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用锰方硼石尾矿低温烧结制备微晶玻璃
作者:穆小占1 汤庆国1 2 刘玉林3 段昕辉1 2 张红1 2 梁金生1 2 
单位:1. 生态环境与信息特种功能材料教育部重点实验室河北工业大学 天津 300130  2. 河北工业大学能源与环保材料研究所 天津 300130 3. 中国地质科学院郑州矿产综合利用研究所 郑州 450006 
关键词:锰方硼石尾矿 微晶玻璃 单斜辉石 低温烧结 粒径 
分类号:TB332
出版年,卷(期):页码:2016,44(2):322-327
DOI:10.14062/j.issn.0454-5648.2016.02.20
摘要:

?以蓟县锰方硼石重选尾矿为主要原料,采用低温烧结制备以单斜辉石为主晶相的微晶玻璃,探讨焙烧制度以及粉体粒径对微晶玻璃性能的影响。采用差热分析、X射线衍射分析和扫描电子显微镜观测等测试手段,对不同条件下制备的微晶玻璃样品性能、晶体结构和显微形貌变化进行了研究,分析了影响样品性能的主要因素以及尾矿中残余锰方硼石促进低温烧结微晶玻璃的机理。结果表明:当烧结温度为890 ℃时,形成直径约0.1~0.5 μm、长度1~2 μm,表面较平整的四方柱状结构的单斜辉石晶体。该微晶玻璃样品的抗折强度随着粉体粒径的减小而提高,当粉体的粒径d90达到5.71 μm时,样品的抗折强度达128 MPa。尾矿中剩余的锰方硼石矿物是大幅度降低微晶玻璃烧结温度的关键成分。

 A glass ceramic with clinopyroxene as a primary crystalline phase was prepared with chambersite ore tailings from Tianjin (China) as a raw material. The effects of roasting system and powder particle size on the property of glass ceramics were investigated. The integrated performance, crystal structure and microstructure of glass ceramic products under different preparation conditions were determined by thermal analysis, X-ray diffraction and scanning electron microscopy, respectively. The main factors influencing the properties of glass ceramic products and the low-temperature sintering mechanism were discussed. The results indicate that the four-square column structure of clinopyroxene crystals with the diameter of 0.1–0.5 μm and the length of 1–2 μm form when the sintering temperature is 890 ℃. The bending strength of glass ceramics increases with the decrease of particle size. When the particle size (d90) is 5.71 μm, the flexural strength of the samples is 128 MPa. Chambersite remained in the ore tailings is a key factor to reduce the sintering temperature.

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基金项目:
中国地质调查局项目(12120114077401);河北省自然基金(E2013202142)项目。
作者简介:
穆小占(1991—),男,硕士研究生。
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