An ultrathin high-performance heat spreader fabricated with hydroxylated boron nitride nanosheets. (10th March 2017)

• Record Type: Journal Article
• Authors: Fu, Li; Wang, Ting; Yu, Jinhong; Dai, Wen; Sun, Hongyan; Liu, Zhiduo; Sun, Rong; Jiang, Nan; Yu, Aimin; Lin, Cheng-Te
• Is Part Of: 2D materials. Volume 4:Number 2(2017)
• Publication Date: 2017-03-10
• Subjects: thermal conductivity -- heat spreader -- boron nitride nanosheets -- hydroxylation -- ultrathin; Graphene -- Periodicals; Materials science -- Periodicals; Nanostructured materials -- Periodicals; 620.115
• DOI: 10.1088/2053-1583/aa636e
• Languages: English
• ISSNs: 2053-1583

Abstract

Abstract: An ultrathin, highly thermally conductive heat spreader has been fabricated by layer-by-layer stacking of hydroxylated boron nitride nanosheets (HBNNS) for the first time. HBNNS were prepared by a molten hydroxide-assisted liquid exfoliation from hexagonal boron nitride powder. The as-prepared heat spreader of HBNNS exhibits a high thermal conductivity of 51.1 W m −1 K −1 along the in-plane direction, and can be further enhanced 14% by annealing for de-hydroxylation. This heat spreader with 10–30 µ m in thickness possessed excellent thermal stability with negligible weight loss at wide temperature range up to 700 °C, resulting in promising applications for heat dissipation in electronic components operated at high working temperature.