氧化铝源对蒙脱石基陶瓷制备及其性能的影响

作者：Wu Xueping; He Qing; Wang Xin; Xiao Kesong; Zhang Xianlong

来源：Journal of the Chinese Ceramic Society, 2022, 50(9): 2439-2447.

DOI：10.14062/j.issn.0454-5648.20220096

• Alumina source
• Hot-pressing sintering
• Montmorillonite
• Mullitization

Hydroxy aluminum polycation was firstly prepared with AlCl3?6H2O and NaOH as raw materials, and then Al-pillared montmorillonite was prepared with hydroxy aluminum polycation as alumina source. A montmorillonite-based ceramic was fabricated via ball milling and hot pressing with Al2O3 and Al(OH)3 as alumina sources. The effect of hot-pressing temperature on the mullitization and mechanical properties of montmorillonite-based ceramic was investigated. The results show that the mechanical properties of montmorillonite-based ceramics are improved by adding three kinds of alumina sources at the hot-pressing temperature of 1 100 ℃. The optimum flexural strength and fracture toughness of Al-pillared montmorillonite-based ceramics at 1 300 ℃ (i.e., 118.07 MPa and 2.30 MPa?m1/2) can be obtained, which are increased by 41.0% and 74.2%, compared with original montmorillonite ceramics. ? 2022, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

• 单位
  合肥工业大学