摘要
通过模压法成功制备轻质多孔陶瓷吸声材料,采用JTZB吸声系数测试系统研究造孔剂粒径、含量以及样品厚度对多孔陶瓷材料吸声性能的影响。结果表明:造孔剂含量为50vol%时,大孔径多孔陶瓷吸声性能优于小孔径多孔陶瓷;随着造孔剂含量的增加,第一吸收峰从低频向高频移动,峰值从0.41增加到0.82,孔隙率过高和过低都不利于提高材料吸声性能;样品厚度从10 mm增加到30 mm,第一吸收峰逐渐向着低频方向移动;造孔剂含量为60vol%,样品厚度为20 mm时,样品整体具有优异吸声性能,并逐层在其背后加入空腔发现,随着空腔层数的增加,样品的第一吸收峰从高频向低频移动,平均吸声系数逐渐增大。
Light weight porous ceramics were successfully prepared by conventional mold. Effects of particle sizes, content of pore-forming agent and sample thickness on sound absorption performance of porous ceramics were studied by means of JTZB absorption coefficient measurement. The results indicate that when pore-forming agent content is 50vol%, sound absorption performance of macroporous ceramics is better than that of microporous ones. As the pore-forming agent content increases, the sound absorption peak moves from low frequency to high frequency, with the peak value increasing from 0.41 to 0.82. Neither high nor low porosity can improve the sound absorption material performance. The first sound absorption peak gradually moves towards the low frequency when sample thickness increasing from 10 mm to 30 mm. The sample obtains super sound absorption performance when pore-forming agent content is 60vol% and sample thickness is 20 mm. By adding cavity layer to the porous ceramics rear one by one, the sound absorption peak moves from high frequency to low frequency and the average sound absorption coefficient gradually increases with the increase of cavity layer number.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第8期860-864,共5页
Journal of Inorganic Materials
基金
北京师范大学校测试基金(c16)~~
关键词
多孔陶瓷
吸声系数
模压法
porous ceramic
sound absorption coefficient
molding-pressing method
