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Preparation method of <10>B-enriched zirconium diboride powder

A technology of zirconium diboride and zirconium dioxide is applied in the field of preparation of 10B-rich zirconium diboride powder, which can solve the problems of high product impurity content, high product purity, long production cycle, etc. The effect of high product purity and low production cost

Inactive Publication Date: 2015-10-07
LAIWU ADVANCED CERAMIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the shortcomings of the existing technology for preparing zirconium diboride powder, such as long production cycle and high impurity content in the product, the present invention proposes a kind of rich product with short production cycle, low impurity content and high product purity. 10 The preparation method of B zirconium diboride powder

Method used

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  • Preparation method of &lt;10&gt;B-enriched zirconium diboride powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a kind of rich 10 The preparation method of B zirconium diboride powder, comprises the steps:

[0034] 1) Zirconium dioxide with a particle size of 5-35 μm and zirconia with a particle size of 5-35 μm 10 B boron carbide ( 10 Carbon black with a B abundance of 86% (at.)) and a particle size of 10 to 30 μm is mixed and stirred evenly at a molar ratio of 2:1.2:5 to obtain zirconia, rich 10 B mixture of boron carbide and carbon black;

[0035] 2) Stir the zirconia, rich 10 The mixture of B boron carbide and carbon black is placed in a graphite crucible;

[0036] 3) Place the crucible in a pressureless sintering furnace, under an argon atmosphere, heat the mixture at 1600°C, and conduct a compound reaction of the mixture. 10 B zirconium diboride powder material;

[0037] 4) The reaction product was wet ball milled for 8 hours to obtain an average particle size of 0.9 μm, rich in 10 B zirconium diboride powder.

[0038] The rich obtained in this example 10 The partic...

Embodiment 2

[0040] a kind of rich 10 The preparation method of B zirconium diboride powder, comprises the steps:

[0041]1) Zirconium dioxide with a particle size of 5-35 μm and zirconia with a particle size of 5-35 μm 10 B boron carbide ( 10 Carbon black with B abundance of 92% (at.)) and particle size of 10 to 30 μm is mixed and stirred evenly in a molar ratio of 2:1.2:4 to obtain zirconia, rich 10 B mixture of boron carbide and carbon black;

[0042] 2) Stir the zirconia, rich 10 The mixture of B boron carbide and carbon black is placed in a graphite crucible;

[0043] 3) Place the crucible in a pressureless sintering furnace, under an argon atmosphere, at a heating temperature of 1700°C, and carry out a compound reaction of the mixture, and after holding for 0.7h, obtain 97% pure 10 B zirconium diboride powder material.

[0044] 4) The reaction product was wet ball milled for 10 hours to obtain an average particle size of 0.75 μm, rich in 10 B zirconium diboride powder.

[004...

Embodiment 3

[0047] a kind of rich 10 The preparation method of B zirconium diboride powder, comprises the steps:

[0048] 1) Zirconium dioxide with a particle size of 5-35 μm and zirconia with a particle size of 5-35 μm 10 B boron carbide ( 10 B carbon black with an abundance of 95% (at.)) and a particle size of 10 to 30 μm, mixed and stirred evenly in a molar ratio of 2:1.2:3.3 to obtain zirconia, rich in 10 A mixture of boron carbide and carbon black of B;

[0049] 2) Stir the zirconium dioxide, rich 10 The mixture of boron carbide and carbon black of B is placed in a graphite crucible;

[0050] 3) Place the crucible in a pressureless sintering furnace, and in an argon atmosphere, heat the mixture at 1800°C for a compound reaction. After keeping it for 1 hour, a 98% purity sintering compound is obtained. 10 B zirconium diboride powder material.

[0051] 4) The reaction product was wet ball milled for 12 hours to obtain an average particle size of about 0.65 μm, rich in 10 B zirco...

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Abstract

The invention relates to a preparation method of <10>B-enriched zirconium diboride powder. The preparation method of <10>B-enriched zirconium diboride powder comprises the following steps: 1) taking and mixing zirconium dioxide, <10>B-enriched boron carbide with <10>B abundance of 60-99 percent (at.) and carbon black according to a molar ratio of 2:1.23-5.15), and performing uniform agitation to obtain mixture; 2) putting the mixture in a graphite crucible; 3) putting the graphite crucible containing the mixture in a pressureless sintering furnace, calcinating at 1500-1800 DEG C under an argon atmosphere, and preserving heat for 0.5-2h to obtain the <10>B-enriched zirconium diboride powder. The invention adopts a carbon thermal reduction method to synthesize the <10>B-enriched zirconium diboride powder and the products are zirconium diboride and carbon monoxide; the produced carbon monoxide is burned, treated and exhausted out of a system, no impurity is introduced, the components of the products are stable and the preparation method is suitable for mass production.

Description

technical field [0001] The present invention relates to a rich 10 A method for preparing zirconium diboride powder belongs to the technical field of new materials. Background technique [0002] Natural boron has two stable isotopes, namely 10 B and 11 B, The abundances are 19.78% and 80.22%, respectively. 10 B has the unique characteristic of high absorption of neutrons, due to this characteristic, making 10 B's related products have been widely used in military fields such as military protection, nuclear weapons and nuclear industry. [0003] Zirconium diboride ceramics have the characteristics of high melting point, high hardness, good electrical and thermal conductivity, and good neutron control ability, and are rich in 10 B zirconium diboride material has excellent mechanical properties and excellent neutron absorption. It greatly improves the strength of neutron-absorbing components of nuclear reactors, and has great research and development potential in the field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/04
Inventor 张玉军马丽谭砂砾
Owner LAIWU ADVANCED CERAMIC TECH
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