relationship between temperature and resistance, that is, the heat loss can be known by understanding the change of resistance, which reflects the thermal conductivity of the sample. The probe of this method is a
continuous double helix structure sheet formed after etching treatment of a conductive alloy. The outer layer is a double-layer insulating protective layer with a very thin thickness. It makes the probe have a certain mechanical strength and keeps the distance between the sample and the sample. The electrical insulation.
During the test, the probe is placed in the middle of the sample for testing. When the current passes through the probe, a certain temperature rise is generated, and the generated heat is
simultaneously diffused to the samples on both sides of the probe. The speed of thermal diffusion depends on the thermal conductivity of the material. By recording the temperature and the response time of the probe, the thermal conductivity can be directly obtained from
the mathematical model.
