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Highly porous silica foams prepared via direct foaming with mixed surfactants and their sound absorption characteristics
Du, ZP; Yao, DX; Xia, YF; Zuo, KH; Yin, JW; Liang, HQ; Zeng, YP
2020-06-15
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Issue9Pages:12942
SubtypeArticle
AbstractThe highly porous silica ceramics were fabricated by direct foaming with mixed surfactants and the influence of silicon nitride addition and solid content on the microstructures and properties were investigated. The results showed that silicon nitride can impede the formation of cristobalite and facilitates the sintering of silica ceramics. When the addition of silicon nitride powders reached 15 wt%, the highest compressive strength of silica ceramic foams could be obtained. The porosity of silica ceramic foams was tailored in the range of 84.61%-91.35% by adjusting the solid content, and the compressive strength of the obtained ceramic foams ranged from 5.89 MPa to 0.94 MPa. Sound absorption characteristics of silica ceramics foams were investigated. With the porosity of ceramic foams increased from 84.61% to 91.35%, the sound absorption coefficients in the entire sound wave frequency were enhanced due to the reduction of flow resistances, besides, the sound absorption peak varied from 4200 Hz to 2300 Hz, and became more intense and sharper.
DOI10.1016/j.ceramint.2020.02.063
WOS KeywordSI3N4 CERAMICS ; MECHANICAL-PROPERTIES ; CELL STRUCTURE ; MICROSTRUCTURE ; FABRICATION ; STRENGTH ; PORES ; PMMA
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27973
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Du, ZP,Yao, DX,Xia, YF,et al. Highly porous silica foams prepared via direct foaming with mixed surfactants and their sound absorption characteristics[J]. CERAMICS INTERNATIONAL,2020(9):12942.
APA Du, ZP.,Yao, DX.,Xia, YF.,Zuo, KH.,Yin, JW.,...&Zeng, YP.(2020).Highly porous silica foams prepared via direct foaming with mixed surfactants and their sound absorption characteristics.CERAMICS INTERNATIONAL(9),12942.
MLA Du, ZP,et al."Highly porous silica foams prepared via direct foaming with mixed surfactants and their sound absorption characteristics".CERAMICS INTERNATIONAL .9(2020):12942.
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