Synthesis of near-spherical BN powders by templated carbothermal reduction and nitridation

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-09-16 DOI:10.1111/jace.20138

Dengke Zhao, Zhaobo Tian, Songmo Du, Shuo Zhao, Binbin Fan, Shijia Zhang, Bohan Wang, Fei Li, Wenbin Cao, Kexin Chen, Guanghua Liu

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Abstract

Boron nitride (BN) powders with near-spherical particles of more than 10 µm were synthesized by templated carbothermal reduction and nitridation. The effects of processing factors, such as raw material mixing methods, C/B₂O₃ molar ratios, and carbon templates, were systematically studied, and the reaction mechanism was discussed. The experimental results showed that the integrity and morphology of the carbon templates was usually destroyed during ball milling or grinding, but preserved during magnetic stirring. The morphology of synthesized BN particles depended on the C/B₂O₃ molar ratio in starting reactant mixtures and gradually changed from sheet-like to near-spherical shape with decreasing C/B₂O₃ molar ratio. The morphology and size of synthesized BN particles agreed with that of the carbon templates, which means that the morphology and size of synthesized BN particles can be tailored by controlling that of the carbon template. The BN near-spherical particles synthesized in this work may be used as thermally conductive fillers for electronic packaging.

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通过模板化碳热还原和氮化合成近球形 BN 粉末

通过模板化碳热还原和氮化反应合成了近球形颗粒大于 10 µm 的氮化硼（BN）粉末。系统研究了原料混合方法、C/B2O3 摩尔比和碳模板等加工因素的影响，并讨论了反应机理。实验结果表明，碳模板的完整性和形态通常在球磨或研磨过程中被破坏，但在磁力搅拌过程中得以保留。合成的 BN 粒子的形态取决于起始反应物混合物中的 C/B2O3 摩尔比，随着 C/B2O3 摩尔比的降低，其形态逐渐从片状变为近似球形。合成的 BN 粒子的形态和大小与碳模板一致，这意味着可以通过控制碳模板的形态和大小来定制合成的 BN 粒子。本研究合成的 BN 近球形颗粒可用作电子封装的导热填料。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.