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Preparation method of yttrium vanadate transparent ceramic

A technology of transparent ceramics and yttrium vanadate, which is applied in the field of preparation of yttrium vanadate transparent ceramics, can solve the problems of complex operation, long time consumption, high production cost, etc., and achieve the effects of good light transmission, improved sintering activity and low cost

Inactive Publication Date: 2019-02-19
JIUJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of yttrium vanadate transparent ceramics, which solves the problems of high production cost, complicated operation and long time consumption in the prior art method

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  • Preparation method of yttrium vanadate transparent ceramic
  • Preparation method of yttrium vanadate transparent ceramic
  • Preparation method of yttrium vanadate transparent ceramic

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preparation example Construction

[0028] A preparation method of yttrium vanadate transparent ceramics, the method comprises the following steps:

[0029] (1) Dissolve yttrium nitrate hexahydrate in deionized water, and magnetically stir to obtain an aqueous solution of yttrium nitrate;

[0030] (2) Add an appropriate amount of citric acid to the solution obtained in step (1), and perform magnetic stirring;

[0031] (3) adding an appropriate amount of ammonium metavanadate to the mixed solution obtained in step (2), and performing magnetic stirring to obtain a mixed solution;

[0032] (4) Put the mixed solution obtained in step (3) in an electric oven to evaporate water to obtain a brown solid product;

[0033] (5) after pulverizing the product obtained in step (4), annealing in a muffle furnace, washing with dilute nitric acid and deionized water, and drying to obtain yttrium vanadate nanopowder;

[0034] (6) Dry pressing the yttrium vanadate nanopowder obtained in step (5), and sintering it in an air atmos...

Embodiment 1

[0041] (1) Dissolve 3.83 g of yttrium nitrate hexahydrate in 40 mL of deionized water, and stir magnetically for 15 min to obtain an aqueous solution of yttrium nitrate; add 1.68 g of citric acid monohydrate, and stir magnetically for 10 min; then add 1.17 g of ammonium metavanadate , carried out magnetic stirring for 30 minutes to obtain a mixed solution; put the mixed solution in a 70°C electric oven and evaporate for 3 to obtain a sol, and then evaporate in a 110°C electric oven for 24 hours to obtain a brown solid product; pulverize the obtained product in an agate mortar Finally, it was annealed in a muffle furnace at 900°C for 60 min, washed several times with dilute nitric acid and deionized water, and dried to obtain yttrium vanadate nanopowder;

[0042] (2) Put the yttrium vanadate nano-powder obtained in step (1) into a mold, and press unidirectionally at 60 MPa for 10 min to obtain a yttrium vanadate ceramic green body, which was sintered in an air atmosphere at 1500...

Embodiment 2

[0044] (1) Dissolve 3.83 g of yttrium nitrate hexahydrate in 40 mL of deionized water, and stir magnetically for 15 min to obtain an aqueous solution of yttrium nitrate; add 1.68 g of citric acid monohydrate, and stir magnetically for 10 min; then add 1.17 g of ammonium metavanadate , carried out magnetic stirring for 30 minutes to obtain a mixed solution; put the mixed solution in a 70°C electric oven and evaporate for 3 to obtain a sol, and then evaporate in a 110°C electric oven for 24 hours to obtain a brown solid product; pulverize the obtained product in an agate mortar Finally, it was annealed in a muffle furnace at 900°C for 60 min, washed several times with dilute nitric acid and deionized water, and dried to obtain yttrium vanadate nanopowder;

[0045] (2) Put the nano-powder of yttrium vanadate obtained in step (1) into a mold, and dry-press unidirectionally at 60 MPa for 10 min to obtain a yttrium vanadate ceramic green body, which is sintered in an air atmosphere a...

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Abstract

A preparation method of an yttrium vanadate transparent ceramic comprises the following steps: dissolving yttrium nitrate hexahydrate in deionized water at first, magnetically stirring to obtain an yttrium nitrate aqueous solution, then adding a proper amount of citric acid and ammonium metavanadate, and magnetically stirring to obtain a mixed solution; placing the mixed solution in an oven and evaporating to remove water so as to obtain a brown solid product, breaking the product and then annealing the product in a muffle furnace, and washing and drying the product with dilute nitric acid anddeionized water to obtain yttrium vanadate nano powder; and finally carrying out dry pressing forming on the obtained yttrium vanadate nano powder, and sintering in a pressure-free manner in an air atmosphere to obtain the yttrium vanadate transparent ceramic. The yttrium vanadate ceramic prepared by the invention is high in compactness and good in light transparency, and moreover, the method hasthe advantages of low sintering temperature, simple preparation process, short production period, low cost and the like, and is suitable for industrialized production of a yttrium vanadate transparent ceramic material.

Description

technical field [0001] The invention relates to a preparation method of yttrium vanadate transparent ceramics. Background technique [0002] Yttrium vanadate (YVO 4 ) belongs to the tetragonal crystal system, with a tetragonal zircon structure, and the space group is D 4h , unit cell parameters a = b = 0.712 nm, c = 0.629 nm, density 4.22 g / cm 3 , melting point 1825°C, thermal conductivity 5.10~5.23 W / mK. Yttrium vanadate has good chemical stability, thermal stability and mechanical properties. It can be doped with high-concentration rare earth luminescent ions and obtain high-efficiency fluorescence in the visible region. Therefore, yttrium vanadate is an excellent luminescent host material. Such as europium ion doped yttrium vanadate (YVO 4 :Eu 3+ ) The luminescent material can emit relatively pure red light under the excitation of ultraviolet light. This material is widely used in high-pressure mercury lamps, cathode emission tubes, and X-ray detectors. [0003] Ytt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/64C04B35/626
CPCC04B35/495C04B35/622C04B35/626C04B35/64C04B2235/3225C04B2235/656C04B2235/6567C04B2235/6583C04B2235/668C04B2235/9653
Inventor 郭艳艳王殿元王庆凯段兴凯吴杏华
Owner JIUJIANG UNIVERSITY
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