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Method for preparing ZrB2-Al2O3 composite powder

A zrb2—al2o3, composite powder technology, applied in the field of ceramics and refractory materials, can solve the problems of high production cost, need for special atmosphere, complex self-propagating synthesis equipment, etc., and achieve the effect of low synthesis cost, easy to obtain, and small particle size

Inactive Publication Date: 2009-05-06
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yang Zhenguo et al. adopted the self-propagating method. The disadvantages of this method are: the self-propagating synthesis equipment is complex, requires a special atmosphere, and the production cost is high.
Chen Haigong et al. adopted high-energy ball milling method, but its disadvantage is that high-energy ball milling equipment and special atmosphere are needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Will Fe 2 o 3 Powder (purity 90%, particle size 100 μm) and metal Al powder (purity 90%, particle size 100 μm) were weighed at a molar ratio of 1:2 and put into a ball mill tank for ball milling and dry mixing. 3 hours.

[0020] Metal Al powder (purity 99%, particle size 50μm), ZrO 2 Powder (purity 99%, particle size 45 μm), and B 2 o 3 The powder (purity 99%, particle size 45μm) is weighed at a molar ratio of 10:3:3, put into a ball mill tank and dry-mixed evenly. The volume ratio of the ball to the material is 3:1. Ball mill for 3 hours. Pressed into a green body under pressure.

[0021] The green body is surrounded by carbon felt and placed in the middle of a ceramic container, buried with thermite, and ignited with magnesium strips. After the reaction is over, the reactants are crushed and sieved to obtain ZrB with a purity of 96% and a particle size of 6-9 μm. 2 —Al 2 o 3 Composite powder.

Embodiment 2

[0023] Will Fe 2 o 3 Al powder (purity 90%, particle size 100 μm) and metal Al powder (purity 92%, particle size 74 μm) were weighed in a molar ratio of 1:2, put into a ball mill jar and dry-mixed evenly, the volume ratio of ball to material was 2:1, and ball mill 4 hours.

[0024] Metal Al powder (purity 99.3%, particle size 38μm), ZrO 2 (purity 99%, particle size 38 μm), and B 2 o 3 The powder (purity 99%, particle size 45μm) is weighed according to the molar ratio of 10:3:3.5, put into the ball mill and dry-mixed evenly. Pressed into a green body under pressure.

[0025] The pressed green body is surrounded by carbon felt and placed in the middle of a ceramic container, buried with thermite and ignited with magnesium strips. After the reaction is finished, the reactant is crushed and sieved to obtain a product with a purity of 97% and a particle size of 5-8 μm.

Embodiment 3

[0027] Will Fe 2 o 3 Al powder (purity 92%, particle size 80 μm) and metal Al powder (purity 94%, particle size 74 μm) were weighed at a molar ratio of 1:2.1 and put into a ball mill tank for ball milling and dry mixing. The volume ratio of ball to material was 2:1. 5 hours.

[0028] Metal Al powder (purity 99.5%, particle size 25μm), ZrO 2 Powder (purity 99.3%, particle size 20 μm), and B 2 o 3 The powder (purity 99%, particle size 38 μm) is weighed according to the molar ratio of 10:3:4, put into the ball mill tank and dry-mixed evenly. The volume ratio of ball to material is 3:1. Ball mill for 5 hours. Pressed into a green body under pressure.

[0029] The pressed green body is surrounded by carbon felt and placed in the middle of a ceramic container, buried with thermite and ignited with magnesium strips. After the reaction is finished, the reactant is crushed and sieved to obtain a product with a purity of 98% and a particle size of 5-7 μm.

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Abstract

The invention belongs to the technical field of ceramics and refractory materials, and particularly relates to a method for preparing ZrB2-Al2O3 composite powder. Fe2O3 powder and metal Al powder are taken as raw materials of a thermit, the metal Al powder, ZrO2 powder and B2O3 powder are taken as raw materials for synthesizing the ZrB2-Al2O3 composite powder, and the heat emitted by a thermit reaction is utilized to ignite a reaction for synthesizing the ZrB2-Al2O3 composite powder. The method has a simple preparation technology, does not need special equipment and atmosphere, has cheap needed raw materials and small energy consumption and using time, and is environment-friendly; and the synthesized powder has high purity, fine granularity, and low manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of ceramics and refractory materials, and in particular relates to a method for preparing ZrB 2 —Al 2 o 3 Method of composite powder. Background technique [0002] ZrB 2 It is a metalloid structure compound of C32 type in the hexagonal system. The Zr-B ionic bond between the boron atomic face and the zirconium atomic face and the strong bond of the B-B covalent bond determine the ZrB 2 Ceramic has the characteristics of high melting point, high hardness, high stability, good electrical conductivity, thermal conductivity and good corrosion resistance, and is a high-temperature ceramic material with excellent performance. ZrB 2 Ceramics have been widely used in the fields of high-temperature structural ceramic materials, composite materials, refractory materials, electrode materials, and nuclear control materials. But due to ZrB 2 Ceramics have a high melting point, are not easy to sinter, and their own...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王刚王来稳周继伟王龙庆周军李代兵
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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