NTC temperature sensitive element semiconductor and preparation method thereof

Abstract

The invention relates to a method for producing a semiconductor of a NTC temperature sensitive element. The method comprises the following steps: mixing manganese oxide, magnesium oxide and lanthanum oxide, uniformly mixing the raw materials, adding water, grinding the raw materials for 40-60 hours, dehydrating the raw materials and drying the raw materials, adding an adhesive after dehydration is carried out, uniformly stirring the raw materials to form powder; compacting the powder in a die for molding, roasting the obtained embryo sheets at the temperature of 1150-1250 DEG C to obtain ceramic chips; coating two surfaces of the ceramic chips with a silver paste to produce an electrode, and welding a lead wire to obtain the NTC temperature sensitive element semiconductor. The method is used for adjusting the proportion of components in a composition of the NTC temperature sensitive element semiconductor to prolong the service life of the product, and can solve the problems of low stability and poor reliability of the NTC temperature sensitive element.

Description

technical field [0001] The invention belongs to the field of thermistors, and in particular relates to an NTC thermosensitive element semiconductor and a preparation method thereof. Background technique [0002] NTC is the abbreviation of NegativeTemperatureCoefficient, which means a negative temperature coefficient, and generally refers to semiconductor materials or components with a large negative temperature coefficient. Manufactured by electronic ceramic technology. These metal oxide materials all have semiconductor properties, because they are completely similar to semiconductor materials such as germanium and silicon in terms of conductivity. When the temperature is low, the number of carriers (electrons and holes) in these oxide materials is small, so its resistance value is high; as the temperature increases, the number of carriers increases, so the resistance value decreases. The resistance value of NTC thermistor varies from 100 to 1,000,000 ohms at room temper...

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Problems solved by technology

[0004] In order to solve the above problems, the object of the present invention is to provide a kind of NTC thermosensitive element semiconductor and preparation method thereof, adjust the proportioning of each component in the composition that is used for NTC thermosensitive element semiconductor and prolong the service life of resistance, gained NTC The secondary firing of thermal element semiconductors in two different process stages eliminates the internal imbalance defects caused by high temperature and machining stress during the manufacturing process of NTC thermal element semiconductors, accelerates the stabilization process and improves The service life of the semiconductor of the NTC thermal element is long, and at the same time, a dense sintered molten layer is formed on the surface of the ceramic sheet, which effectively eliminates the open pores, so the stability of the NTC thermal element can be significantly improved, and the problem of the NTC thermal element is solved. Problems of low stability and poor reliability

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