Thermoelectric performance tester is a device specially used to measure the change of physical parameters of materials under high temperature conditions. The invention has the advantages of small volume, light weight, convenient operation, etc.
Thermoelectric performance test principle:
(1) The output power of a party or device is obtained by measuring the open circuit voltage and short circuit current of the party or device.
(2) Use a suitable size thermoelectric flowmeter to measure the heat flow through the thermoelectric side or device. The working principle of the thermoelectric flowmeter is: When the thermoelectric cooling plate is energized, one end of the thermoelectric cooling plate cools and the other end heats up, and the cooling end faces the cold end and the heating end of the thermoelectric material and passes into the thermostatic cooling water (constant temperature), and the heat flow through the thermoelectric heat flow meter under different temperature gradients is obtained by using the calibrated operating temperature and cooling capacity equation of the high and low temperature end.
(3) The conversion efficiency is obtained by relatively large output power and heat flow through.
Applications of thermoelectric performance testing:
1. Bismuth telluride, lead telluride, germanium telluride, cobaltite, electron crystal-phonon glass, nanoscale superlattices, functional gradient, Half-Heusler thermoelectric materials π-pair and device thermoelectric conversion efficiency test Used to test, analyze and study the conversion efficiency of two identical or different N-type or P-type thermoelectric materials π-pair.
2. Semiconductor materials, metal materials and other thermoelectric materials (Bi2Te3, PbTe, Cu, nickel, tungsten and other metals, Te, Bi2Te3, ZrNiSn, ZnAgSb, NiMoSb, SnTe, FeNbSb, CuGaTe2, GeTe, Ag1-xCuS, etc.) Cu2ZnSnSe4, etc.) Seebeck coefficient and conductivity, resistivity.
3. The V-1 device can automatically detect whether the contact between the sample and the lead is normal.