In-situ synthesis of magnesium aluminate spinel - Zirconium diboride composite powder in magnesium chloride melt

作者：Liu, Xueyin^*; Li, Kezhuo; Bao, Ke; Chen, Junfeng; Zhang, Haijun; Zhang, Shaowei^*

来源：Ceramics International, 2022, 48(8): 11869-11871.

DOI：10.1016/j.ceramint.2022.02.107

• MgAl2O4
• ZrB2
• MgCl2
• Molten salt synthesis
• Composite powder
• Mechanism

Phase pure MgAl2O4-ZrB2 composite powder was successfully synthesized at 1200 ? for 4 h from ZrO2, B2O3, and Al, in molten MgCl2 which acted as not only an Mg-bearing reactant but also a liquid reaction medium. Mediated by such a liquid medium, Al initially reduced B(2)2O(3), forming B and Al2O3 which further reacted with ZrO2 and MgCl2, forming ZrB2 and MgAl2O4, respectively. As prepared powder comprised angular MgAl2O4 grains with sizes from-100 mu m to-2 mu m, and ZrB2 particles of-100 nm in average. The molten salt synthesis strategy demonstrated here is believed to be universally applicable to preparations of a range of MgAl2O4-boride composite powders for future in-depth exploration.

• 单位
  衢州学院