Effect of different nucleating agent ratios on the crystallization and properties of MAS glass ceramics. Issue 16 (December 2021)

• Record Type: Journal Article
• Authors: He, Dongfeng; Ma, Hui; Zhong, Hao
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 16(2021)
• Page Start: 342
• Page End: 350
• Publication Date: 2021-12
• Subjects: Glass ceramics -- Magnesium aluminosilicate -- Crystallization kinetics -- Nucleating agent; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.09.034
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: TiO2 +ZrO2 as nucleating agents promoted the precipitation of α-cordierite. Composite nucleating agents made the crystal phase become finer and dense. Composite nucleating agents improved the mechanical properties of MAS glass. Abstract: The effects of different kinds of nucleating agents on crystallization, microstructure and performances of Magnesium Aluminosilicate (MgO-Al2 O3 -SiO2, MAS) glass-ceramics which were fabricated by melting method in this study. Also, this paper systematically investigated the mechanism of glass stability, crystallization kinetics and element distribution of MAS glass-ceramics. Herein, we used three kinds of nucleating agents, which was TiO2, ZrO2 and composite nucleating agent (TiO2 /ZrO2 ). The results showed after the doping of nucleating agent, the content of α-cordierite was increased, the stability and crystallization kinetics of glass was changed, the precipitated crystal phase was finer and more compact. Wherein, the sample with composite nucleating agents (TiO2, ZrO2 ) has the best performance due to the highest contents of α - cordierite, uniform distribution of elements without agglomeration in the crystal phase and the most compact structure, whose Vickers hardness and bending strength can reach 9.70 GPa and 312 MPa, respectively.