Manufacturing method of black zirconia ceramics

A technology of black zirconia and zirconia ceramics, applied in the field of ceramic sintering, can solve the problems of poor performance of sintered products, complicated quality control, long production cycle, etc., and achieve the effect of short process, simple process and reduced chance of impurity pollution

Inactive Publication Date: 2005-01-19
钟伟 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing black zirconia ceramics are sintered by adding metal oxides to the zirconia powder. The disadvantages are: first, the process is long, the production cycle is long, and there is one more step of adding pigment before the blank is made. process
Second, the quality control is complicated. The amount of pigment added and the fluctuation of sintering temperature are sensitive to the color reaction of the sintered product. The process of adding pigment will cause the slag of the sintered product due to the poor mixing effect and the introduction of inevitable impurities. , cracking and color fluctuations, etc. Third, the performance of sintered products is poor. After testing, a workpiece made by adding pigments to the powder, then hot-pressed to form a billet, and then sintered has a density of only 5.3g / cm2 after sintering. 3 , due to too brittle hardness test can not be successful, the process of the workpiece from 1.5m 2 It shattered when it fell freely onto the concrete floor from a height of

Method used

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Embodiment Construction

[0006] The present invention will be further described below in conjunction with embodiment.

[0007] The invention mainly includes: mainly including zirconia ceramic powder, characterized in that: the zirconia ceramic powder is processed into a workpiece blank, and the formed white zirconia workpiece blank is dewaxed, degreased or bisque-fired at low temperature without a protective atmosphere, and then The pretreated zirconia biscuit workpiece is sintered at high temperature under vacuum conditions, or filled with argon or hydrogen in a vacuumed furnace, and sintered at high temperature under protective gas. The boat for placing the workpiece during sintering should use graphite Materials or lay a layer of graphite paper on the graphite boat, place a graphite plate or cover a layer of graphite paper on the placed workpiece, keep the temperature during high-temperature sintering between 1550°C and 1650°C, and keep it for more than 1 hour. The vacuum degree during the sinterin...

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Abstract

The invention discloses a manufacturing method of black zirconia ceramics which comprises, processing zirconium oxide ceramic powder into work piece blank, subjecting the obtained zirconium oxide to de-waxing, degreasing or low-temperature biscuit firing treatment with no protective atmosphere, then subjecting the pretreated zirconium oxide plain blank work piece to high-sintering under vacuum condition, or filling argon, hydrogen into the evacuated furnace, and conducting high-sintering in protective atmosphere.

Description

Technical field: [0001] The invention relates to the technical field of ceramic sintering, in particular to a method for manufacturing black zirconia ceramics. Background technique: [0002] The existing black zirconia ceramics are sintered by adding metal oxides to the zirconia powder. The disadvantages are: first, the process is long, the production cycle is long, and there is one more step of adding pigment before the blank is made. process. Second, the quality control is complicated. The amount of pigment added and the fluctuation of sintering temperature are sensitive to the color reaction of the sintered product. The process of adding pigment will cause the slag of the sintered product due to the poor mixing effect and the introduction of inevitable impurities. , cracking and color fluctuations, etc. Third, the performance of sintered products is poor. After testing, a workpiece made by adding pigments to the powder, then hot-pressed to form a billet, and then sintere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/64
Inventor 李宏书钟伟
Owner 钟伟
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