Cake forming method of high-purity alumina powder

A technology of high-purity alumina and molding method, applied in ceramic molding machines, manufacturing tools, etc., can solve the problems of friction pollution, uneven shape, etc., and achieve the effect of increasing the amount of charging, uniform shape and size, and uniform material
CN102581929AActive Publication Date: 2012-07-18晶鑫晶体(内蒙古)科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
晶鑫晶体(内蒙古)科技有限公司
Publication Date
2012-07-18
Patent Text Reader

Abstract

The invention relates to a cake forming method of high-purity alumina powder, belongs to the technical field of chemical machining forming methods, and in particular to an alumina cake forming method. The cake forming method comprises the steps of preforming, vacuum sealing, isostatic cool pressing, high-temperature sintering and the like. According to the invention, a mould made of a PP or tetra fluorine material is adopted, pollution caused by high-purity alumina by the traditional steel mould is avoided, a preformed cake obtained by through low-pressure pressing can ensure that the cake in the later-stage isostatic cool pressing does not easily deform like the original organic mould due to a certain strength, thus the cake with uniform material and enough density is obtained. The cake subjected to the isostatic cool pressing has unchangeable purity after being sintered, and has uniform shape and size and density of commonly reaching 3.0-3.7g / cm<3>. The loading quantity during producing and loading of a downstream manufacturer of sapphire can be effectively increased.
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Description

technical field

[0001] The invention discloses a method for forming a cake of high-purity alumina powder, which relates to the technical field of chemical powder processing and forming methods, in particular to a method for forming an alumina cake. Background technique

[0002] At present, among domestic manufacturers of high-purity alumina cakes, most of them use steel molds for direct molding or cold isostatic pressing with polyurethane or rubber organic molds. The above two methods may cause friction pollution. In alumina, or after cold isostatic pressing, the shape and size are different, which leads to insufficient loading of downstream manufacturers such as sapphire. The invention adopts a step-by-step forming method, and uses PP or PTFE molds to not only ensure that the product is not polluted, but also to make cakes with uniform sizes. Contents of the invention

[0003] The technical problem to be solved by the invention is: frictional pollution or uneven shape ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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