Elaboration and Characterization of Mullite Refractory Products from Moroccan Andalusite

• 作者: Abdelhak Arib Kacem El Abbassi Mostafa Sardy Moussa Gomina
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 化学
• 关键词: ANDALUSITE MULLITE REFRACTORY Structure MECHANICAL Properties
• 年，卷（期）: 2012,（3）
• 页码范围: 121-125
• 页数: 5页
• 分类号: O6

摘要

Enrichment of schist mined in Morocco resulted in an extract essentially made of andalusite, quartz and muscovite, which was investigated with the aim to synthesize mullite refractory materials. X-ray diffraction analysis was used to assess phase transformations upon heating at different temperatures. Mullite formation starts as early as 1200℃ and seems almost total at 1450℃. This process correlates with a weak shrinkage (3.5% at 1450℃) and the formation of an important glass phase. Green compacts obtained by unidirectional pressing the extract powder were heated under air in the temperature range 1200℃ - 1600℃. Chemical and mechanical properties of these materials were investigated and correlated with their microstructure.