Method for preparing yttrium oxide-based transparent ceramic employing two-step sintering method

A technology of transparent ceramics and yttrium oxide, which is applied in the field of preparing yttrium oxide-based transparent ceramics by two-step sintering, can solve the problems of low transmittance of transparent ceramics, poor mechanical properties of transparent ceramics, and high cost of preparation process, and achieves suppression of grain boundaries. The effect of migration, elimination of tiny pores, and improvement of overall performance

Inactive Publication Date: 2015-04-22
徐州市江苏师范大学激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above literature, the transparent ceramics prepared by the two-step sintering process generally have low transmittance, and the grain size of some results is still on the order of microns or three-step sintering is required, and the mechanical properties of the prepared transparent ceramics are relatively poor. The process is cumbersome, the efficiency is low, and the cost of the whole preparation process is relatively high

Method used

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  • Method for preparing yttrium oxide-based transparent ceramic employing two-step sintering method
  • Method for preparing yttrium oxide-based transparent ceramic employing two-step sintering method
  • Method for preparing yttrium oxide-based transparent ceramic employing two-step sintering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 # (undoped, Y 2 o 3 ):

[0027] Composition as in Table 1 1 # Shown, specific preparation method comprises the following steps:

[0028] ①Weigh the raw materials according to the composition in Table 1, first put the oxide raw material powder into a nylon ball mill jar, add 150g of high-purity zirconia balls, and add sintering aids and absolute ethanol; ball mill and mix on a planetary ball mill For 18 hours, the rotation speed is 100r / min, and the slurry used for two-step sintering is obtained; the slurry after ball milling is dried in a drying oven; then, it is sieved with 60 meshes, and the sieved powder is calcined in a muffle furnace at 600°C 8h;

[0029] ②Using a hydraulic press and cold isostatic pressing to shape the powder obtained in step ①. The molding conditions are: pre-pressing pressure 15MPa, cold isostatic pressing pressure 250MPa, cold waiting time 3min, calcined at 600°C for 8h in a muffle furnace to obtain Y 2 o 3 Biscuit;

[0030] ...

Embodiment 2

[0031] Example 2 # (3mol%Tm:Y 2 o 3 ,(Y 0.97 T m 0.03 ) 2 o 3 ):

[0032] Composition as in Table 1 2 # Shown, specific preparation method comprises the following steps:

[0033] ①Weigh the raw materials according to the composition in Table 1, first put the oxide raw material powder into a nylon ball mill jar, add 150g of high-purity zirconia balls, and add sintering aids and absolute ethanol; ball mill and mix on a planetary ball mill 10 hours at a speed of 180r / min to obtain the slurry used for two-step sintering; the slurry after ball milling was dried in a drying oven; then sieved with 200 meshes, and the sieved powder was calcined in a muffle furnace at 800°C 5h;

[0034] ②Using a hydraulic press and cold isostatic pressing to shape the powder obtained in step ①. The molding conditions are: pre-pressing pressure 18MPa, cold isostatic pressing pressure 200MPa, cold waiting time 5min, calcined at 800℃ for 5h in a muffle furnace to obtain Y 2 o 3 Biscuit;

[00...

Embodiment 3

[0036] Example 3 # (30mol%Yb:Y 2 o 3 ,(Y 0.7 Yb 0.3 ) 2 o 3 ):

[0037] Composition as in Table 1 3 # Shown, specific preparation method comprises the following steps:

[0038] ① Weigh the raw materials according to the composition in Table 1. First, put the oxide raw material powder into a nylon ball mill jar, add 150g of high-purity zirconia balls, and add sintering aids and absolute ethanol to prepare the slurry; The upper ball mill was mixed for 15 hours at a speed of 140r / min to obtain the slurry used for two-step sintering; the slurry after ball milling was dried in a drying oven; Calcination at 1000℃ for 3h;

[0039] ②Using a hydraulic press and cold isostatic pressing to shape the powder obtained in step ①. The molding conditions are: pre-pressing pressure 30MPa, cold isostatic pressing pressure 150MPa, cold waiting time 10min, calcined at 1000℃ for 3h in a muffle furnace to obtain Y 2 o 3 Biscuit;

[0040] ③ Sinter the biscuit obtained in step ② in vacuum...

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Abstract

The invention relates to a method for preparing yttrium oxide-based transparent ceramic employing a two-step sintering method. The method comprises the following steps: weighing raw material powder at the molar ratio of metal elements required for (Y1-xREx)2O3 (x is smaller than or equal to 0.3 and greater than or equal to 0.0); adding a sintering aid and a solvent, drying ball-milled slurry; sieving and burning; burning by virtue of a muffle furnace after molding, so as to obtain a Y2O3 biscuit; sintering through a two-step sintering process; and finally carrying out high-temperature isostatic pressing sintering, annealing and polishing, so as to obtain the yttrium oxide-based transparent ceramic. The Y2O3-based transparent ceramic prepared by the method has good uniformity; the average crystallite size is 100-300nm; the mechanical property of the Y2O3-based transparent ceramic is effectively improved; the transmittance at 1100nm is high; the method is suitable for a gain medium of a high power laser; the two-step sintering temperature is relatively low; and two-step sintering can be finished within a short period of time, so that the experiment cycle is shortened; and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing yttrium oxide (Y 2 o 3 )-based transparent ceramics, in particular to a method for preparing yttrium oxide-based transparent ceramics by two-step sintering, more precisely a method based on zirconia (ZrO 2 ) as a sintering aid, two-step sintering, followed by hot isostatic pressing to prepare Y with high transmittance and good uniformity 2 o 3 The base transparent ceramic belongs to the field of advanced ceramics. Background technique [0002] Since Japanese scientist Ikesue realized the continuous laser output of Nd:YAG transparent ceramics by solid-state reaction sintering method in 1995, laser ceramic materials have received extensive attention, and great progress has been made in improving the optical quality of ceramics and exploring new laser materials. . Trivalent lanthanide doped Y 2 o 3 Transparent ceramics are very promising laser materials because of their good refractoriness, good stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/64
Inventor 张乐张倩王骋
Owner 徐州市江苏师范大学激光科技有限公司
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