Preparation method of transparent ceramic for nuclear reactor observation window

A technology for observation windows and transparent ceramics, which is applied in the preparation of transparent ceramics for nuclear reactor observation windows and Y2O3 transparent ceramics. It can solve the problems of high ceramic density and cannot meet the special needs of nuclear reactor observation window materials, and achieve high ceramic density. , short preparation cycle, uniform powder size distribution

Active Publication Date: 2016-01-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But nuclear reactor observation window material needs high ceramic density, good transparency, the Y of prior art report 2 o 3 Nano-powder and transparent ceramic sintering methods, the resulting products cannot meet the special needs of nuclear reactor observation window materials

Method used

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  • Preparation method of transparent ceramic for nuclear reactor observation window
  • Preparation method of transparent ceramic for nuclear reactor observation window
  • Preparation method of transparent ceramic for nuclear reactor observation window

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: a kind of Y 2 o 3 The preparation method of transparent ceramics, the steps are as follows:

[0049] (1) Weigh 47.88g of yttrium nitrate hexahydrate and 19.12g of yttrium acetate tetrahydrate in a molar ratio of 1:0.45, mix them, add 250g of deionized water, stir at 70°C until a clear precursor solution is formed, and then continue stirring 1 hour to ensure that the components in the solution are uniform;

[0050] Weigh 30 g of the obtained clarified precursor solution and put it in a corundum crucible, place it in a microwave oven with a frequency of 2.45 GHz, heat it for 15 min at a power of 300 W, and undergo rapid boiling, evaporation and self-propagating combustion of the solution to obtain the average particle size 17.2nm Y 2 o 3 Powder;

[0051] (2) Weigh 10 g of nano powder body obtained in step (1), ZrO 2 Put 200g of balls and 45g of absolute ethanol in a ball mill jar, place the ball mill jar in a planetary ball mill, and mill at a speed of...

Embodiment 2

[0056] Embodiment 2: a kind of preparation Y 2 o 3 The method of transparent ceramics, the steps are as follows:

[0057] (1) Weigh 47.88g of yttrium nitrate hexahydrate and 21.13g of yttrium acetate tetrahydrate in a molar ratio of 1:0.5, mix them, add 200g of deionized water, and stir at 50°C until a clear precursor solution is formed, then continue stirring 2 hours to ensure that the components in the solution are uniform;

[0058] Weigh 20 g of the obtained clarified precursor solution and put it in a corundum crucible, place it in a microwave oven with a frequency of 2.45 GHz, heat it for 10 min at a power of 400 W, and undergo rapid boiling, evaporation and self-propagating combustion of the solution to obtain the average particle size 20nm Y 2 o 3 Powder;

[0059] (2) Weigh the Y obtained in step (1) 2 o 3 Powder 10g, ZrO 2 Put 160g of balls and 40g of anhydrous ethanol in a ball mill jar, put the ball mill jar in a planetary ball mill, and mill at a speed of 20...

Embodiment 3

[0061] Embodiment 3: a kind of preparation Y 2 o 3 The method of transparent ceramics, the steps are as follows:

[0062] (1) Weigh 47.88g of yttrium nitrate hexahydrate and 23.25g of yttrium acetate tetrahydrate in a molar ratio of 1:0.55, mix them, add 230g of deionized water, stir at 50°C until a clear precursor solution is formed, and then continue stirring 1.5 hours to ensure that the components in the solution are uniform;

[0063] 25g of the obtained clarified precursor solution was weighed and packed in a corundum crucible, placed in a microwave oven with a frequency of 2.45GHz, heated for 15min at a power of 4500W, and rapidly boiled, evaporated, and self-propagating combustion of the solution to obtain Y 2 o 3 Nano powder;

[0064] (2) Weigh the Y obtained in step (1) 2 o 3 Nano powder 10g, ZrO 2 Put 220g of balls and 50g of absolute ethanol in a ball mill jar, place the ball mill jar in a planetary ball mill, and mill at a speed of 200r / min for 1h; place the ...

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Abstract

The invention relates to a preparation method of transparent ceramic for a nuclear reactor observation window. The method comprises the following steps of firstly, mixing yttrium nitrate and yttrium acetate according to the mole ratio of 1:(0.4 to 0.6), then adding water, placing the obtained clarified precursor solution into a microwave oven and heating for 5 to 25 minutes; carrying out boiling, evaporating and self-propagating combustion to obtain Y2O3 nano powder with the particle size of 10 to 35nm; secondly, carrying out ball milling on the obtained Y2O3 nano powder, drying, dry-pressing molding, vacuum encapsulation and cold isostatic pressing to obtain a Y2O3 ceramic body; and then placing the Y2O3 ceramic body into a microwave sintering furnace for sintering at the temperature of 1,300 to 1,500DEG C to obtain the transparent ceramic. The preparation method disclosed by the invention is high in heating speed and is short in time; the ceramic can be quickly densified under normal pressure conditions; the prepared ceramic can be used as a nuclear reactor observation window material.

Description

technical field [0001] The invention relates to a method for preparing transparent ceramics for the observation window of a nuclear reactor, in particular to a Y material with high density and good light transmission performance. 2 o 3 The invention discloses a method for preparing transparent ceramics, which belongs to the field of inorganic non-metallic materials. Background technique [0002] Yttrium oxide transparent ceramics have the advantages of high melting point, good chemical and photochemical stability, wide optical transparent area, high thermal conductivity, etc., and have good transmittance in the 0.23-8.0μm band. It is an excellent high-temperature infrared material, electronic Materials and refractory materials have important application value in high temperature window, infrared detection, luminescent medium, semiconductor and other industries. [0003] Adopt chemical co-precipitation method to synthesize Y in the prior art 2 o 3 Nano-powder, vacuum sint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/64
Inventor 张玉军张衍双龚红宇谭砂砾李腾
Owner SHANDONG UNIV
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