Method for in-situ measurement of material thermoelectric properties in diamond anvil cell

Abstract

The present invention discloses a method for in-situ measurement of material thermoelectric properties in a diamond anvil cell (DAC). The method comprises the steps of: the step 1, manufacturing of heat-isolating and insulated composite pad; the step 2, deposition of a W-Ta thin film thermocouple on a surface of the DAC; the step 3, performing Seebeck coefficient measurement of a measured sample in a high voltage; and the step 4, performing conductivity measurement of the sample in the high voltage. Though the DAC is employed in the prior art to allow people to observe structures of substancesand change of physical properties in an ultrahigh voltage environment, lots of semiconductor materials can generate reduction of energy bands and increasing of a conductivity in a high voltage, and therefore, a superexcellent experiment means is provided for improving the thermoelectric properties of the semiconductor materials. In the prior art, there is no a set of developed measurement methodfor measurement of thermoelectric properties of samples in the DAC, so that the technical problems cannot be solved that the thermoelectric properties of the materials cannot be simply and conveniently tested in the prior art.

Description

Technical field: [0001] The invention belongs to the technical field of in-situ measurement of physical quantities under high-pressure conditions, and in particular relates to a method for in-situ measurement of thermoelectric properties of materials in a diamond counter-anvil. Background technique: [0002] With the increasing depletion of fossil energy, energy issues have become the focus of attention of countries all over the world. Scientists from all over the world are working on finding efficient and pollution-free new energy conversion and utilization methods. Therefore, since the 1990s, the research on energy conversion materials (thermoelectric materials) has become a research hotspot in material science. Thermoelectric materials, also known as thermoelectric materials, are a new type of functional materials with mutual conversion between thermal effect and electric effect. Using the property of thermoelectric materials, thermal energy and electrical energy can be ...

AI Technical Summary

Problems solved by technology

However, in the existing experimental technology, there is no mature measurement method for measuring the thermoelectric properties of samples in DAC, resulting in technical problems such as the inability to perform simple and convenient tests on the thermoelectric properties of materials.

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