Synthesis of Hexagonal Columnar ZrB2 Powders Through Dissolution-Recrystallization Approach by Microwave Heating Method

Hexagonal Columnar ZrB2 powders were obtained from irregular commercial powder at low temperature using microwave heating technique. It was confirmed that the raw ZrB2 powders first underwent dissolution process in the glassy coating, followed by re-crystallization. A growth mechanism involving selective attachment is proposed to explain the formation of the hexagonal tubules