[1]任祥忠,易先文,章勇,等.钙铝硅系微晶玻璃微观结构与力学性能研究[J].深圳大学学报理工版,2013,30(No.3(221-330)):319-324.[doi:10.3724/SP.J.1249.2013.03319]
 Ren Xiangzhong,Yi Xianwen,Zhang Yong,et al.Microstructure and mechanical properties of the CaO-Al2O3-SiO2 system glass-ceramics[J].Journal of Shenzhen University Science and Engineering,2013,30(No.3(221-330)):319-324.[doi:10.3724/SP.J.1249.2013.03319]
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钙铝硅系微晶玻璃微观结构与力学性能研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第30卷
期数:
2013年No.3(221-330)
页码:
319-324
栏目:
材料科学
出版日期:
2013-05-19

文章信息/Info

Title:
Microstructure and mechanical properties of the CaO-Al2O3-SiO2 system glass-ceramics
文章编号:
20130316
作者:
任祥忠易先文章勇刘艳张培新刘剑洪
深圳大学化学与化工学院,深圳市新型锂离子电池与介孔正极材料重点实验室,深圳 518060
Author(s):
Ren Xiangzhong Yi Xianwen Zhang Yong Liu Yan Zhang Peixin and Liu Jianhong
College of Chemistry and Chemical Engineering, Shenzhen Key Laboratory of New Lithium-ion Battery and Mesoporous Cathode Materials, Shenzhen University, Shenzhen 518060, P.R.China
关键词:
微晶玻璃顺磁共振正电子湮没力学性能微观结构显微硬度
Keywords:
glass ceramics electron paramagnetic resonance position annihilation technique mechanical properties microstructure microhardness
分类号:
TQ 171
DOI:
10.3724/SP.J.1249.2013.03319
文献标志码:
A
摘要:
通过熔融法制备出以钙长石为主晶相的CaO-Al2O3-SiO2(CAS)系微晶玻璃,采用差热分析、X射线衍射和扫描电子显微镜等测试手段,对不同TiO2添加量的CAS系微晶玻璃的结构和形貌进行表征,同时采用顺磁共振和正电子湮没寿命谱技术,探讨不同TiO2添加量对微晶玻璃微观结构与力学性能关系的影响.结果表明:不同TiO2加入量并不影响CAS系微晶玻璃析出的主晶相类型,但会使体系的析晶峰温度降低,促进体系析晶;在微晶玻璃高温熔融及热处理时,Ti4+会被还原成Ti3+,同时产生氧空位,Ti3+—O—Ti3+与氧空位缺陷间自旋角关联作用的强弱,直接影响抗弯强度的大小;间隙Ti4+的形成,造成缺陷和Al、Si空位的存在,使材料的物理化学性能发生改变.间隙Ti4+虽然造成缺陷和空位的存在,但Ti4+与O2-间通过静电作用,使原来相互独立的氧离子成为一体,键强增大,导致抗弯强度增大;当TiO2超过6%时,部分Ti4+取代Si4+,而Ti—O键比Si—O键键强小,导致抗弯强度减弱.在核化温度为750 ℃,核化时间为2 h,晶化温度为950 ℃,晶化时间为2 h,TiO2质量分数为6%时,CAS系微晶玻璃具有优良的力学性能,抗弯强度为314 MPa,显微硬度为830 MPa.
Abstract:
CaO-Al2O3-SiO2 system (CAS) glass-ceramics with anorthite crystal structure was prepared by melt-method. Its microstructure and morphology were characterized by differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscope (SEM). The effects of TiO2 content on the relationship between microstructure and mechanical properties for the CAS glass-ceramics were also investigated by electron paramagnetic resonance (EPR ) and the position annihilation technique (PAT). The results showed that the TiO2 content does not affect the type of the main crystalline phase of CAS glass-ceramics, but it could reduce the crystallization peak temperature and promote the crystallization. The relationship between g factor and bending strength showed that during the melting and heat-treatment process, part of the Ti4+ ions were reduced to Ti3+ and formed oxygen vacancies, the spin angular correlation between Ti3+—O—Ti3+ and oxygen vacancies affected the bending strength directly. The relationship between positron lifetime and bending strength showed that interval Ti4+ could make some defects and Al, Si vacancies, which could affect the mechanical properties. Electrostatic interaction between Ti4+ and O2- could make the independent oxonium ion into an integral, which was favourable to bending strength. When the TiO2 content was higher than 6%, some Si4+ were substituted by Ti4+, and the Ti—O bond was weaker than the Si—O bond, which led to a decrease in bending strength. When the content was 6%, the microhardness was 830 MPa,and the bending strength was 314 MPa in the heat treatment conditions of nucleation temperature 750 ℃,nucleation time 2 h, crystallization temperature 950 ℃,crystallization time 2 h.

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相似文献/References:

[1]刘汉桥,魏国侠,梁茵,等.配料对焚烧飞灰电弧炉熔渣晶化行为的影响[J].深圳大学学报理工版,2011,28(No.6(471-564)):559.
 LIU Han-qiao,WEI Guo-xia,LIANG Yin,et al.Effects of additive on crystallization behaviour of arc-molten slag from incinerator fly ash[J].Journal of Shenzhen University Science and Engineering,2011,28(No.3(221-330)):559.

备注/Memo

备注/Memo:
Received:2013-01-08;Accepted:2013-04-01
Foundation:National Natural Science Foundation of China (50974090); Shenzhen Science and Technology Plan Foundation (JC201105130413A)
Corresponding author:Professor Ren Xiangzhong. E-mail:renxz@szu.edu.cn
Citation:Ren Xiangzhong, Yi Xianwen, Zhang Yong, et al. Microstructure and mechanical properties of the CaO-Al2O3-SiO2 system glass-ceramics [J]. Journal of Shenzhen University Science and Engineering, 2013, 30(3): 319-324.(in Chinese)
基金项目:国家自然科学基金资助项目(50974090);深圳市科技研发资金资助项目(JC201105130413A)
作者简介:任祥忠(1973-),男(汉族), 山东省沂水县人,深圳大学教授. E-mail: renxz@szu.edu.cn
引文:任祥忠,易先文,章勇,等. 钙铝硅系微晶玻璃微观结构与力学性能研究[J]. 深圳大学学报理工版,2013,30(3):319-324.
更新日期/Last Update: 2013-05-19