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Method for preparing YAG transparent ceramic by gel casting

A technology for gel injection molding and transparent ceramics, which is applied in the field of preparing YAG transparent ceramics by gel injection molding, and can solve the problems of uneven dispersion and slow gel forming.

Active Publication Date: 2018-02-23
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0008] In order to solve the problems of uneven dispersion and slow gel formation in the prior art, the present invention adopts a stirrer device powered by an electromechanical system, Isobam as a dispersant and a gelling agent, and a catalyst to control the gel rate. Stirring and mixing ceramic slurry under certain conditions to replace the common ball milling method can efficiently solve the heat generation in the ball milling process, and the equipment is simple and the process is controllable, which greatly improves the uniformity and dispersibility of the slurry, and the prepared high-quality The slurry is conducive to obtaining YAG transparent ceramics with good structure uniformity and high transmittance

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  • Method for preparing YAG transparent ceramic by gel casting

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Embodiment Construction

[0025] A method for preparing YAG transparent ceramics by gel injection molding; the method includes the preparation of YAG ceramic slurry, vacuum defoaming, catalyst addition, injection into mold curing, demoulding, drying, debinding, and firing; specifically includes the following step:

[0026] Step 1. Follow Y 3 al 5 o 12 The stoichiometric ratio of the molecular formula weighs Y 2 o 3 Powder, Al 2 o 3 The powder is used as a ceramic powder, and a sintering aid is added to obtain an oxide mixture;

[0027] Step 2: Premix the oxide mixture with balls and a solvent to form a premixed solution, and mix and ball mill for 15 to 24 hours to obtain a mixed slurry;

[0028] Step 3. After the mixed slurry is dried in an oven, calcined in a muffle furnace, and sieved to 100-200 mesh as raw material powder for gel injection molding;

[0029] Step 4, add raw material powder and defoamer to the Isobam solution, and stir with a stirrer at a constant temperature;

[0030] Step 5...

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Abstract

The invention belongs to the technical field of molding and manufacturing processes for transparent ceramic, and specifically relates to a method for preparing YAG transparent ceramic by gel casting.The method uses Isobam as a dispersing agent and a gelating agent, and adopts a system selected from the group consisting of a Ziegler-Natta catalyst system (a Ziegler-Natta catalyst), an ammonium persulfate-tetramethylethylenediamine (APS-TEMED) catalytic system and a 2,2-azo[2-(2-imidazoline-2-yl)propane]hydrochloride (AZIP.2HCl) catalytic system to control the rate of gelation and control the time of gel casting.

Description

technical field [0001] The invention belongs to the technical field of transparent ceramic molding and manufacturing technology, and in particular relates to a method for preparing YAG transparent ceramics by gel injection molding. Background technique [0002] Yttrium aluminum garnet (YAG for short) has a cubic structure, no birefringence effect, low high-temperature creep, excellent optical and mechanical properties, and is widely used in laser matrix gain materials, and can also be used to make high-temperature visible and infrared windows. Compared with YAG single crystal, YAG transparent ceramics can meet the large size and higher doping concentration required for the preparation of high-power lasers, so it has shown good application prospects in replacing YAG single crystal. The preparation of YAG transparent ceramics includes processes such as powder making, molding, sintering and machining. The purpose of the molding process is to obtain a compact green body with hi...

Claims

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Application Information

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IPC IPC(8): C04B35/505C04B35/622C04B35/638C04B35/64
CPCC04B35/505C04B35/622C04B35/638C04B35/64C04B2235/3206C04B2235/3217C04B2235/3418C04B2235/6022C04B2235/6562C04B2235/6567C04B2235/658C04B2235/6581C04B2235/662C04B2235/9653
Inventor 张乐姚庆蒋志刚魏帅高光珍王骋陈浩
Owner XUZHOU NORMAL UNIVERSITY
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