Synthesis of nanosized zirconium diboride powder with high purity via simply purified boron carbide. (2018)

• Record Type: Journal Article
• Authors: Han, Jin Soon; Lee, Hyeon Seung; Shin, Jae Rok; Hur, Jae Uk; Choi, Sung-Churl; Kim, Hyeong-Jun; Kim, YooJin; An, Gye Seok
• Is Part Of: International journal of nanotechnology. Volume 15:Number 6/7(2018)
• Page Start: 518
• Page End: 527
• Publication Date: 2018
• Subjects: ultra high-temperature ceramics -- zirconium diboride -- carbothermal/borothermal reduction -- synthesis; 620.505
• Languages: English
• ISSNs: 1475-7435

Abstract

The purified B4 C was applied in ZrB2 synthesis to remove B2 O3 at the initial state, which causes an excess B4 C requirement and abnormal growth. B4 C showed decreasing oxygen content by washing time and was saturated at 0.22% after being washed five times. ZrO2 and washed B4 C were heat-treated at 1250°C for 1 h for synthesis using carbothermal/borothermal reduction. With a crystallographic and elemental analysis of the synthesised particle, the optimised ZrO2 and B4 C molar ratio range was selected as 0.83 to 0.87 and washed five times. The synthesised particles measured 103.0 mm to 199.9 nm at various molar ratios. However, no change in the morphology due to the B2 O3 liquid phase was observed in the SEM image and particle size distribution.