Preparation method of transparent ceramic

A technology for transparent ceramics and powders, applied in the field of ceramic materials, can solve the problems of generating chloride ions and nitrate ions, the process does not have environmental protection requirements, and increasing production costs, achieving low cost of raw materials, shortening sintering time, and improving sintering. effect of the process

Inactive Publication Date: 2019-08-30
深圳市丁鼎陶瓷科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the chemical co-precipitation process involves soluble precursors (chloride or nitrate, etc.), pollutants such as chloride ions and nitrate ions will be generated during the preparation process, making the process not environmentally friendly.
At the same time, the entire preparation process and cleaning process need to use a large amount of high-purity water, making the process complicated and lengthy, and additionally increasing the production cost

Method used

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  • Preparation method of transparent ceramic
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preparation example Construction

[0026] The present invention will be further described below in conjunction with more specific embodiments, but it should be pointed out that the transparent ceramic and its preparation method of the present invention are not limited to this specific form or steps. Those skilled in the art can obviously understand that the following explanations can be directly applied to other similar compounds or preparation methods not specified herein even without any adjustment or modification.

[0027] Such as figure 1 Shown, the preparation method of transparent ceramic of the present invention comprises the following steps:

[0028] S1: Put the oxide powder and sintering aid in a ball milling tank at a certain weight percentage, add an appropriate amount of deionized water or absolute ethanol at the same time, and use a planetary ball mill to continuously ball mill at room temperature for 2-12 hours;

[0029] Among them, the oxide powder can be Y 2 o 3 、Al 2 o 3 、Sc 2 o 3 、Lu 2...

Embodiment 1

[0043] S1: To 10kg of yttrium aluminum garnet (Y 3 al 5 o 12 ) Add 0.05kg of LiF and 0.05kg of SiO to the powder 2 As a sintering aid, put the resulting mixture into a nylon ball mill jar, and put alumina balls and deionized water at the same time; make the weight ratio of the aforementioned powder mixture to the alumina balls 1:20, and the added deionized water The amount of ionic water is just enough to submerge the powder and balls; the powder is ball milled with a planetary ball mill, the speed of the ball mill is 200 rpm, and the ball milling time is 12 hours.

[0044] S2: After the ball milling, transfer the ball-milled slurry to a glass vessel of appropriate size, and place it in a drying oven for drying treatment. The drying temperature is 90° C. and the drying time is 2 hours.

[0045] S3: The dried powder has agglomeration and needs to be crushed; use the corresponding crushing method according to the degree of agglomeration; the crushed powder is then passed thro...

Embodiment 2

[0052] S1: To 1kg yttrium aluminum garnet (Y 3 al 5 o 12 ) in the powder, add 0.01kg of LiF and 0.01kg of MgO as sintering aids, put the obtained mixture into a nylon ball mill jar, put alumina balls and deionized water into it simultaneously; make the powder mixture and alumina mill The weight ratio of the balls is 1:15, and the amount of deionized water added is just enough to submerge the powder and the balls; the powder is milled with a planetary ball mill, the speed of the ball mill is 180 rpm, and the milling time is 10 hours.

[0053] S2: After the ball milling, transfer the ball-milled slurry to a glass petri dish of appropriate size, and place it in a drying oven for drying treatment. The drying temperature is 90° C. and the drying time is 4 hours.

[0054] S3: The dried powder has agglomeration and needs to be crushed; use the corresponding crushing method according to the degree of agglomeration; the crushed powder is then passed through a 200-400 mesh sieve.

[...

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Abstract

The invention discloses a preparation method of a transparent ceramic. The preparation method includes the following steps: to-be-obtained transparent ceramic powder and a sintering assistant are fully mixed through a planetary ball milling process; after ball milling is performed for a given time, drying is performed; the dried powder is pulverized and screened, and then sequentially subjected toprepressing, cold isostatic pressing, high temperature sintering and grinding/polishing steps; a transparent ceramic sample is obtained through preparation. Through the preparation method of the invention, the compound sintering assistant is adopted to effectively promote the sintering process of the ceramic; the sintering temperature is reduced; the transparency of the transparent ceramic is increased.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a method for preparing transparent ceramics. Background technique [0002] Traditional applications of transparent ceramics include solid-state lasers, infrared windows, armored glass, etc. New applications have gradually emerged for transparent ceramics this year, such as solid-state lighting, mobile phone screens, and decorations. With the continuous expansion of its application range and the increase of people's demand for it, it is increasingly required to be low-cost, easy to operate, and mass-produced. [0003] Theoretically speaking, the matrix material of transparent ceramics must first be a crystal structure with higher symmetry, and the cubic crystal structure is the best, and the tetragonal crystal structure and hexagonal crystal structure are also possible, because they have no or only very weak crystal structure. Double refraction problem. In addition, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/50C04B35/505C04B35/622C04B35/64
CPCC04B35/44C04B35/50C04B35/505C04B35/622C04B35/64C04B2235/3206C04B2235/3217C04B2235/3244C04B2235/3418C04B2235/445C04B2235/656C04B2235/6567C04B2235/6582C04B2235/6583C04B2235/9653
Inventor 孔令兵丁涛
Owner 深圳市丁鼎陶瓷科技有限公司
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