Effect of Carbon Source on Boron Loss in Preparation of Zirconium Diboride by Carbothermal Reduction

Yu Chong; Leng Ke; Wang Yi; Zeng Qiang; Tang Yan; Liu Zhe

doi:10.13832/j.jnpe.2022.S2.0088

Volume 43 Issue S2

Dec. 2022

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Article Navigation > Nuclear Power Engineering > 2022 > 43(S2): 88-93

Yu Chong, Leng Ke, Wang Yi, Zeng Qiang, Tang Yan, Liu Zhe. Effect of Carbon Source on Boron Loss in Preparation of Zirconium Diboride by Carbothermal Reduction[J]. Nuclear Power Engineering, 2022, 43(S2): 88-93. doi: 10.13832/j.jnpe.2022.S2.0088

Citation:

Yu Chong, Leng Ke, Wang Yi, Zeng Qiang, Tang Yan, Liu Zhe. Effect of Carbon Source on Boron Loss in Preparation of Zirconium Diboride by Carbothermal Reduction[J]. Nuclear Power Engineering, 2022, 43(S2): 88-93. doi: 10.13832/j.jnpe.2022.S2.0088

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Effect of Carbon Source on Boron Loss in Preparation of Zirconium Diboride by Carbothermal Reduction

doi: 10.13832/j.jnpe.2022.S2.0088

Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-08-23
Rev Recd Date: 2022-10-10
Publish Date: 2022-12-31

Abstract

Abstract

In order to solve the problem of easy loss of boron in the preparation of nuclear grade ZrB₂ target used in the third-generation nuclear power reactor AP1000, ZrO₂ powder was prepared by carbothermal reduction method using ZrO₂, B₄C and C as raw materials. The effects of carbon source and carbon addition on boron loss during high temperature synthesis were studied. The phase composition, micro morphology and element content of the samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and chemical titrator. The loss of boron content in the process of powder synthesis was calculated according to the boron content before and after synthesis and the principle of mass conservation. The results show that the loss of boron can be caused by the preparation of ZrB₂ powder by carbothermal reduction; Compared with graphite, using carbon black as the carbon source with appropriate excess can effectively reduce the loss of boron in the synthesis process; When B₄C exceeds by 5% and carbon exceeds by 20%, the boron loss rate in the synthesis process is the lowest 4.4%, and the particle size of ZrB₂ powder is uniform, the particle size is 1-2 1~2 μm, and the purity is high.
- Carbothermal reduction,
- ZrB₂ powder,
- Graphite,
- Carbon black,
- Boron loss

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References(15)

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