Effect of MnO content on the crystallization, physicochemical and dielectric properties of mica glass-ceramics. Issue 18 (15th September 2022)

• Record Type: Journal Article
• Authors: Liu, Lidan; Luo, Yinyi; Zhang, Qian; Ouyang, Yun; Ning, Tianxiang; Bai, Zhenhai; Lu, Anxian
• Is Part Of: Ceramics international. Volume 48:Issue 18(2022)
• Page Start: 26732
• Page End: 26741
• Publication Date: 2022-09-15
• Subjects: Mica glass-ceramics -- MnO doping -- Physical properties -- Chemical stability -- Dielectric properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.368
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: This paper has concentrated on the effect of partial substitution of MnO for MgO on the crystallization, physicochemical and dielectric properties of mica glass-ceramics. The results showed that MnO acted as a network modifier to diminish the network integrity. Fluorphlogopite (KMg3 (Si3 AlO10 ) F2 ) phase, as the dominant crystal phase, suggested that Mn 2+ ions did not participate in forming the mica phase. The crystallinity achieved the maximum (67.96%) at a MnO doping of 4 mol%. From SEM images, the conclusion that appropriate MnO doping could promote the formation of nuclei and refine the grains can be obtained. When the doping of MnO was 4 mol%, the Vickers hardness (4.59 GPa) of mica glass-ceramics was the lowest, while the bending strength (136.84 MPa) and chemical stability reached the best. The dielectric constant was about 7–8 at 1 MHz, and the dielectric loss remained relatively low.