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Spray drying process for preparing YAG ceramic powder

A drying process and ceramic powder technology, which is applied in the field of ceramic processing, can solve the problems of cumbersome process and low purity of YAG ceramic particles, and achieve the effects of simplified process flow, shortened preparation time, and reasonable particle size distribution

Active Publication Date: 2018-09-21
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention provides a spray drying process for preparing YAG ceramic powder, aiming to solve the technical problems of low purity and complicated process of YAG ceramic particles produced by the existing preparation process

Method used

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  • Spray drying process for preparing YAG ceramic powder
  • Spray drying process for preparing YAG ceramic powder
  • Spray drying process for preparing YAG ceramic powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The spray drying process that the present invention is used to prepare YAG ceramic powder specifically comprises the following steps:

[0028] S1. Raw material selection: choose alumina hydrosol, the average diameter of solid phase particles is about 60nm, and the solid content is 20wt%; choose yttrium oxide hydrosol, the average diameter of solid phase particles is about 75nm, and the solid content is 25wt%.

[0029] S2. Weighing: Weigh the two raw materials respectively to ensure that their molar ratio is 3:5, so as to determine that Y 3 Al 5 o 12 garnet phase.

[0030] S3. Mix and configure the slurry: After mixing the two colloidal raw materials into a slurry, stir for 45 minutes, then use a small amount of ammonia water and nitric acid to adjust the pH to neutral, about 7.2, and then add deionized water to properly dilute to a solid content of 12wt %, adjust and confirm the pH again.

[0031] S4. Spray drying: The slurry is spray-dried, and the drying parameter...

Embodiment 2

[0034] S1. Raw material selection: choose alumina hydrosol, the average diameter of solid phase particles is about 50nm, and the solid content is 30wt%; choose yttrium oxide hydrosol, the average diameter of solid phase particles is about 60nm, and the solid content is 30wt%.

[0035] S2. Weighing: Weigh the two raw materials respectively to ensure that their molar ratio is 3:5, so as to determine that Y 3 Al 5 o 12 garnet phase.

[0036] S3. Mixing and preparing slurry: After mixing the two colloidal raw materials into a slurry, stir for 60 minutes, then use a small amount of ammonia water and nitric acid to adjust the pH to neutral, about 6.8, and then add deionized water to properly dilute to a solid content of 15wt %, adjust and confirm the pH again.

[0037] S4. Spray drying: The slurry is spray-dried, and the drying parameters are: nozzle diameter 1.0mm, air inlet temperature at the nozzle 200°C, air volume 40m3 / h, and liquid supply volume 10ml / min.

[0038] S5. Calc...

Embodiment 3

[0040] S1. Raw material selection: choose alumina hydrosol, the average diameter of solid phase particles is about 90nm, and the solid content is 15wt%; choose yttrium oxide hydrosol, the average diameter of solid phase particles is about 110nm, and the solid content is 15wt%.

[0041] S2. Weighing: Weigh the two raw materials respectively to ensure that their molar ratio is 3:5, so as to determine that Y 3 Al 5 o 12 garnet phase.

[0042] S3. Mix and configure the slurry: After mixing the two colloidal raw materials into a slurry, stir for 20 minutes, then use a small amount of ammonia water and nitric acid to adjust the pH to neutral, about 7.5, and then add deionized water to properly dilute to a solid content of 10wt %, adjust and confirm the pH again.

[0043] S4. Spray drying: The slurry is spray-dried, and the drying parameters are: nozzle diameter 0.5mm, air inlet temperature at the nozzle 180°C, air volume 25m3 / h, and liquid supply volume 20ml / min.

[0044] S5. Calc...

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Abstract

The invention discloses a spray drying process for preparing YAG ceramic powder. The spray drying process is characterized by comprising the following steps of selection of materials, wherein aluminahydrosol and yttria hydrosol are selected for use; weighing, wherein the alumina hydrosol and the yttria hydrosol are weighed according to the molar ratio of 3:5; mixing and preparation of slurry, wherein the alumina hydrosol and the yttria hydrosol are mixed and stirred for 20-60 min, pH is adjusted to neutral with ammonia water and nitric acid, the pH value is controlled to be 6.8-7.5, deionizedwater is added for dilution until the solid content is 10-15 wt%, the pH value is adjusted to be 6.8-7.5, and the slurry is prepared; spray drying, wherein spray drying is conducted on the slurry toobtain powder; calcination, wherein the powder obtained by spray drying is calcined. Only the pH of the sol slurry needs to be adjusted so that spray drying can be carried out, the process flow is greatly simplified, and the spray drying process is very suitable for (semi) industrial production process of YAG ceramic particles.

Description

technical field [0001] The invention relates to the technical field of ceramic processing, in particular to a spray drying process for preparing YAG ceramic powder. Background technique [0002] At present, solid-state lasers are more and more widely used in military, medical, industrial, scientific research and other fields. As the key to solid-state lasers, laser materials are the core and foundation of laser technology development. The traditional laser host materials are single crystal and glass, but the preparation cycle of single crystal is long, and it is difficult to achieve large size and high concentration doping. These limitations limit the further development of laser technology to a certain extent. Compared with single crystal and glass, YAG(Y 3 Al 5 o 12 , yttrium aluminum garnet) transparent ceramics have attracted great attention due to their short preparation period, easy realization of uniform (gradient) and high-concentration doping, easy realization o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/505C04B35/626
CPCC04B35/44C04B35/505C04B35/62655C04B2235/3222C04B2235/3225
Inventor 张乐贲玥魏帅周天元高光珍王骋陈浩
Owner XUZHOU NORMAL UNIVERSITY
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