Crystallization behaviors, thermo-physical properties and seal application of Li2O–ZnO–MgO–SiO2 glass-ceramics

• Published in: Journal of alloys and compounds Vol. 657; pp. 231 - 236
• Main Authors: Xiao, Zhuo-hao, Sun, Xin-yuan, Liu, Kun, Luo, Wen-yan, Wang, Yun-zhi, Luo, Min-hua, Han, Run-lin, Liu, Yan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.02.2016
• Subjects: High thermal expansion; Lithium zinc magnesium silicate glass-ceramic; Micro-hardness; Sealing test; Lithium zinc magnesium silicate glass-ceramic; Micro-hardness; High thermal expansion; Sealing test
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2015.10.106

Lithium zinc magnesium silicate glass ceramics were prepared by conventional melt-quenching technique and subsequently converted to glass-ceramics by a controlled nucleation and crystallization process. The nucleation and crystallization temperatures were determined by DSC curve. Crystalline phases were identified using powder X-ray diffraction technique and microstructures were observed by SEM images. The effects of heat treatment temperature on some thermo-physical properties, such as coefficient of thermal expansion (CTE), bend strength and Vickers micro-hardness of glass-ceramics were investigated in detail. The CTE, bend strength and micro-hardness of the optimized glass-ceramic is found to be 16.64 × 10−6 °C−1, 121.23 MPa and 6.65 GPa, respectively. The test on sealing to SUS310S stainless steel was also carried out as a possible application in filtration device to purify the dust-contained high temperature exhaust. •A novel glass-ceramic sealant for matched sealing to heat-resistant stainless steel (SUS310S) is developed.•The developed glass-ceramics have a wide thermal expansion coefficient ranged from 8.96 to 16.64 × 10−6 °C−1.•A filter module sealed with the glass-ceramic sealant has successfully served in the filter device for 9 months.