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材料导报  2021, Vol. 35 Issue (7): 7013-7018    https://doi.org/10.11896/cldb.20060080
  材料与可持续发展(四)--材料再制造与废弃物料资源化利用* |
Na2CO3助熔剂与基于石棉尾矿微晶陶瓷晶相转变和理化性能的关联规律探索
周果1,2, 孙红娟1,2, 彭同江1,2,3
1 西南科技大学固体废物处理与资源化教育部重点实验室,绵阳 621010
2 西南科技大学矿物材料及应用研究所,绵阳 621010
3 西南科技大学分析测试中心,绵阳 621010
Exploration of the Correction Between Na2CO3 Fluxing Agent and Crystal Phase Transformation and Mechanical Properties of Asbestos Tailings Microcrystalline Ceramics
ZHOU Guo1,2, SUN Hongjuan1,2, PENG Tongjiang1,2,3
1 Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
2 Institute of Mineral Materials and Applications, Southwest University of Science and Technology, Mianyang 621010, China
3 Center of Forecating and Analysis, Southwest University of Science and Technology, Mianyang 621010, China
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摘要 以石棉尾矿为主要原料,Na2CO3作为助熔剂,采用一次烧结法制备出以镁橄榄石为主晶相的微晶陶瓷。采用X射线衍射分析、场发射扫描电子显微镜等测试手段对不同条件制备的微晶陶瓷样品进行表征,研究了烧结温度、Na2CO3添加量对微晶陶瓷晶相转变、显微结构和理化性能的影响。结果表明:未添加Na2CO3时,提高烧结温度仅使赤铁矿消失;当Na2CO3添加量为4%(质量分数,下同)时,赤铁矿与顽火辉石消失。高温烧结过程中赤铁矿与顽火辉石逐渐转化为镁铁尖晶石和镁橄榄石。Na2CO3添加量为4%(质量分数)时,在烧结温度1 150 ℃条件下制备的微晶陶瓷的理化性能达到最佳,其体积密度、线性收缩率、抗折强度分别为2.85 g/cm3、11.4%、65.4 MPa。添加Na2CO3对石棉尾矿微晶陶瓷晶相转变及理化性能具有重要的影响。
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周果
孙红娟
彭同江
关键词:  助熔剂  石棉尾矿  微晶陶瓷  晶相半定量    
Abstract: Microcrystalline ceramic with forsterite as the main crystal phase was produced through one-time method using asbestos tailings as the main raw material and Na2CO3 as the fluxing agent. The influence of sintering temperature and contents of Na2CO3 on the crystalline phases, mechanical properites and microstructure were invested using X-ray diffraction and scanning electron microsopy to determine these preparing microcrystalline ceramics. The results obtained show that Na2CO3 content is 0%,the increase of sintering temperature would only lead to the disappearance of hematite. Hematite and enstatite had disappeared when Na2CO3 content is 4%, hematite and enstatite converted into magnesioferrite and forsterite gradually during the sintering process. The microcrystalline ceramic achieved optimum mechanical proerites at the sintering temperature of 1 150 ℃ and 4% Na2CO3 content with the bulk density being 2.85 g/cm3, the liner shrinkage being 11.4% and the flexural strength being 65.4 MPa. Na2CO3 plays an important role in the crystal phase transformation and mechanical properties improvement of microcrystalline ceramics prepared by asbestos tailings.
Key words:  fluxing agent    asbestos tailings    microcrystalline ceramic    crystal semi-quantitative
               出版日期:  2021-04-10      发布日期:  2021-04-22
ZTFLH:  TQ174.9  
基金资助: 国家重点研发项目(2018YFC1802902);西南科技大学龙山学术人才科研支持团队项目(17LZXT11)
作者简介:  周果,2018年毕业于四川农业大学,获得工学学士学位。现为西南科技大学环境与资源学院硕士研究生,在孙红娟教授和彭同江教授的指导下进行研究。目前主要研究领域为工业固体废弃物资源化利用。
孙红娟,博士,教授,博士研究生导师。中国矿物复合材料专业委员会委员,中国硅酸盐学会非金属矿分会理事,中国矿物岩石地球化学学会矿物材料专业委员会委员、中国地质学会矿物专业委员会委员,四川省纳米协会副理事长。主要从事纳米矿物材料的制备及应用、石墨烯材料的制备与应用、固体废物资源化处理等研究。主持国家自然科学基金项目3项、省部级项目8项、企业合作项目25项等。在国内外知名学术刊物和学术会议上发表学术论文150余篇,其中EI、SCI收录80余篇,出版专著1部。获四川省科技进步三等奖2项;已授权专利15项。
引用本文:    
周果, 孙红娟, 彭同江. Na2CO3助熔剂与基于石棉尾矿微晶陶瓷晶相转变和理化性能的关联规律探索[J]. 材料导报, 2021, 35(7): 7013-7018.
ZHOU Guo, SUN Hongjuan, PENG Tongjiang. Exploration of the Correction Between Na2CO3 Fluxing Agent and Crystal Phase Transformation and Mechanical Properties of Asbestos Tailings Microcrystalline Ceramics. Materials Reports, 2021, 35(7): 7013-7018.
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http://www.mater-rep.com/CN/10.11896/cldb.20060080  或          http://www.mater-rep.com/CN/Y2021/V35/I7/7013
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