Sintering aid for preparing silicon nitride ceramics, application of sintering aid and preparation method of silicon nitride ceramics

Abstract

The invention relates to the technical field of silicon nitride ceramics, and in particular, relates to a sintering aid for preparing silicon nitride ceramics, an application of the sintering aid and a preparation method of the silicon nitride ceramics. The invention provides the sintering aid for preparing the silicon nitride ceramics. The sintering aid comprises a component A, a component B and a component C; the particle size of the sintering aid is less than or equal to 100 nm; the mass ratio of the component A to the component B to the component C is (1-5):(1-10):(1-10); the component A comprises titanium dioxide; the component B comprises boric oxide, magnesium oxide or calcium oxide; and the component C comprises a rare earth metal oxide. The sintering aid can effectively improve the mechanical property of the silicon nitride ceramics.

Description

technical field

[0001] The invention relates to the technical field of silicon nitride ceramics, in particular to a sintering aid for preparing silicon nitride ceramics and its application, and a method for preparing silicon nitride ceramics. Background technique

[0002] Silicon nitride ceramic material has the properties of high strength, low density, strong wear resistance, good corrosion resistance, high thermal shock resistance, self-lubrication and good electrical insulation. It is the preferred material for the production of various structural ceramic parts. At the same time, it also has great development potential, and has a wide range of applications in the fields of aerospace, machinery and chemical industry.

[0003] However, with the development of modern technology, the performance requirements for corresponding materials are also increasing. For example, silicon nitride materials used in integrated circuit IC substrates, ultrasonic probes and other devices requ...