Method for preparing yttrium oxide transparent ceramic through co-precipitation

A technology of transparent ceramics and yttrium oxide, which is applied in the production field of transparent ceramics, can solve problems such as unstable batches, poor repeatability, and unstable performance of transparent ceramics, and achieve high yield, simple operation, and controllable experimental results Effect

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

[0005] In order to effectively solve the problems of batch instability and poor repeatability caused by the uncertain stirring speed during the preparation of nano-yttrium oxide powder by the coprecipitation method, a method for preparing yttrium oxide transparent ceramics by coprecipitation was invented.
This method can effectively solve th

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  • Method for preparing yttrium oxide transparent ceramic through co-precipitation
  • Method for preparing yttrium oxide transparent ceramic through co-precipitation
  • Method for preparing yttrium oxide transparent ceramic through co-precipitation

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Embodiment Construction

[0020] Firstly, the yttrium nitrate solution and the composite precipitant solution of ammonia water and ammonium bicarbonate are configured; then, the precipitant solution is pumped into the yttrium nitrate solution, and the agitator is stirred during the co-precipitation process. When the pH value at the end of the reaction is between 8 and 9, stop pumping and stirring; after the solution is allowed to stand for aging, deionization and ethanol are sequentially added for suction filtration, drying, and calcination to obtain nanometer Y 2 o 3 Powder. then Y 2 o 3 After dry pressing and cold isostatic pressing of the powder, bisque firing, vacuum sintering, annealing, and grinding and polishing are carried out to obtain Y 2 o 3 Transparent ceramics, the main content of which is that during the co-precipitation reaction, the stirring rate of the reaction solution is strictly and precisely controlled, and the specific steps are as follows:

[0021] 1) Co-precipitation reacti...

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Abstract

The present invention belongs to the technical field of production of transparent ceramics, and relates to a method for preparing an yttrium oxide transparent ceramic through co-precipitation. According to the present invention, the yttrium oxide transparent ceramic is prepared through the co-precipitation method, wherein the stirring speed of the reaction solution is controlled at 330-430 r/min at the precipitation reaction stage, such that the concentration distribution in the solution is uniform so as to prevent the sever power agglomeration, the non-uniform particle size distribution, theinstable transmission of the ceramic and other current status caused by the excessive local circulation and layering phenomenon, wherein the unreasonable stirring speed can cause the excessive local circulation and layering phenomenon.

Description

technical field [0001] The invention relates to a method for preparing yttrium oxide transparent ceramics by co-precipitation, and belongs to the production technical field of transparent ceramics preparation. Background technique [0002] Yttrium oxide (Y 2 o 3 ) transparent ceramic material is a high-performance ceramic material. It has excellent properties such as heat resistance, corrosion resistance, high melting point (2430 ° C), high dielectric constant (12-20), and belongs to the cubic crystal system, has no birefringence phenomenon, and has high paramagnetism that ordinary ceramics do not have. And fluorescent properties, etc., is a high-temperature infrared material and electronic material with excellent performance. It can be widely used as optical components, such as high-temperature optical windows, laser infrared windows, infrared generator shells, etc. After adding Nd, Yb, Ce, Ho and other rare earth elements, Y 2 o 3 Transparent ceramics can also be use...

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Application Information

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IPC IPC(8): C04B35/505C04B35/622C04B35/63
CPCC04B35/505C04B35/622C04B35/6303
Inventor 张乐李全彬蒋志刚王忠英周天元高光珍王骋陈浩
Owner XUZHOU NORMAL UNIVERSITY
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