Ultrasonic sprayed hollow ceramic/carbon microspheres function as thermal insulation, ablative resistance, and electromagnetic shielding materials

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

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.579

Chuhui Qin , Hangyu Zhong , Hongli Hu , Zhonglei Kang , Bo-xing Zhang

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引用次数: 0

Abstract

Hollow ceramic/carbon microspheres (HCCMs) have widespread applications for thermal insulation and ablative resistance materials in aerospace areas, attributed to their multiple advantages such as low density, low thermal conductivity, oxidation and high-temperature resistance. In this work, we fabricated HCCMs with diameters around 18–242 μm by the ultrasonic spray method, using mixed solutions of poly(acrylonitrile) (PAN), polyvinyl pyrrolidone (PVP), and preceramic polymers as starting materials. After optimizing the morphology of HCCMs, we introduced them as fillers into phenolic resin (PR). By adjusting the ratio between HCCMs and PR, the optimal properties were obtained at a loading content of 30 wt% of HCCMs. The density of as-obtained PR composite was 0.70 g/cm³, the thermal conductivity was 0.27 W/(m·K), and the maximum electromagnetic shielding effectiveness was 76.30 dB at the frequency of 8–12 GHz. This work develops a powerful approach to fabricating HCCMs, and demonstrates their typical application as fillers in PR to improve thermal insulation, electromagnetic shielding, and ablative resistance performance.

Abstract Image

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超声喷涂中空陶瓷/碳微球具有隔热、耐烧蚀、电磁屏蔽等功能

空心陶瓷/碳微球（HCCMs）具有密度低、导热系数低、耐氧化、耐高温等优点，在航空航天领域广泛应用于隔热和耐烧蚀材料。本文以聚丙烯腈（PAN）、聚乙烯吡咯烷酮（PVP）和预陶瓷聚合物的混合溶液为原料，采用超声波喷雾法制备了直径约为18-242 μm的hccm。优化HCCMs的形态后，将其作为填料引入酚醛树脂（PR）中。通过调整HCCMs与PR的比例，在HCCMs的添加量为30%时获得了最佳性能。得到的PR复合材料密度为0.70 g/cm3，导热系数为0.27 W/(m·K)，在8 ~ 12 GHz频率范围内的最大电磁屏蔽效能为76.30 dB。本工作开发了一种强大的制造hccm的方法，并展示了它们作为PR填料的典型应用，以改善隔热、电磁屏蔽和耐烧蚀性能。

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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.