Grinding method of rare earth yttrium-lanthanum composite silicon nitride ceramic

Abstract

The invention discloses a grinding method of rare earth-yttrium-lanthanum composite silicon nitride ceramic. The grinding method comprises the following steps: S1, preparing raw materials required tobe ground in the preparation process of the rare earth yttrium-lanthanum composite silicon nitride ceramic; S2, separately taking out large raw materials which are difficult to grind and small raw materials which are easy to grind in the raw materials, and respectively obtaining large crushed materials and small ground materials a; S3, putting the large crushed material and ground material a in acentrifugal planetary grinding machine together for once more grinding, so as to obtain a grinding material b; and conducting repeated grinding and elutriation to removing floating ash suspended on the water surface, drying, filtering and selecting raw material bodies meeting the proper requirements, and conducting multi-stage repeated grinding for multiple times, so as to finally grind the raw materials into ultrafine raw materials. The consistency of the particle size of powder generated in the grinding process of the raw materials and uniform distribution of multiple particle sizes during mixed grinding are guaranteed, the situation that grinding is not thorough due to high hardness difficulty is thoroughly changed, and the quality of fired and formed products is improved.

Description

technical field [0001] The invention relates to the technical field of ceramic production and grinding, in particular to a grinding method for rare earth yttrium-lanthanum composite silicon nitride ceramics. Background technique [0002] As we all know, ceramics are various products made of natural clay and various natural minerals as the main raw materials through crushing, kneading, molding and calcination. In the past, people called the articles made of clay and fired at high temperature in special kilns ceramics, which is the general name of pottery and porcelain; The utensils made by drying, roasting and other processes can be called ceramics; the utensils fired from clay are called pottery, and the utensils fired from china clay are called porcelain. The development history of ceramics is an important part of the history of Chinese civilization; [0003] Silicon nitride ceramics have excellent high-temperature mechanical properties and are recognized as one of the mo...

AI Technical Summary

Problems solved by technology

[0005] However, in this invention, the raw material is mixed and dried in a planetary ball mill to form a mixed powder, but the method of grinding the raw material is too simple, and the particle size of the powder produced during the grinding process in the raw material cannot be effectively consistent. There are many uneven part...

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