Enhanced sound absorption properties of porous ceramics modified by graphene oxide films |
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Authors: | Chao He Bin Du Juan Ma Hao Xiong Junjie Qian Mei Cai Anze Shui |
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Affiliation: | School of Materials Science and Engineering, South China University of Technology, Guangzhou, P.R. China |
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Abstract: | Under the condition of constant thickness, improving the low-frequency sound absorption performance of conventional sound-absorbing materials is a challenging research topic. To address this issue, a new reduced graphene oxide/polyvinyl alcohol (RGO/PVA) porous composite ceramic was fabricated using freeze-drying and optimized by redesigning the internal connecting pores of porous ceramic matrixes with a reticular microstructure using RGO and PVA. The as-prepared porous structure showed significant enhancement in the low-frequency sound absorption band compared with pristine porous ceramics. In addition, the hybrid porous ceramics exhibited low thermal conductivity. These favorable properties indicate that the hybrid sound-absorbing ceramics have potential application prospects for noise reduction in the fields of construction and electrical and mechanical devices. |
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Keywords: | composite porous ceramics graphene oxide low-frequency sound absorption |
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