La<sub>2</sub>O<sub>3</sub>对高钛高炉渣制备微晶泡沫玻璃的影响

doi:10.11896/j.issn.1005-023X.2018.16.011

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Abstract Foam glass-ceramics were prepared by “one step” sintering method, using high titanium blast furnace slag and glass cullet as the main materials, with adding calcium carbonate as foaming agents, borax as flux-agents, and trisodium phosphate as foam stabilizers. The effects of La₂O₃ (0wt%-3.5wt%) on the crystalline phases, microstructure, and properties of foam glass-ceramics were studied in this research. The results showed that the crystal phase species of foam glass-ceramics barely changed with La₂O₃ adding, while the crystallinity increased. With La₂O₃ increasing from 0wt％ to 1.5wt％, the diameter of the bubble decreased. Besides the shape of crystals changed from particulate into short columned. The bulk density and compressive strength of foam glass-ceramics increased. The porosity, water absorption and thermal conductivity decreased. However, with increasing La₂O₃ from 1.5wt％ to 3.5wt％, the diameter of the bubble increased. The shape of crystals turned to irregular shape. The bulk density and compressive strength of foam glass-ceramics decreased, the porosity, water absorption and thermal conductivity increased. The optimum comprehensive property of foam glass-ceramics was achieved at 1.5wt％ La₂O₃.

Key words： foam glass-ceramics high titanium blast furnace slag La₂O₃ rare earth

Published: 18 September 2018

CLC number:

TQ171.72

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	Articles by authors
	YAN Zidi
	FENG Keqin
	CHEN Changhong
	SHUI Yue

Cite this article:

YAN Zidi,FENG Keqin,CHEN Changhong, et al. Influence of La₂O₃ on Foam Glass-Ceramics Prepared from High Titanium Blast Furnace Slag[J]. Materials Reports, 2018, 32(16): 2763-2767.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.16.011 OR http://www.mater-rep.com/EN/Y2018/V32/I16/2763

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