温度传感器敏感材料（Temperature sensor sensitive material）.doc

温度传感器敏感材料（Temperature sensor sensitive material） Temperature sensor sensitive material Temperature is one of the seven basic physical quantities of an international unit. Temperature measurement plays an important role in physics. It is also very important in national economy, national defense construction and scientific research, and even in peoples life. Therefore, it has been widely used. Noble metals, especially platinum and their alloys, have excellent oxidation resistance. High temperature thermoelectric potential and single function, the thermoelectric properties is stable, with high temperature coefficient of resistance, the relationship between resistance and temperature is approximately linear, is especially important to measure the temperature of material and temperature sensitive materials, has been widely used in the precise measurement of temperature and temperature and high temperature is used as reference point. There are two main types of noble metal temperature measurement materials: thermocouple materials and platinum resistance thermometer materials. Noble metal thermocouple material In 1821, Z. J. Seeback found that thermoelectric effect, about A and B two different metal wires into the loop, the two ends of the temperature remained different, then the circuit generates current, there is a temperature difference caused by electromotive force. This effect is called Seeback or Seeback. The effect of temperature effect is the basic principle of thermocouple. Existing thermoelectric VAB = W.AR - OT in closed circuit, in which.OT is this difference; W a= (WA--W) Seeback (W and W coefficient. Absolute thermal electromotive force for metals A and B. W. Determine the basic performance of the thermocouple materials. As this side of the thermocouple material requirements are as large as possible WM, that use W and W . The material with a great difference is made of two poles and requires that the relationship between W Hu and temperature Ding be linear as