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Preparation method of zirconic acid yttrium transparent ceramics

A technology of transparent ceramics and zirconic acid, which is applied in the field of preparation of yttrium zirconate transparent ceramics, can solve the problems of transparent ceramics without yttrium zirconate, and achieve the effects of simple process, high sintering density and good controllability

Active Publication Date: 2013-11-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by its own sintering properties and sintering methods, there is no report on yttrium zirconate transparent ceramics

Method used

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  • Preparation method of zirconic acid yttrium transparent ceramics
  • Preparation method of zirconic acid yttrium transparent ceramics
  • Preparation method of zirconic acid yttrium transparent ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, yttrium zirconate powder was synthesized by combustion method. Zirconium nitrate (Zr(NO 3 ) 4 ·XH 2 O, 99.9%) and yttrium nitrate (Y(NO 3 ) 3 , 99.995%) is configured into a solution according to the molar ratio of Zr and Y as 1:1, then add fuel glycine, and adjust the pH value of the solution to 3 to 5 with ammonia water, heat the solution on a magnetic stirrer, and wait until the water in the solution After a short period of time, the combustion reaction is carried out on the electric furnace, and then the obtained precursor powder is placed in a muffle furnace for heat treatment of the powder, and the particle size of the powder after ball milling and sieving is 50-100nm. Then dry pressing (5MPa, holding pressure 1min) and cold isostatic pressing (200MPa, holding pressure 3min), and successively through processes such as pre-calcination, vacuum sintering, annealing heat treatment, obtain yttrium zirconate (Y 2 Zr 2 o 7 ) transparent ceramics. ...

Embodiment 2

[0027] In this example, yttrium zirconate powder was synthesized by a combustion method. Zirconium nitrate (Zr(NO 3 ) 4 ·XH 2 O, 99.9%) and yttrium oxide (Y 2 o 3 , 99.995%) according to the molar ratio of Zr and Y is 1: 1 metering dissolved in nitric acid solution, then add fuel glycine, and adjust the pH value of the solution with ammonia water to be 3 ~ 5, the solution is heated on a magnetic stirrer, until the solution When there is less water, move it to an electric furnace for combustion reaction, and then place the obtained precursor powder in a muffle furnace for powder heat treatment, and the particle size of the powder after ball milling and sieving is 50-100nm. Then dry pressing (5MPa, holding pressure 1min) and cold isostatic pressing (200MPa, holding pressure 3min), and successively through processes such as pre-calcination, vacuum sintering, annealing heat treatment, obtain yttrium zirconate (Y 2 Zr 2 o 7 ) transparent ceramics. The process conditions of ...

Embodiment 3-4

[0029] The preparation process is the same as in Example 1, and the process conditions such as powder heat treatment, molding, pre-calcination, vacuum sintering and annealing are shown in Table 1.

[0030] Table 1. Synthesis process conditions of yttrium hafnate transparent ceramics

[0031]

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Abstract

The invention provides a preparation method of zirconic acid yttrium transparent ceramics, which belongs to the field of transparent ceramics and comprises the following steps of (1) preparing powder: adopting a firing method for preparing zirconic acid yttrium powder; (2) molding: enabling the zirconic acid yttrium powder obtained in the step (1) to be dry pressed and molded under 5-20MPa to form a biscuit, and enabling the obtained biscuit to be cold isostatic pressed under 180-230MPa; (3) firing: pre-burning a sample processed in the step (2) for 2-4 hours at 1000-1400 DEG C, and then firing 4-10 hours at 1800-1900 DEG C under vacuum conditions; and (4) annealing heat treatment: conducting thermal insulation of the sample fired in the step (3) for 2-10 hours at 1400-1600 DEG C under air atmosphere, conducting the annealing heat treatment and obtaining zirconic acid yttrium transparent ceramics. The maximum straight line transmissivity of the transparent ceramics in a visible light scope is higher than 65%, and the preparation method has good application prospect in fields of information detection, laser medium, high temperature windows and the like.

Description

technical field [0001] The present invention relates to a kind of yttrium zirconate (Y 2 Zr 2 o 7 ) The preparation method of transparent ceramics belongs to the field of transparent ceramics. Background technique [0002] Transparent ceramics have both the inherent high strength, high insulation, high temperature resistance, corrosion resistance and other characteristics of ceramic materials and the optical properties of glass materials, and their application fields are very wide. [0003] Compared with single crystals, transparent ceramics can more easily achieve uniform doping of high-concentration ions according to device application requirements, avoiding the low doping concentration and uneven distribution caused by crystal growth process limitations. In addition, the preparation temperature of transparent ceramics is much lower than that of single crystals, which is especially practical for some materials with high melting points. Studies have shown that the perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/50C04B35/622
Inventor 邹小庆周国红王士维张海龙张广军
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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