Sirui Cao, Yunhui Dou, Yufeng Jiao, Shujuan Liu, Dongmei Liu, Meili Qi, Ming Hu
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引用次数: 0
摘要
采用传统的溶胶-凝胶法和炭化技术制备了硅酸铝陶瓷纤维增强酚醛树脂基碳气凝胶复合材料。实验结果表明，将PR湿凝胶在室温下干燥，得到形貌稳定的碳气凝胶。反应物配比影响了碳气凝胶的微观结构和整体性能。当酚醛树脂与固化剂的质量比为8:1时，所得碳气凝胶样品的总放电容量保持在330 mAh g−1。在固化反应过程中引导气凝胶颗粒的生长。在PR/CF中形成了以陶瓷纤维为核心的三维网络结构。陶瓷纤维抑制了试样的收缩率，提高了试样的力学性能。
In this work, phenolic resin (PR) -based carbon aerogel composites reinforced with aluminum silicate ceramic fibers were obtained using the conventional sol-gel method with the carbonization technique. The experiment results showed that carbon aerogel with stable morphology was obtained by drying the PR wet gel at room temperature. Reactant ratios affected the microstructure and overall performance of carbon aerogels. The overall discharge capacity of the obtained carbon aerogel specimens was maintained at 330 mAh g−1 when the mass ratio of phenolic resin to curing agent was 8:1. The growth of aerogel particles was guided during the curing reaction. A three-dimensional network structure with ceramic fibers as the core was formed in PR/CF. The ceramic fibers suppressed the shrinkage of the samples, and the ceramic fibers improved the mechanical properties of the samples.
期刊介绍：
While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including:
-insulating to metallic and fast ion conductivity
-piezo-, ferro-, and pyro-electricity
-electro- and nonlinear optical properties
-feromagnetism.
When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice.
The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.
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