Production and manufacturing technology of silicon nitride ceramic tiny component

A technology of silicon nitride ceramics and manufacturing technology, which is applied in the field of material science and engineering, can solve problems such as low efficiency, achieve broad application prospects, improve performance indicators, and reduce the size of voids

Inactive Publication Date: 2017-05-10
张海波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the efficiency of the traditional method is too low, it is urgent to invent a new method that can form a higher production efficiency.

Method used

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Embodiment

[0020] A silicon nitride ceramic micro-component production and manufacturing technology proposed by the present invention includes three parts: material design / formulation, molding and green body densification and sintering technology; specifically includes the following steps:

[0021] S1. Prepare materials for production: ceramic main powder, sintering aid, heterogeneous particles, defoaming agent, deionized water, binder, wherein the main ceramic powder is silicon nitride powder containing α phase not less than 92, free silicon Less than 0.2%, iron and calcium impurities are not more than 100ppm, particle size D50 is less than 0.5 microns; sintering aid is one of lanthanum oxide, yttrium oxide, magnesium oxide, aluminum oxide cerium oxide, strontium oxide, aluminum nitride and niobium oxide Or several, the particle size is nanoscale, the total amount is 10%WT; the heterogeneous particles are one or more of titanium nitride, titanium carbide and aluminum nitride, and the dos...

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Abstract

The invention discloses a production and manufacturing technology of a silicon nitride ceramic tiny component. The technology comprises the following steps of preparing materials for production including ceramic main powder, a sintering auxiliary agent, heterogeneous particles, a defoaming agent, deionized water and a bonding agent; mixing the heterogeneous particles into deionized water; adding the defoaming agent to prepare uniform slurry; mixing the ceramic main powder into the uniform slurry; performing drying after the uniform stirring; then, crushing the materials into powder A; adding the bonding agent into the powder A; using a sweet dumpling rolling method for manufacturing a required workpiece; using a plastic bath ceramic biscuit encapsulation method for performing encapsulation; adding the sintering auxiliary agent; using a firstly higher and then lower heat insulation measure for performing sintering treatment on the workpiece. The comprehensive measures of the crystal grain refining, micrometer toughening and nanometer reinforcement, the firstly higher and then lower heat insulation method and the like are used for improving the performance index of the silicon nitride ceramic. The plastic bath encapsulation method is used for solving the encapsulation problem of the biscuit in a complicated shape; the production efficiency of the tiny workpiece encapsulation is greatly improved.

Description

technical field [0001] The invention relates to the field of material science and engineering technology, in particular to a technology for manufacturing silicon nitride ceramic tiny components. Background technique [0002] The production path of advanced ceramics is: (1) batching—(2) mixing and abrasive—(3) granulation—(4) forming—(5) cold isostatic pressing—(6) degumming— --(7) Sintering. Every link in the current process affects the quality of the product. The different components determine the microstructure of the material and thus its various properties; the method and time of the abrasive and the subsequent sintering system determine the grain size of the sintered body and have a great impact on the properties. Cold isostatic pressing determines the density of the biscuit and thus determines the size and distribution of the voids in the sintered body and so on. There is great room for improvement in all current links. [0003] Because of the size, the tiny parts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/622C04B35/626C04B35/64C04B35/634B28B1/00
CPCC04B35/584B28B1/00C04B35/622C04B35/6264C04B35/62695C04B35/63416C04B35/64C04B2235/3206C04B2235/3213C04B2235/3217C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3251C04B2235/3843C04B2235/3865C04B2235/3886C04B2235/661
Inventor 刘玉亭
Owner 张海波
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