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Preparation method of transparent yttria ceramic

A technology of transparent ceramics and yttrium oxide, applied in the field of preparation of rare earth oxide transparent ceramics, can solve the problems of difficult yttrium oxide transparent ceramics, lower sintering temperature, complicated processing procedures, etc. Effect

Inactive Publication Date: 2011-09-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the preparation of yttrium oxide transparent ceramics at home and abroad adopts commercial powder, which requires higher sintering temperature, or adds toxic sintering additives to reduce the sintering temperature, or adopts complicated processing procedures, which brings great harm to the preparation of yttrium oxide transparent ceramics. many difficulties

Method used

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  • Preparation method of transparent yttria ceramic
  • Preparation method of transparent yttria ceramic
  • Preparation method of transparent yttria ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Set Y(NO 3 ) 3 and Nd(NO 3 ) 3 According to the Nd content is 1% of the total molar amount of metal ions, while adding 10% of the total molar amount of metal ions (NH 4 ) 2 SO 4 And 0.06% PAA as composite dispersant, 0.5% MgSO in total molar amount of metal ions 4 ·7H 2 O was used as a sintering aid. After weighing the five medicines, they were dissolved in deionized water and stirred thoroughly to form a mixed solution with a total molar amount of metal ions of 0.2 mol / L.

[0022] 2) Weigh the ammonium bicarbonate by 3 times of the total molar amount of metal ions, keep the volume of the ammonium bicarbonate solution to be 2 times that of the mixed mother liquor, add deionized water, stir to make it fully dissolved.

[0023] 3) At room temperature, using the forward titration method, slowly drop the precipitant ammonium bicarbonate solution into the mixed solution of metal ions at a rate of ≤5mL / min, and stir, and it will appear milky white turbid at the begi...

Embodiment 2

[0031] 1) Set Y(NO 3 ) 3 and Nd(NO 3 ) 3 According to the Nd content is 2% of the total amount of moles of metal ions, while adding 20% ​​of the total amount of moles of metal ions (NH 4 ) 2 SO 4 and 0.04% of PAA as a composite dispersant, and 0.5% of MgSO in total molar amounts of metal ions 4 ·7H 2 O was used as a sintering aid. After weighing the five medicines, they were dissolved in deionized water and stirred thoroughly to form a mixed solution with a total molar amount of metal ions of 0.4mol / L.

[0032] 2) Weigh the ammonium bicarbonate by 4 times the molar weight of the metal ions, keep the volume of the ammonium bicarbonate solution at 2.5 times the volume of the mixed mother liquor, add deionized water, stir to make it fully dissolved.

[0033] 3) At room temperature, using the forward titration method, slowly drop the precipitant ammonium bicarbonate solution into the mixed solution of metal ions at ≤5mL / min, and stir. As the reaction progresses further, th...

Embodiment 3

[0041] 1) Set Y(NO 3 ) 3 and Nd(NO 3 ) 3 According to the Nd content is 2% of the total amount of moles of metal ions, add 30% of the total amount of moles of metal ions (NH 4 ) 2 SO 4 and 0.03% of PAA as a composite dispersant, and 0.5% of MgSO in the total molar amount of metal ions 4 ·7H 2 O was used as a sintering aid. After weighing the five medicines, they were dissolved in deionized water and stirred thoroughly to form a mixed solution with a total molar amount of metal ions of 0.3mol / L.

[0042] 2) Weigh the ammonium bicarbonate according to 3.5 times the molar weight of the metal ions, keep the volume of the ammonium bicarbonate solution twice that of the mixed mother liquor, add deionized water, and stir to make it fully dissolved.

[0043] 3) At room temperature, using the forward titration method, slowly drop the precipitant ammonium bicarbonate solution into the mixed solution of metal ions at a rate of ≤5mL / min, and stir, and it will appear milky white tur...

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Abstract

The invention discloses a preparation method of transparent yttria ceramic, in particular relates to an ammonium bicarbonate co-precipitation method of Nd:Y2O3 nano powder. The method comprises the following steps: slowly dropwise adding a precipitator ammonium bicarbonate solution in a mixed solution prepared from yttrium, doped rare earth ion, (NH4)2SO4, polyacrylic acid (PAA) and MgSO4.7H2O at room temperature by using a positive-titration method so as to prepare a precursor, washing and drying; then calcining; carrying out preliminary press molding, cold isostatic pressing, vacuum sintering, annealing and polishing to obtain the transparent yttria ceramic. In the method, self-made high-activity nano powder is used for preparing the transparent yttria ceramic at low temperature; and the process is simple and practicable, and the prepared transparent yttria ceramic has a good optical property.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of rare earth oxide transparent ceramics, and particularly relates to Nd:Y 2 o 3 Ammonium bicarbonate co-precipitation method for nanopowder and transparent ceramics. Background technique [0002] In recent years, transparent ceramics have attracted much attention as a solid-state laser medium. Compared with single crystals, transparent ceramics are easy to prepare, can be made into large-sized samples, have low cost, can achieve high-concentration doping, and are easy to prepare multilayers and composite multifunctional ceramics. [0003] Yttrium oxide (Y 2 o 3 ) Transparent ceramic is a high-performance ceramic material with excellent properties such as heat resistance, corrosion resistance, extremely high melting point (up to 2430°C) and high dielectric constant (12-20). Yttrium oxide belongs to the cubic crystal system, and there is no birefringence phenomenon. After adding rare eart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/645C04B35/505
Inventor 曹永革黄志郭旺黄秋凤刘媛唐飞
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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