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Method of preparing Lu2O3 base transparent ceramics by low-temperature sintering

A technology of transparent ceramics and low-temperature sintering, which is applied in the preparation of low-temperature sintering process and the preparation of Lu2O3-based transparent ceramics, which can solve the problems of difficulty in obtaining transparent ceramic samples and the like.

Inactive Publication Date: 2009-10-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But using traditional ceramic preparation technology and commercial Y 2 o 3 and Lu 2 o 3 Micropowder, its sintering temperature is still as high as 2000-2200°C, and it is difficult to obtain transparent ceramic samples

Method used

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  • Method of preparing Lu2O3 base transparent ceramics by low-temperature sintering

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: adopt commercial high-purity 99.99% Lu2 o 3 , Y 2 o 3 and 99.95% La 2 o 3 as raw materials; three raw materials according to chemical composition [Lu 1-y (Y 1-x La x ) y ] 2 o 3 , take x = 0.1, y = 0.4, weigh the ingredients, put the ingredients in a ball mill, and mix them with distilled water for 24 hours; discharge, dry at 150°C; then synthesize at 1200°C for 3 hours, and then put Enter the ball mill in the ball mill for 24 hours; discharge the material and dry at 150; then add the PVA binder with a concentration of 5wt%, and the addition is 5% of the weight of the raw material to granulate; then put the powder in a 200MPa refrigerator Press the tablet under static pressure; then burn off the excess PVA binder in the air at 800°C, and finally put it into a molybdenum wire furnace under a reducing atmosphere, and sinter at 1800°C for 3 hours to finally obtain a dense Lu 2 o 3 based transparent ceramics.

Embodiment 2

[0021] The process steps of this embodiment are exactly the same as those of Embodiment 1 above. The difference is: the ingredients are according to the chemical composition [Lu 1-y (Y 1-x La x ) y ] 2 o 3 Among them, x = 0.2, y = 0.5, so the sintering temperature can be reduced to 1600 ° C, sintering at this temperature for 3 hours, and finally a dense Lu 2 o 3 based transparent ceramics.

Embodiment 3

[0023] The process steps of this embodiment are exactly the same as those of Embodiment 1 above. The difference is: the ingredients are according to the chemical composition [Lu 1-y (Y 1-x La x ) y ] 2 o 3 Among them, x = 0.2, y = 0.7, so the sintering temperature can be reduced to 1500 ° C, sintering at this temperature for 3 hours, and finally a dense Lu 2 o 3 based transparent ceramics.

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Abstract

The invention relates to a low-temperature sintering preparation method of Lu2O3-based transparent ceramics, which belongs to the technical field of preparation technology of special rare earth oxide ceramics. The present invention mainly adopts high-purity Lu2O3, Y2O3 and La2O3 as raw materials; according to the basic chemical composition formula [Lu1-y(Y1-xLax)y]2O3 of Lu2O3-based transparent ceramics, 0<x<0.3, 0<y<1.0 ; x, y are the mol ratio of gram atoms, and the ingredients are weighed; mixed with distilled water ball mill for 24 hours, dried, and then synthesized at 1000-13000 °C for 3 hours, then put into a ball mill for 24 hours, and dried at 150 °C. Then add 5wt% of PVA binder to granulate, press under cold isostatic pressure of 200MPa, and then sinter at 1500-1800°C for 3 hours in reducing atmosphere or vacuum, and finally obtain dense Lu2O3-based transparent ceramics.

Description

technical field [0001] The present invention relates to a Lu 2 o 3 Preparation method of base transparent ceramics, especially doped La 2 o 3 and Y 2 o 3 The Lu 2 o 3 The invention discloses a low-temperature sintering process preparation method for base transparent ceramics, which belongs to the technical field of preparation process of special rare earth metal oxide ceramics. Background technique [0002] Among the 600 laser materials that have been developed, crystal compounds containing lutetium (Lu) are particularly attractive, especially several compounds obtained by replacing Y with Lu, which have better performance, such as the rare earth Ln with tetrahedral structure. 3+ (representing the trivalent rare earth element Yb 3+ 、Nd 3+ etc.) doped LiLuF 4 Laser crystals are consistent melting compounds, and the same structure of Ln 3+ Doped LiYF 4 Laser crystals are inconsistent melting compounds; for doped Ln 3+ YAlO 3 Orthorhombic crystals and LuAlO 3 For...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/64C04B35/626C04B35/50
Inventor 杨秋红
Owner SHANGHAI UNIV