Modification of barium aluminosilicate glass-ceramics with zirconium oxide additives

• Published in: IOP conference series. Materials Science and Engineering 2020-05, Vol.848 (1), p.12013
• Main Authors: Chaynikova, A S, Kovaleva, V S, Zabelin, D A, Belachenkov, I O, Modin, S Y
• Format: Article
• Language: English
• Subjects: Additives; Aluminosilicates; Aluminum silicates; Barium; Barium aluminum silicate; Gelation; Glass ceramics; Metastable phases; Sintering; Sol-gel processes; Synthesis; Yttrium oxide; Zirconium; Zirconium dioxide; Zirconium oxides
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/848/1/012013

Barium aluminosilicate glass-ceramics modified with zirconium oxide (ZrO2) in the presence and without of stabilizing yttrium oxide was synthesized by the sol-gel method. The influence of the concentration of zirconium oxide on gelation, phase formation and sintering of materials were investigated. It was found that modification with zirconium oxide leads to a reduction in the gelation time of the initial solutions. It was shown that the introduction of ZrO2 in an amount of up to 10 wt.% leads to the intensification of sintering of glass-ceramics. However, with a further increase in the ZrO2 content to 15 wt.%, it is necessary to increase the sintering temperature to 1600°C. But this is not permissible, since it leads to not a desired metastable phase - hexacylsian becoming predominant in all samples. Only glass-ceramics modified with 10 wt.% ZrO2 contains only the monocelsian phase in the entire sintering temperature range. The use of the sol-gel method made it possible to synthesize glass-ceramics with a fine-crystalline structure and a uniform volume distribution of ZrO2 grains.