SiO_2/MgO摩尔比对MgO–Al_2O_3–SiO_2微晶玻璃析晶和晶相转变的影响
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摘要
采用熔融法制备了MgO–Al_2O_3–SiO_2(MAS)微晶玻璃,研究了SiO_2/MgO摩尔比对MAS微晶玻璃析晶和晶相转变的影响。结果表明:微晶玻璃初晶相为亚稳Mg_(0.6)Al_(1.2)Si_(1.8)O_6相,终晶相为堇青石相,随晶化温度升高,Mg_(0.6)Al_(1.2)Si_(1.8)O_6向堇青石相转变。SiO_2/MgO摩尔比对微晶玻璃析晶过程影响显著,随SiO_2/MgO摩尔比从2.5增加至3.6,晶相转变开始温度从1 000℃升高到1 150℃,晶相转变结束温度从1 050℃升高到1 180℃,Mg_(0.6)Al_(1.2)Si_(1.8)O_6相热稳定性提高,堇青石相析晶难度增大,晶相转变过程变慢。当SiO_2/MgO摩尔比为3.6时,1 080℃晶化后的微晶玻璃Vickers硬度达到最大10.4 GPa。
MgO–Al_2O_3–SiO_2 glass-ceramics were prepared by a melt quenching method. Effect of SiO2/MgO molar ratio on the crystallization and phase transition of MgO–Al_2O_3–SiO_2 glass-ceramics was investigated. The results show that the initial crystalline phase of the glass-ceramics is metastable phase Mg_(0.6)Al_(1.2)Si_(1.8)O_6 and the final crystalline phase is cordierite. Mg_(0.6)Al_(1.2)Si_(1.8)O_6 phase transforms to cordierite phase when crystallization temperature increases. SiO_2/MgO molar ratio has an effect on the crystallization processes of glass-ceramics. As SiO_2/MgO molar ratio varies from 2.5 to 3.6, the phase transition temperature increases from 1 000 ℃ to 1 150 ℃, and the phase transition ends from 1 050 ℃ to 1 180 ℃. The thermal stability of Mg_(0.6)Al_(1.2)Si_(1.8)O_6 phase enhances with increasing SiO_2/MgO molar ratio, thus causing a difficulty in cordierite crystallization and slowing down the phase transition process. The Vickers hardness of the glass-ceramic reaches the maximum value of 10.4 GPa after crystallization at 1 080 ℃ when SiO_2/MgO molar ratio increases to 3.6.
MgO–Al_2O_3–SiO_2 glass-ceramics were prepared by a melt quenching method. Effect of SiO2/MgO molar ratio on the crystallization and phase transition of MgO–Al_2O_3–SiO_2 glass-ceramics was investigated. The results show that the initial crystalline phase of the glass-ceramics is metastable phase Mg_(0.6)Al_(1.2)Si_(1.8)O_6 and the final crystalline phase is cordierite. Mg_(0.6)Al_(1.2)Si_(1.8)O_6 phase transforms to cordierite phase when crystallization temperature increases. SiO_2/MgO molar ratio has an effect on the crystallization processes of glass-ceramics. As SiO_2/MgO molar ratio varies from 2.5 to 3.6, the phase transition temperature increases from 1 000 ℃ to 1 150 ℃, and the phase transition ends from 1 050 ℃ to 1 180 ℃. The thermal stability of Mg_(0.6)Al_(1.2)Si_(1.8)O_6 phase enhances with increasing SiO_2/MgO molar ratio, thus causing a difficulty in cordierite crystallization and slowing down the phase transition process. The Vickers hardness of the glass-ceramic reaches the maximum value of 10.4 GPa after crystallization at 1 080 ℃ when SiO_2/MgO molar ratio increases to 3.6.
引文
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[2]LIU F,HUANG X,QU J,et al.Crystallization behavior,densification and microwave dielectric properties of MgO-Al2O3-SiO2-TiO2 system glass-ceramics containing V2O5[J].J Non-Cryst Solids,2018,481.
[3]王慧娟,李泊涛,林慧兴,等.TiO2对MgO-Al2O3-SiO2-TiO2-La2O3系微晶玻璃相变和微波介电性能的影响[J].硅酸盐学报,2015,43(4):498-503.WANG Huijuan,LI Botao,LIN Huixing,et al.J Chin Ceram Soc,2015,43(4):498-503.
[4]SHAMSUDIN Z,HODZIC A,SOUTIS C,et al.Characterisation of thermo-mechanical properties of MgO-Al2O3-SiO2 glass ceramic with different heat treatment temperatures[J].J Mater Sci,2011,46(17):5822-5829.
[5]DITTMER M,YAMAMOTO CF,BOCKER C,et al.Crystallization and mechanical properties of MgO/Al2O3/SiO2/ZrO2 glass-ceramics with and without the addition of yttria[J].Solid State Sci,2011,13(12):2146-2153.
[6]DITTMER M,MüLLER M,RüSSEL C.Self-organized nanocrystallinity in MgO-Al2O3-SiO2 glasses with ZrO2 as nucleating agent[J].Mater Chem Phys,2010,124(2):1083-1088.
[7]SEIDEL S,DITTMER M,WISNIEWSKI W,et al.Effect of ZrO2concentration on the crystallization behaviour and the mechanical properties of high-strength MgO-Al2O3-SiO2 glass-ceramics[J].JMater Sci,2016,52(4):1-14.
[8]卢安贤,王宁,肖卓豪.碱金属氧化物对MgO-Al2O3-SiO2系统微晶玻璃析晶和性能的影响[J].中南大学学报(自然科学版),2008,39(1):42-47.LU Anxian,WANG Yu,XIAO Zhuohao.J Cent South Univ(Sci&Technol)(in Chinese),2008,39(1):42-47.
[9]HAO Xiaojun,HU Xiaolin,LUO Zhiwei,et al.Preparation and properties of transparent cordierite-based glass-ceramics with high crystallinity[J].Ceram Int,2015,41(10):14130-14136.
[10]LEI Han,JUN Song,QIAN Zhang,et al.Crystallization,structure and characterization of MgO-Al2O3-SiO2-P2O5 transparent glass-ceramics with high crystallinity[J].J Non-Cryst Solids,2018,481:123-131.
[11]王树明,梁开明.Fe2O3-TiO2掺杂对MgO-Al2O3-SiO2系玻璃晶化行为的影响[J].稀有金属材料与工程,2007,36(s2):319-321.WANG Shuming,LIANG Kaiming.Rare Met Mater Eng(in Chinese),2007,36(s2):319-321.
[12]陈国华,刘心宇.CeO2含量对MgO-Al2O3-SiO2系玻璃结构和晶化特性的影响[J].中南大学学报(自然科学版),2006(1):6-10.CHEN Guohua,LIU Xinyu.J Cent South Univ(Sci&Technol)(in Chinese),2006(1):6-10.
[13]GAWRONSKI A,PATZIG C,H?CHE T,et al.Effect of Y2O3 and Ce O2 on the crystallisation behaviour and mechanical properties of glass-ceramics in the system MgO/Al2O3/SiO2/ZrO2[J].J Mater Sci,2015,50(4):1986-1995.
[14]HWANG Shiang-Po,WU Jenn-Ming.Effect of composition on microstructural development in MgO-Al2O3-SiO2 glass-ceramics[J].JAm Ceram Soc,2010,84(5):1108-1112.
[15]单瑛,李家治,邓泽群,等.堇青石基玻璃分相对析晶行为的影响[J].硅酸盐学报,1981(4):403-407.SHAN Ying,LI Jiazhi,DENG Zequn,et al.J Chin Ceram Soc,1981(4):403-407.
[16]SCHULZ H,HOFFMANN W,MUCHOW G M.The average structure of Mg[Al2Si3O10],a stuffed derivative of the high-quartz structure[J].ZKrist-Cryst Mater,1971,134(1/2):1-27
[17]陈岚,梁焕珍,李锐星,等.计算机在定量相分析中的应用[J].计算机与应用化学,2003,20(1):191-194.CHEN Lan,LIANG Huanzhen,LI Ruixing,et al.Comput Appl Chem(in Chinese),2003,20(1):191-194.
[18]LI Zhen,WU Jianfang,SONG Li,et al.Effect of composition on sinter-crystallization and properties of low temperature co-firedα-cordierite glass-ceramics[J].J Eur Ceram Soc,2014,34(15):3981-3991.
[19]周凯,杨智杰,朱基千.掺P2O5氟化镓铟基玻璃微晶化可控性机理[J].材料科学与工程学报,2011(2):210-213.ZHOU Kai,YANG Zhijie,ZHU Jiqian.J Mater Sci Eng(in Chinese),2011(2):210-213.
[20]李俊杰,田英良,张璐.K2O/Na2O对R2O-Al2O3-SiO2玻璃力学和热学性能影响[J].燕山大学学报,2018,42(1):48-52.LI Junjie,TIAN Yingliang,ZHANG Lu.J Yanshan Univ(in Chinese),2018,42(1):48-52.
[21]肖卓豪,包启富,罗文艳,等.高热膨胀Na2O-MgO-Al2O3-SiO2微晶玻璃的制备及性能研究[J].人工晶体学报,2015,44(11):33:3350-3354.XIAO Zhuohao,BAO Qifu,LUO Wenyan,et al.J Synth Cryst(in Chinese),2015,44(11):3350-3354.
[22]田英良,孙诗兵.新编玻璃工艺学[M].北京:中国轻工业出版社,2009:6.