2. Checking the resistance value of elements The slant element end can result in forming a large contact resistance, and elements with internal defects can lead their resistance value to change. Before brazing, the resistance value of elements should be measured by using contact electrode. If there are abnormal components in the element, it will be removed so as to reduce the contact resistance. It can not only improve the consistency of component performance parameters but also the consistency...(more)
In recent years, with the development of thermal electric materials and the marketization of TEC modules, there is a RD upsurge of thermoelectric cooler and thermoelectric conversion devices. Traditional air conditioner and refrigerators apply freon or other compound refrigerant to realize refrigeration. The leakage of freon or other refrigerant lead to pollution of ambient environment and damage to the ozonosphere. Thermo electric cooling technology doesnt need any refrigerant. When its working...(more)
TEC is the abbreviation of thermoelectric cooler, which is a kind of heat pumps. In the international arena, a certain effect has been achieved, in the aspects of improving electric piles manufacturing technologies, by using electric insulation heat conducting layer with metal enamel, copper cuprous oxide electric insulation heat conducting layer, compression electric pile structure and themeasures of deflector surface gold plating. However, with the miniaturization of electric piles, the manufa...(more)
In current market, there is an active demand for high stability, high precision and high heat-resistance NTC thermistor , such as thermistor for measuring exhaust gas for automobile. The working temperature is 400-500C. For liquefied petroleum gas temperature measurement, the temperature is rather high too. Therefore, the need for high temp. thermistor is very urgent. Mn-Co-No series thermistor temperature is about 300C. In order to increase the working temperature, there are some experiments fo...(more)
TEC is the abbreviation of thermoelectric cooler, which is a kind of heat pumps. It has many advantages of no sliding parts, no noise, long service lifetime, good reliability and flexible control. When supplying a power supply, TEC can be rapidly cooling, and when the current reverses, it can also be rapidly heating. Based on the above advantages, TECs have been widely used for mechanical fields and electronic fields. Here are some introductions to cooling characteristics of TECs. TEC consists o...(more)
1.Zero power resistance R T At a specified temperature, resistance value can be measured by measuring power value, which can be negligible comparing with the total error. 2. Rated zero power resistance R25 It is the designed resistance of NTC thermistor and in general, it refers to the measured resistance at the temperature of 25℃ 3. B value B is the thermal index of NTC thermistor, which is defined as the ratio of the natural number difference of zero power resistance under two temperatures an...(more)
NTC is the abbreviation of negative temperature coefficient, which refers to semiconductor materials of devices with large negative temperature coefficients. NTC thermistor is made of manganese, cobalt, nickel and copper and other metal oxide by ceramic manufacturing process. At the regular temperature, the range of NTC thermistor range is 10~1000000 and temperature coefficient is -2%~-6.5%. NTC thermistor has been widely used for temperature measurement, temperature control, temperature compens...(more)
With the development of technology and economy, thermal silicone pads have been widely used for electronic products, auto mechanics, computers, DVD, VCD and some other products, which need filling materials and heat dissipation. Thermal silica is a kind of thermal interface materials based on silica gel, metal oxide and other auxiliary materials. The main function of thermal silicone pads is to transfer heat by the gap. At the same time, it can also play roles of insulation, shock absorption and...(more)
