Hexagonal Boron Nitride Crystal Growth in the Li3BN2-BN System

IF 7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Chemistry of Materials Pub Date : 2024-09-25 DOI:10.1021/acs.chemmater.4c0199510.1021/acs.chemmater.4c01995

Camille Maestre*, Philippe Steyer, Bérangère Toury, Catherine Journet* and Vincent Garnier,

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引用次数: 0

Abstract

Hexagonal boron nitride (hBN) presents valuable intrinsic properties and attracts considerable attention for the development of novel two-dimensional (2D) materials-based technologies. Even though huge efforts have been made to improve the bottom-up synthesis of integrated and high quality hBN, the devices presenting the best performances are still made using hBN exfoliated from bulk crystals. In this context, we explore the Polymer-Derived Ceramics (PDC) route coupled to a high temperature process that produces millimetric and high quality hBN crystals. By investigating the (micro)structure of several samples, we demonstrate that the crystal growth occurs by segregation from a Li₃BN₂-BN solution upon cooling and from hBN seeds. In particular, we show that crystallization can occur at a temperature as low as 1400 °C. Overall, these results show that hBN crystal growth in the Li₃BN₂-BN system is compatible with conventional flux methods that may be the most promising platform for continuous seeded hBN crystal growth.

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Li3BN2-BN 系统中的六方氮化硼晶体生长

六方氮化硼（hBN）具有宝贵的内在特性，在开发基于新型二维（2D）材料的技术方面备受关注。尽管人们在改进自下而上合成一体化高质量六方氮化硼（hBN）方面做出了巨大努力，但具有最佳性能的设备仍然是使用从块状晶体剥离的六方氮化硼制成的。在此背景下，我们探索了聚合物衍生陶瓷（PDC）路线，并将其与高温工艺相结合，从而生产出毫米级的高质量氢化硼晶体。通过研究几个样品的（微）结构，我们证明了晶体生长是通过从冷却后的 Li3BN2-BN 溶液和 hBN 种子中分离出来的。特别是，我们发现结晶可在低至 1400 °C 的温度下发生。总之，这些结果表明，Li3BN2-BN 系统中的 hBN 晶体生长与传统的通量方法兼容，可能是最有希望实现连续种子 hBN 晶体生长的平台。

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来源期刊

Chemistry of Materials 工程技术-材料科学：综合

CiteScore

14.10

自引率

5.80%

发文量

929

审稿时长

1.5 months

期刊介绍： The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.