Preparation method of zirconium oxide and aluminum oxide tape casting green body co-sintered sheet layer

Abstract

The invention discloses a preparation method of a zirconium oxide and aluminum oxide tape casting green body co-sintered sheet layer. According to the preparation method, enstatite (the main componentis Mg2[Si2O6]Fe2[Si2O6]) is selected; the thermal expansion coefficient of enstatite is 13.5 ppm / k, the addition amount of enstatite is 42%, the addition amount of nano Al2O3 is 58%, the thermal expansion coefficient of enstatite can be consistent with the that of zirconium oxide, and meanwhile, the insulation property, the sintering characteristic, the strength and the compatibility of enstatitecan be matched. The problems that the insulating property is reduced and the sintering property, strength and compatibility are not matched due to co-sintering at present are solved.

Description

technical field [0001] The invention relates to the technical field of co-sintered sheets of tape-cast green bodies, in particular to a preparation method of co-sintered sheets of tape-cast green bodies of zirconia and alumina. Background technique [0002] At present, the chip oxygen sensors for automobiles are all made of zirconia substrates, because various functional units are printed on them and then laminated, and the heating unit is required to be insulated from the signal unit to prevent the temperature from rising. The conduction of the substrate causes the heating signal to interfere with the electrochemical signal. The heating unit needs to be insulated, which is usually carried out by printing the aluminum oxide insulating layer on the upper and lower sides of the heating unit. However, the pins are outside and the heating circuit is inside. They are usually connected through via holes. The insulation treatment of via holes is very difficult. The hole is insulat...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing co-sintered sheets of zirconia and alumina tape-cast green bodies, which solves the problems of decreased insulation caused by co-sintering and mismatch of sintering performance, strength and compatibility at the same time. question