Process of preparing zirconia and yttria with Y-doped cubic zirconia powder

A phase zirconia, powder-based technology, applied in the field of preparation of zirconium and yttrium oxides, can solve the problems of mutual interference between zirconium and yttrium, and the troublesome determination of hafnium in zirconium.

Inactive Publication Date: 2007-06-27
王必庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of detection alone, in addition to the interference between zirconium and yttrium, the determination of hafnium in zirconium is also a lot of trouble

Method used

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  • Process of preparing zirconia and yttria with Y-doped cubic zirconia powder
  • Process of preparing zirconia and yttria with Y-doped cubic zirconia powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Mix 1Kg yttrium-zirconium powder with 0.8Kg caustic soda and 0.1Kg borax and fuse in an iron crucible at 350°C for 30 minutes, take out the melt and cool it to 150°C, put it in a magnesium refractory sagger and react in a high-temperature furnace at 800°C After 1 hour, 1.8Kg of sintered material was obtained. The sintered material was crushed to below 150 mesh. The liquid-solid ratio was 5 and water was added for leaching for 25 minutes. The soft water was washed twice with a liquid-solid ratio of 3, and the precipitate was soaked with 2 liters of hydrochloric acid with a concentration of 1mol / L. 30 minutes, rinse with 0.4mol / L hydrochloric acid to Na:Zr≤1:80, and the hydrochloric acid of 25% by weight reacts with it, and reaction temperature is 95 ℃, acidity 2.5mol / L, concentrates to Baume degree B'= 32°, add concentrated hydrochloric acid to control the acidity at 5.5mol / L, cool and crystallize, rinse with 6mol / L hydrochloric acid with a liquid-solid ratio of 10 to obt...

Embodiment 2

[0064] Mix 45Kg of yttrium-zirconium powder with 35Kg of caustic soda and 5Kg of borax and fuse them in an iron crucible at 400°C for 50 minutes, take out the melt and cool it to 150°C, put it into a simple reverberatory furnace at 900°C for 1.5 hours to obtain a sintered material 84.5Kg, pulverize below 150 mesh, add water for leaching for 1 hour with a liquid-solid ratio of 5, wash twice with soft water with a liquid-solid ratio of 4, filter out and soak the precipitate with 1mol / L hydrochloric acid with a liquid-solid ratio of 3:2 for 50 minutes, and use 0.6mol / L L hydrochloric acid rinse to Na:Zr≤1:80, 30% by weight hydrochloric acid reacts with it, reaction temperature 105°C, acidity 3.0mol / L, concentrate to Baume degree B'=34°, add concentrated hydrochloric acid to control acidity At 6.0mol / L, cooling and crystallization, 6.5mol / L hydrochloric acid with a liquid-solid ratio of 10 was rinsed to obtain zirconium oxychloride crystals and yttrium-rich mother liquor, and the z...

Embodiment 3

[0070] Mix 1.05Kg yttrium-zirconium powder with 0.7Kg caustic soda and 0.08Kg borax and fuse in an iron crucible at 400°C for 45 minutes, take out the melt and cool it to 150°C, put it in a magnesium refractory sagger and place it in a high-temperature furnace at 850°C React for 1.2 hours to obtain 1.7Kg of sintered material, crush it below 150 mesh, add water to leaching for 30 minutes at a liquid-solid ratio of 5, wash twice with soft water at a liquid-solid ratio of 4, filter out and soak the precipitate with 2 liters of hydrochloric acid with a concentration of 1mol / L for 40 minutes , rinsed with 0.7mol / L hydrochloric acid until Na:Zr≤1:80, 28% by weight of hydrochloric acid reacted with it, the reaction temperature was 100°C, the acidity was 2.7mol / L, concentrated to Baume degree B'=33°, Add concentrated hydrochloric acid to control the acidity at 5.8mol / L, cool to room temperature to crystallize, rinse with 6.2mol / L hydrochloric acid with a liquid-solid ratio of 10 to obt...

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Abstract

The process of preparing zirconia and yttria with Y-doped cubic zirconia powder includes the following steps: alkali fusing and sintering Y-doped cubic zirconia powder, water washing to eliminate sodium, acidifying and concentrating to obtain Zr crystal, oxychlorination to re-crystallize and purify, and high temperature calcining to obtain high purity jewel level zirconia; concentrating Y-containing mother liquid to crystallize zirconia, purifying high Y mother liquid, precipitating Y in oxalic acid solution, and high temperature calcining to obtain high purity jewel level yttria. The present invention has relatively low cost.

Description

1. Technical field [0001] The invention relates to a method for preparing zirconium and yttrium oxides, in particular to a method for preparing zirconia and yttrium oxide from yttrium-doped cubic zirconia powder. 2. Background technology [0002] Zirconia and yttrium oxide are mainly used in the manufacture of functional ceramics and structural ceramics in a broad sense. Their common fields involve military industry, aerospace, atomic energy application industry, electronic components, special gemstones, glass, refractory materials, ceramic engines, solid fuel cells, etc. In addition, zirconia is the raw material for producing zirconium sponge, and can also be used in the manufacture of insulating ceramics (electric porcelain, stone porcelain), glazes, pigments, polishing powder, automobile exhaust purifiers, etc.; yttrium oxide is the raw material for producing metal yttrium , can also be used in the manufacture of fluorescent materials, superconducting materials, etc. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02C01F17/00C04B35/48C04B35/50C04B35/626
Inventor 王必庆
Owner 王必庆
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