Decomposition Free Al<sub>2</sub>TiO<sub>5-</sub>MgTi<sub>2</sub>O<sub>5</sub>Ceramics with Low-Thermal Expansion Coefficient

• 作者: Masahide Takahashi Masahiro Fukuda Toshinobu Yoko
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 化学
• 关键词: DIESEL PARTICULATE FILTERS Thermal Shock Resistance Aluminumtitanate Magnesium TITANATE
• 年，卷（期）: 2013,（4）
• 页码范围: 111-115
• 页数: 5页
• 分类号: O6

摘要

Solid solutions of (1 - x)Al2TiO5-xMgTi2O5 (x = 0 - 1) doped with alkaline feldspar were prepared. Thermal decomposition largely depends on the feldspar doping as same as the x value. It was found that decomposition free ceramics over 500 hours of heat treatment at 1100°C in an ambient atmosphere could be obtained for the feldspar-doped ceramics at x > 0.5 with a fracture strength of 33 - 40 MPa and coefficient of thermal expansion of 2.4 - 4.1 ×10-6K-1. A partial decomposition was observed for a compositional range of around x = 0.75. Both composition of the solid solution and an addition of the alkaline feldspar contributed synergistically to improve such thermal and mechanical properties. The decomposition free Al2TiO5-MgTi2O5 ceramics is expected for variety of high temperature applications including diesel particulate filters.