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Zirconium silicate powder and preparation method and application thereof

A technology of zirconium silicate and powder, applied in the field of zirconium silicate powder and its preparation, can solve the problems of uneven morphology, large crystal size, irregular and uniform powder morphology, etc.

Inactive Publication Date: 2018-10-26
HUBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ZrSiO prepared by this method 4 Larger crystal size and uneven morphology
[0004] In summary, ZrSiO prepared by prior art 4 Irregular and uniform powder shape

Method used

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  • Zirconium silicate powder and preparation method and application thereof
  • Zirconium silicate powder and preparation method and application thereof
  • Zirconium silicate powder and preparation method and application thereof

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preparation example Construction

[0026] The invention provides a method for preparing zirconium silicate powder, including the following steps: (1) mixing a zirconium source, acid and water to obtain a zirconium source solution; (2) mixing a silicon source and a solvent to obtain a silicon source solution (3) The zirconium source solution obtained in the step (1) is mixed with the silicon source solution obtained in the step (2) and then pre-hydrolyzed to obtain a precursor solution; (4) the step (3) is obtained The precursor solution, mineralizer, and surfactant are mixed to perform a solvothermal reaction to obtain zirconium silicate powder; the steps (1) and (2) are not limited in order.

[0027] The invention mixes zirconium source, acid and water to obtain zirconium source solution. In the present invention, the zirconium source preferably includes one or more of zirconium sulfate, zirconium nitrate, zirconyl nitrate, zirconium chloride, zirconium oxychloride, zirconium acetate, zirconium acetylacetonate, a...

Embodiment 1

[0047] (1) Mix zirconium chloride, sulfuric acid and water to obtain a zirconium chloride solution with a concentration of 0.09 mol / L; wherein the molar ratio of zirconium chloride to sulfuric acid is 1:35;

[0048] (2) Mix ethyl orthosilicate, water, and ethanol at a molar ratio of 1:450:40 to obtain an ethyl orthosilicate solution with a concentration of 0.10 mol / L;

[0049] (3) Add the ethyl orthosilicate solution dropwise to the zirconium chloride solution, adjust the volume to control the molar ratio of the zirconium source to the silicon source at 1:1.2; pre-hydrolyze in a water bath at 20°C for 5 hours to obtain the precursor solution ;

[0050] (4) Add sodium fluoride with a molar ratio of zirconium chloride: sodium fluoride=1:0.8 to the precursor solution and the theoretical total mass of zirconium silicate (the silicon source and the zirconium source are 100% converted into zirconium silicate) 3% PEG and 0.02% urea were mixed, and solvothermal reaction was carried out at 1...

Embodiment 2

[0054] (1) Mix zirconium oxychloride, hydrochloric acid and water to obtain a zirconium oxychloride solution with a concentration of 0.12mol / L; wherein the molar ratio of zirconium oxychloride to hydrochloric acid is 1:50;

[0055] (2) Mix sodium silicate, water and isopropanol at a molar ratio of 1:500:30 to obtain a sodium silicate solution with a concentration of 0.09mol / L;

[0056] (3) Add the sodium silicate solution dropwise to the zirconium oxychloride solution, adjust the volume ratio to control the molar ratio of the zirconium source to the silicon source at 1:1.1; pre-hydrolyze in a water bath at 30°C for 0.5h to obtain the precursor Solution

[0057] (4) Add sodium fluoride with a molar ratio of zirconium oxychloride: sodium fluoride=1:1.5 to the precursor solution and the total mass of theoretical zirconium silicate (the silicon source and the zirconium source are 100% converted into zirconium silicate ) Mix 5% of PVP and carry out a solvothermal reaction at 180°C for 12...

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Abstract

The invention provides a preparation method of zirconium silicate powder, and relates to the technical field of high-performance powder materials. The preparation method of the zirconium silicate powder comprises the following steps that 1, a zirconium source, acid and water are mixed to obtain a zirconium source solution; 2, a silicon source and a solvent are mixed to obtain a silicon source solution; 3, the zirconium source solution obtained in the step 1 and the silicon source solution obtained in the step 2 are subjected to mixing and prehydrolysis in sequence to obtain a precursor solution; 4, the precursor solution obtained in the step 3, a mineralizer and a surfactant are mixed for solvothermal reaction to obtain the zirconium silicate powder; the sequence of the step 1 and the step2 is not limited. The zirconium silicate powder prepared by adopting the method is 0.2-2.0-micron spheres.

Description

Technical field [0001] The invention relates to the technical field of high-performance powder materials, in particular to a zirconium silicate powder and a preparation method and application thereof. Background technique [0002] Zirconium Silicate (ZrSiO 4 ) Commonly known as zircon, it belongs to the tetragonal crystal system. It is a high temperature resistant inorganic compound with high refractive index, high melting point, low coefficient of expansion, and low thermal conductivity. Take ZrSiO 4 The device as the main raw material has good thermal shock resistance, excellent stability, and high strength. The strength index does not significantly decrease before 1400°C; it will be decomposed into ZrO after 1670°C 2 And SiO 2 . Secondly, ZrSiO 4 Good chemical stability and resistance to various chemical corrosion. In addition, ZrSiO 4 It is a kind of transparent crystal itself, when it is used to wrap the colorant, it will not have much influence on the color development of ...

Claims

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Application Information

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IPC IPC(8): C01B33/20
CPCC01B33/20C01P2002/72C01P2004/03C01P2004/32C01P2004/61C01P2004/62
Inventor 雷丙龙彭珊陈仁华高云
Owner HUBEI UNIV
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