The influence of sintering parameters and aluminum nitride powder characteristics on the microstructure and thermal conductivity of aluminum nitride ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-02-01 DOI:10.1016/j.ceramint.2024.12.075

Zhiqiang Chen , Congmin Xu , Liang Wang , Panpan Du , Yingying Shi , Guoliang Xue , Zheng Wang , Chongbo Xie , Yunting Hou , Xiaolong Pan , Yusheng Zhang

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Abstract

Aluminum nitride (AlN) ceramics have been widely used as heat dissipation materials in integrated circuits and electronic devices. The characteristics of AlN powder and sintering process parameters play significant roles on the microstructure of AlN ceramics and further determine the thermal conductivity. Herein, AlN powders with different particle size were synthesized by subtly tuning the reaction conditions. Then the influence of sintering temperature, holding time, sintering additive amount on the microstructure and thermal conductivity of AlN ceramics were systematically studied. Finally, the powder characteristics on the property of AlN ceramics were compared. AlN powder with small particle size had high sintering activity and benefited the grain growth, but the oxygen content increased to produce more second phases, which affected the thermal conductivity. The thermal conductivity of ceramics is affected by lattice O, grain boundary, grain-boundary impurities, etc. A series of AlN ceramics with thermal conductivity >200 W m⁻¹ K⁻¹ were prepared using self-made powder.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.

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yttrium oxide