摘要
在堇青石化学计量组分和非堇青石化学计量组分中分别添加B_(2)O_(3),通过玻璃粉末烧结法制备玻璃陶瓷,并研究了玻璃陶瓷的性能,包括非等温析晶动力学、热学、力学和介电性能。本研究使用非堇青石化学计量组分制备了α-堇青石基玻璃陶瓷,并加入B_(2)O_(3)促进α-堇青石析出,提高MgO-Al_(2)O_(3)-SiO_(2)玻璃的结晶能力。玻璃成分中过量的MgO和SiO_(2)不会影响玻璃的析晶能力,但会影响析晶的类型;增加B_(2)O_(3)含量可以制备低热膨胀系数的α-堇青石基玻璃陶瓷,但会降低玻璃陶瓷的软化点。此外,增加B_(2)O_(3)含量还可以提高玻璃陶瓷的致密性和强度。α-堇青石基玻璃陶瓷的最大抗弯强度、弹性模量、断裂韧性和体积密度分别为(42.4±3.0)MPa、(34.0±2.9)GPa、(0.7±0.15)MPa·m^(1/2)和1.53g/cm^(3)。制备的α-堇青石基玻璃陶瓷表现出良好的介电性能(介电常数低至3.5),热膨胀系数低至4.22×10^(-6)K^(-1)。
The resulting glass-ceramics were prepared by glass powder sintering using stoichiometric and non-stoichiometric cordierite components with addition of B_(2)O_(3).Properties of the glass-ceramics,including the nonisothermal crystallization kinetics,thermal,mechanical and dielectric properties were investigated.Theα-cordierite based glass-ceramics can be easily prepared by using non-stoichiometric cordierite components,and B_(2)O_(3)addition can promote the precipitation ofα-cordierite and improve the crystallization ability of the MgO-Al_(2)O_(3)-SiO_(2)glass.Moreover,rich Mg O and SiO_(2)in the glass composition did not affect the crystallization ability of the glass,but affect the type of precipitated crystal phase.The increase of B_(2)O_(3)addition can prepareα-cordierite based glass-ceramics with a low coefficient of thermal expansion(CTE),but it also lower its softening point.In addition,the increase of B_(2)O_(3)addition can also improve the compactness and mechanical strength of the glass-ceramics.The maximum flexural strength,elastic moduli,fracture toughness and bulk density ofα-cordierite based glass-ceramics are(42.4±3.0)MPa,(34.0±2.9)GPa,(0.7±0.15)MPa·m^(1/2),and 1.53 g/cm^(3),respectively.And the as-preparedα-cordierite based glass-ceramics show good dielectric properties(εas low as 3.5)with a low CTE of 4.22×10^(-6)K^(-1).
作者
孙扬善
杨治华
蔡德龙
张正义
柳琪
房树清
冯良
石丽芬
王友乐
贾德昌
SUN Yangshan;YANG Zhihua;CAI Delong;ZHANG Zhengyi;LIU Qi;FANG Shuqing;FENG Liang;SHI Lifen;WANG Youle;JIA Dechang(State Key Laboratory of Advanced Technology for Float Glass,CNBM Research Institute for Advanced Glass Materials Group Co.,Ltd,Bengbu 233000,China;Key Laboratory of Advanced Structrual-Functional Integration Materials&Green Manufacturing Technology,Harbin Institute of Technology,Harbin 150001,China;Silica-based Materials Laboratory of Anhui Province,Bengbu 233000,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第12期1351-1357,共7页
Journal of Inorganic Materials
基金
Anhui Provincial Natural Science Foundation(Youth Project)(2008085QE248)
Key Research and Development Projects of Anhui Province(202004a05020061,202004a05020036)
The 6th China Association for Science and Technology“Young Talent Support Project”。
关键词
α-堇青石
玻璃陶瓷
粉末烧结
析晶动力学
力学性能
介电性能
α-cordierite
glass-ceramics
powder sintering
crystallization kinetics
mechanical property
dielectric property
