熔盐对ZrO<sub>2</sub>纤维模板辅助燃烧合成ZrB<sub>2</sub>纤维的影响

doi:10.11896/j.issn.1005-023X.2018.22.007

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Abstract The short ZrB₂ fibers were synthesized by template assisted combustion synthesis, taking ZrO₂ fibers, Mg and B₂O₃ as raw materials, NaCl, MgCl₂ and their compound salts as diluents. The adiabatic temperature of the systems was calculated by trial method. The effects of molten salt content on the phase composition and micromorphology of the products were investigated by XRD and SEM, respectively. The results showed that the adiabatic temperature decreased with the increment of molten salt content. The adiabatic temperature drop of the system with NaCl was more obvious, especially in high molten salt content condition. The NaCl added samples comprised of ZrB₂ and small amounts of residual ZrO₂. Small amount of Mg₃B₂O₆ was found in the sample added with MgCl₂. The addition of molten salt could prevent the ZrO₂ fibers from melting and make it easier for product to maintain the shape of original fiber. The crystallite size of the product could be reduced by NaCl and MgCl₂ in the systems. MgCl₂ could promote the crystallization of ZrB₂ and they grew into the hexagon crystals of clear boundaries with the increasing content of MgCl₂. From the analysis of residual ZrO₂ and grain size, the effect of single salt was superior to compound salt, and MgCl₂ was more effective than NaCl.

Key words： ZrB₂ fiber molten salt combustion synthesis

Published: 21 December 2018

CLC number:

TQ174

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	XIAO Guoqing
	ZHOU Pan
	DING Donghai

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XIAO Guoqing,ZHOU Pan,DING Donghai. Effects of Molten Salt on ZrO₂ Fibers Template Assisted Combustion Synthesis of ZrB₂ Fibers[J]. Materials Reports, 2018, 32(22): 3875-3879.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.22.007 OR http://www.mater-rep.com/EN/Y2018/V32/I22/3875

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