| 학회 | 한국재료학회 |
| 학술대회 | 2015년 가을 (11/25 ~ 11/27, 부산 해운대그랜드호텔) |
| 권호 | 21권 2호 |
| 발표분야 | B. 나노화학/바이오 재료 |
| 제목 | Preparation and Characterization of Hexagonal Boron Nitride Nanosheets by Low Temperature Heat Treatment |
| 초록 | Hexagonal boron nitride (h-BN) has been of an issue material due to its appealing good properties with a wide band gap, robust elastic modulus, a low frictional resistance, high thermal conductivity and strong oxidation stability. These intriguing and specific properties of h-BN has triggered a wide range of applications into cosmetics, a heat dissipation filler and lubricant additives used at high temperatures. Various approaches have been employed to synthesize such a layered insulating ceramic, including chemical vapor deposition (CVD), conversion method, solid-state reaction and combustion method. The CVD process has been widely used for a large-scale production of h-BN through a high-temperature vapor-phase reaction with the starting precursors of boron compounds and ammonia gas as a nitrogen source. However, the high-temperature and/or vacuum-assisted CVD method to vaporize toxic reactants, such as boron trifluoride, boron trichloride or diborane, has been suffered from disadvantageous terms of time-consuming processes, expensive facilities and releasing toxic by-products. In this study, a simple fabrication for cost-efficient massive production of h-BN nanosheets was investigated. The h-BN nanosheets were fabricated by relatively lower temperature calcination than CVD process. And exfoliation of h-BN was optimized by using shear stress in solvent. The h-BN nanosheets were characterized by X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and atomic force microscopy (AFM). |
| 저자 | Seil Kim, Sung-Oong Kang, Seunghan Ryu, Yong-Ho Choa, Yoseb Song |
| 소속 | 한양대 |
| 키워드 | Hexagonal boron nitride; Nanosheet; Synthesis |
