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| 孔隙率和孔径对陶粒吸声材料吸声性能的影响 | |
| 引用本文： | 骆翔宇,李文芳,金雪莉,曾令可. 孔隙率和孔径对陶粒吸声材料吸声性能的影响[J]. 硅酸盐学报, 2011, 39(1): 158-163 |
| 作者姓名： | 骆翔宇 李文芳 金雪莉 曾令可 |
| 作者单位： | 1. 华南理工大学材料科学与工程学院,广州,510640;广州市建筑材料工业研究所有限公司,广州,510663 2. 华南理工大学材料科学与工程学院,广州,510640 3. 亚热带建筑科学国家重点实验室,华南理工大学建筑节能研究中心,广州,510640 |
| 基金项目： | 国家自然科学基金，华南理工大学中央高校基本科研业务费专项资金 |
| 摘 要： | 用流阻法和显微分析法定量表征材料的孔隙状况,研究以陶粒为主要骨料的多孔吸声材料在不同有效孔隙率和中值孔径下的吸声性能.结果表明陶粒吸声材料的NRC随着流阻的增加先增后减,当流阻为1144.07Pa·s/m3,材料吸声性能达到最佳:材料的中值孔径在0.71～1.44mm这一范围,当其减少时,吸声性能降低:随着有效孔隙率的... |
| 关 键 词： | 陶粒多孔材料 流阻 孔隙率 中值孔径 吸声性能 |
Effects of Porosity and Pore Size on Sound Absorption Characteristic of Ceramisite Porous Material |
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| LUO Xiangyu,LI Wenfang,JIN Xueli,ZENG Lingke. Effects of Porosity and Pore Size on Sound Absorption Characteristic of Ceramisite Porous Material[J]. Journal of The Chinese Ceramic Society, 2011, 39(1): 158-163 | |
| Authors: | LUO Xiangyu LI Wenfang JIN Xueli ZENG Lingke |
| Affiliation: | 1(1.College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640;2.Guangzhou Building Materials Institute Co.,Ltd.,Guangzhou 510663;3.State Key Laboratory of Subtropical Building Science, South China University of Technology Building Environment Energy Laboratory,Guangzhou 510640,China) |
| Abstract: | The methods of air-flow resistivity and microscopic analysis were used to quantitatively characterize the porosity of the porous materials and investigate the sound absorption of the porous sound-absorbing materials like ceramsite as an aggregate at different porosities or median pore diameters. The results show that the noise reduction coefficient (αNRC) of the ceramsite sound-absorbing material increases at the beginning and then decreases with increasing the air-flow resistivity at the sound absorption of 1144.07 Pa-s/m3. The sound absorption decreased with decreasing the median pore diameter in the size range of 0.71-1.44 mm. The aNRC could increase with the increase of the effective porosity. The high-frequency sound absorption was more sensitive to the changes of the internal porosity of the material. |
| Keywords: | ceramsite porous materials air-flow resistivity porosity median pore diameters sound absorption characteristics |
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