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材料导报  2024, Vol. 38 Issue (13): 23010083-6    https://doi.org/10.11896/cldb.23010083
  无机非金属及其复合材料 |
晶化制度对Mg0.6Al1.2Si1.8O6透明微晶玻璃结构与性能的影响
包镇红1, 罗薇2, 苗立锋1,*, 江伟辉1
1 景德镇陶瓷大学国家日用及建筑陶瓷工程技术研究中心,江西 景德镇 333001
2 嘉兴佳利电子有限公司,浙江 嘉兴 314000
Effects of Crystallization Schedule on Microstructure and Properties of Mg0.6Al1.2Si1.8O6 Transparent Glass-ceramics
BAO Zhenhong1, LUO Wei2, MIAO Lifeng1,*, JIANG Weihui1
1 National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic University, Jingdezhen 333001, Jiangxi, China
2 Jiaxing Glead Electronics Co.,Ltd., Jiaxing 314000, Zhejiang, China
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摘要 MgO-Al2O3-SiO2(MAS)系统微晶玻璃具有较高的机械强度、较低的介电损耗以及良好的化学稳定性和热稳定性等优点,在电子、军事、建筑等领域表现出极大的应用价值。采用熔融法,通过控制Mg0.6Al1.2Si1.8O6固溶体晶相的析出以制备MAS透明微晶玻璃。采用XRD、SEM和UV-Vis-NIR等测试手段研究了晶化制度对微晶玻璃结构和性能的影响。结果表明:晶化温度从950 ℃升高到1 020 ℃,试样中析出Mg0.6Al1.2Si1.8O6,微晶玻璃透明;当晶化温度为1 050 ℃及更高温度时,试样中析出堇青石,微晶玻璃失透。随晶化温度的升高,玻璃发生Mg0.6Al1.2Si1.8O6向堇青石的晶相转变。与堇青石相比,Mg0.6Al1.2Si1.8O6晶相折射率更接近玻璃相折射率。晶化时间由2 h延长至10 h,微晶玻璃的晶相含量由42.9%(质量分数)提高至97.5%;晶化4~10 h的微晶玻璃中晶粒平均尺寸由17.50 μm增大至30.58 μm。随着晶化时间的延长,微晶玻璃透光率呈现缓慢下降的趋势,热膨胀系数缓慢增加,维氏硬度呈现先增大后平缓的趋势,抗折强度先增加后减小。微晶玻璃最佳晶化制度为晶化温度1 020 ℃,晶化时间8 h。最佳晶化制度下的微晶玻璃具有较好的综合性能,其可见光区的透光率为83%,热膨胀系数为3.857×10-6/℃(600 ℃),维氏硬度为10.2 GPa,抗折强度为200 MPa。
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包镇红
罗薇
苗立锋
江伟辉
关键词:  Mg0.6Al1.2Si1.8O6固溶体  晶化温度  晶化时间  透明微晶玻璃    
Abstract: MgO-Al2O3-SiO2(MAS) system glass-ceramics have the properties of high mechanical, low dielectric loss, excellent chemical stability and thermal stability, showing great application value in electron, military, architecture and other fields. MAS transparent glass-ceramics were prepared by controlling the precipitation of Mg0.6Al1.2Si1.8O6 solid solution crystalline phase by melt quenching method. Effect of crystallization schedule on the microstructure and properties of glass-ceramics was investigated by XRD, SEM, hardness meter, bending strength tester and UV-Vis-NIR. The results show that when crystallization temperature increases from 950 ℃ to 1 020 ℃, the crystalline phase of glass-ceramics is Mg0.6Al1.2Si1.8O6 solid solution, and the glass-ceramics are transparent. When crystallization temperature rises to 1 050 ℃ and higher, the crystalline phase is cordierite and the glass-ceramics are opaque. Mg0.6Al1.2Si1.8O6 phase transforms to cordierite phase when crystallization temperature increase. Compared with the cordierite, the refractive index of Mg0.6Al1.2Si1.8O6 phase is closer to that of glass phase. The crystalline phase content of glass-ceramics increases from 42.9wt% to 97.5wt% with the increase of crystallization time from 2 h to 10 h. The average grain size of glass-ceramics increases from 17.50 μm to 30.58 μm with the increase of crystallization time from 4 h to 10 h. The light transmittance of glass-ceramics slowly decreases with prolonging crystallization time. The thermal expansion coefficient slowly increases with prolonging crystallization time. The Vickers hardness increases first and then flattens, and the bending strength increases first and then decreases with prolonging crystallization time. The suitable crystallization temperature is determined as 1 020 ℃, and the suitable crystallization time is determined as 8 h. When heat-treated at optimum crystallization schedule, the glass-ceramics have the best comprehensive properties, which have light transmittance of 83% in visible light region, thermal expansion coefficient of 3.857×10-6/℃(600 ℃), Vickers hardness of 10.2 GPa, and bending strength of 200 MPa.
Key words:  Mg0.6Al1.2Si1.8O6 solid solution    crystallization temperature    crystallization time    transparent glass-ceramics
出版日期:  2024-07-10      发布日期:  2024-08-01
ZTFLH:  TQ171  
基金资助: 国家自然科学基金(52262008);江西省自然科学基金(20212BAB204035);江西省高校人文社科重点研究基地项目(JD21082);江西省教育厅科学技术研究项目(GJJ201325); 江西省重点研发项目(20224BBE51050)
通讯作者:  *苗立锋,景德镇陶瓷大学材料科学与工程学院教授级高工、硕士研究生导师。2004年景德镇陶瓷大学热能与动力工程专业本科毕业,2007年景德镇陶瓷大学材料学专业硕士毕业后到景德镇陶瓷大学工作至今,2021年景德镇陶瓷大学材料科学与工程专业博士毕业。目前主要从事传统陶瓷材料的研究工作。发表论文20余篇,获授权发明专利10余项。mlf0624@163.com   
作者简介:  包镇红,景德镇陶瓷大学材料科学与工程学院副教授、硕士研究生导师。2004年景德镇陶瓷大学无机非金属材料专业本科毕业,2007年景德镇陶瓷大学材料学专业硕士毕业后到景德镇陶瓷大学工作至今,2019年景德镇陶瓷大学材料科学与工程专业博士毕业。目前主要从事陶瓷材料、微晶玻璃等方面的研究工作。发表论文20余篇,包括Ceramics International、《硅酸盐学报》《材料导报》等,获授权发明专利10余项。
引用本文:    
包镇红, 罗薇, 苗立锋, 江伟辉. 晶化制度对Mg0.6Al1.2Si1.8O6透明微晶玻璃结构与性能的影响[J]. 材料导报, 2024, 38(13): 23010083-6.
BAO Zhenhong, LUO Wei, MIAO Lifeng, JIANG Weihui. Effects of Crystallization Schedule on Microstructure and Properties of Mg0.6Al1.2Si1.8O6 Transparent Glass-ceramics. Materials Reports, 2024, 38(13): 23010083-6.
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http://www.mater-rep.com/CN/10.11896/cldb.23010083  或          http://www.mater-rep.com/CN/Y2024/V38/I13/23010083
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