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Columnar crystal zirconium oxide powder as well as preparation method and application thereof

A technology of zirconia powder and columnar crystal is applied in the field of inorganic material preparation, which can solve the problems of harsh production conditions, high fusion temperature and high energy consumption, and achieve the effects of increasing productivity and improving visible light transmittance.

Active Publication Date: 2021-11-23
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the average particle size of the powder prepared by the said invention is less than 0.2 μm, and a large number of grain boundaries need to be fused during sintering to make porcelain, and the fusion temperature is relatively high. High, the production conditions are relatively harsh

Method used

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  • Columnar crystal zirconium oxide powder as well as preparation method and application thereof
  • Columnar crystal zirconium oxide powder as well as preparation method and application thereof
  • Columnar crystal zirconium oxide powder as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0063] This embodiment provides a columnar crystal zirconia powder and a preparation method thereof, the composition of the columnar crystal zirconia powder is Al 0.003 Y 0.03 Zr 0.97 o 1.9895 , the preparation method comprises the following steps:

[0064] (1) Liquid preparation: wash a 3000mL beaker with deionized water in advance, accurately weigh out 64.45g zirconium oxychloride octahydrate, 2.30g yttrium nitrate hexahydrate and 0.225g aluminum nitrate nonahydrate in a balance, Pour it into the beaker, and add 1000mL deionized water to dissolve; stir the obtained solution with a digital display magnetic heating stirrer for 3min to form a stable mixed solution; prepare a clean 500mL beaker, and measure 25wt with a graduated cylinder Pour 75mL of ammonia water into it, add 300mL of deionized water, and stir evenly with a glass rod;

[0065] (2) Settling: Start stirring the mixed solution, set the rotating speed to 200r / min, slowly add diluted ammonia water dropwise to it...

Embodiment 2

[0075] This embodiment provides a columnar crystal zirconia powder and a preparation method thereof, the composition of the columnar crystal zirconia powder is Al 0.0025 Y 0.03 Zr 0.97 o 1.98875 , the preparation method comprises the following steps:

[0076] (1) Dosing: Wash five 3000mL beakers with deionized water in advance, and accurately weigh 5 groups of 25.78g zirconium oxychloride octahydrate, 0.92g yttrium nitrate hexahydrate and 0.075g nitric acid nonahydrate in the balance Aluminum, pour into 5 beakers respectively, add 1000mL deionized water for each group to dissolve; stir each group of solutions with a digital display magnetic heating stirrer for 3min to form a stable mixed solution; prepare 5 clean 500mL In a beaker, use a graduated cylinder to measure 30mL of 25wt% ammonia water and pour it into it, add 300mL of deionized water, and stir evenly with a glass rod;

[0077] (2) Settling: Start stirring the mixed solution, set the rotation speed of each group t...

Embodiment 3

[0085] This embodiment provides a columnar crystal zirconia powder and a preparation method thereof, the composition of the columnar crystal zirconia powder is Al 0.003 Y 0.05 Zr 0.95 O1.9795, the preparation method comprises the following steps:

[0086] (1) Dosing: Wash six 3000mL beakers with deionized water in advance, and accurately weigh out six groups of 12.25g zirconium oxychloride octahydrate, 0.767g yttrium nitrate hexahydrate and 0.045g nitric acid nonahydrate in the balance Aluminum, pour into 6 beakers respectively, add 1000mL deionized water for each group to dissolve; stir each group of solutions with a digital display magnetic heating stirrer for 3min to form a stable mixed solution; prepare 6 clean 500mL For each group, use a measuring cylinder to measure 15mL of 25wt% ammonia water and pour it into it, add 300mL of deionized water, and stir evenly with a glass rod;

[0087] (2) Settling: Start stirring the mixed solution, set the rotation speed of each gro...

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Abstract

The invention provides columnar crystal zirconium oxide powder and a preparation method and application thereof. The composition of the columnar crystal zirconium oxide powder is Al<x>YZr<1-a>O<2-0.5a+1.5x>, wherein x is greater than or equal to 0 and less than or equal to 0.003, and a is greater than or equal to 0.03 and less than or equal to 0.12. The column diameter distribution D50 of the columnar crystals in the columnar crystal zirconium oxide powder is 2-3 [mu]m; and the average length of columnar crystals in the columnar crystal zirconium oxide powder is 10-20 [mu]m. The preparation method comprises the steps of liquid preparation, precipitation boiling, separation and crystallization which are carried out in sequence. The linear transmittance of a ceramic chip prepared from the columnar crystal zirconia powder in a visible light range is larger than or equal to 53%, the sintering temperature of the ceramic chip in the preparation process is smaller than or equal to 1100 DEG C, a preparation process is simplified, and energy consumption and production cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and relates to a zirconia powder, in particular to a columnar crystalline zirconia powder and its preparation method and application. Background technique [0002] At this stage, the research on zirconia powder is mainly developing in the direction of small particle size and high dispersion, often ignoring the excellent performance that large-size crystal powder may also bring. At present, there are few cases of research on large-size crystalline zirconia powders. For small-sized crystalline zirconia powders, when preparing high-transparency ceramics, light reflection and refraction are often increased due to dense grain boundaries and other reasons. The high frequency makes the light transmittance poor, and the large-size zirconia powder has a small number of grain boundaries when fused at high temperature, which can effectively improve the light transmittance of ceram...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/626
CPCC04B35/48C04B35/62605C04B35/622C04B2235/549C04B2235/9646C04B2235/3217C04B2235/3225
Inventor 王亚兵谢文琦
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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