Title: Synthesis of nanosized zirconium diboride powder with high purity via simply purified boron carbide

Authors: Jin Soon Han; Hyeon Seung Lee; Jae Rok Shin; Jae Uk Hur; Sung-Churl Choi; Hyeong-Jun Kim; YooJin Kim; Gye Seok An

Addresses: Division of Material Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea ' Division of Material Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea ' Division of Material Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea ' Division of Material Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea ' Division of Material Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea ' Engineering Ceramic Center, Korea Institue of Ceramic Engineering & Technology, 3321 Gyeongchung-daero, Sindun-myeon, Icheon 17303, South Korea ' Engineering Ceramic Center, Korea Institue of Ceramic Engineering & Technology, 3321 Gyeongchung-daero, Sindun-myeon, Icheon 17303, South Korea ' Division of Material Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea; Engineering Ceramic Center, Korea Institue of Ceramic Engineering & Technology, 3321 Gyeongchung-daero, Sindun-myeon, Icheon 17303, South Korea

Abstract: The purified B₄C was applied in ZrB₂ synthesis to remove B₂O₃ at the initial state, which causes an excess B₄C requirement and abnormal growth. B₄C showed decreasing oxygen content by washing time and was saturated at 0.22% after being washed five times. ZrO₂ and washed B₄C 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 B₄C 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 B₂O₃ liquid phase was observed in the SEM image and particle size distribution.

Keywords: ultra high-temperature ceramics; zirconium diboride; carbothermal/borothermal reduction; synthesis.

DOI: 10.1504/IJNT.2018.096342

International Journal of Nanotechnology, 2018 Vol.15 No.6/7, pp.518 - 527

Published online: 26 Nov 2018 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article