MoO<sub>3</sub>含量对钙钛锆石基硼硅酸盐玻璃陶瓷的影响

doi:10.11896/cldb.21080150

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Abstract A series of zirconolite-based borosilicate glass-ceramics were synthesized by in-situ heat treatment. The effects of MoO₃ content on crystalline phase, microstructure and chemical durability of the zirconolite-based borosilicate glass-ceramics were investigated. The results show that glass transition temperature increases slightly with increasing content of MoO₃. In the absence of the yellow phase, the main crystalline phase is zirconolite for all of the samples. When the content of MoO₃ up to 4.88wt%, spherical powellite crystals appear in the bulk of glass-ceramics. However, the glass-ceramic containing 7.14wt% of MoO₃ produced yellow phase. The SEM results show that the increase of MoO₃ content has effects on the grain size and the number, but has no significant effect on the morphology and distribution of zirconolite crystals. In the case of no yellow phase, all the glass-ceramic samples are evenly distributed with excellent chemical stability. For the CM0, CM2 and CM4 samples, the normalized leaching rates of Si, Ca and Mo of these samples stabilize at 14 days and is of the order of 10^-3 g·m^-2·d^-1and the leaching rates of Ce stabilize after a sharp drop on the third day, and fell as low as 10^-6 g·m^-2·d^-1.

Key words： glass-ceramic zirconolite high-level waste in-situ heat treatment

Published: Online: 2023-07-10

CLC number:

TQ171

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	Articles by authors
	WAN Wei
	ZHU Yongchang
	ZHANG Xingquan
	CUI Zhu
	YANG Debo
	JIAO Yunjie
	HUO Jichuan
	MENG Baojian

Cite this article:

WAN Wei,ZHU Yongchang,ZHANG Xingquan, et al. Effect of MoO₃ Content on the Zirconolite-based Borosilicate Glass-Ceramics[J]. Materials Reports, 2023, 37(13): 21080150-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21080150 OR http://www.mater-rep.com/EN/Y2023/V37/I13/21080150

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