【摘要】：以巖漿土、凝灰?guī)r和玻璃粉為主要原料,以碳化硅和稻草粉分別為發(fā)泡劑和造孔劑制備多孔吸音陶瓷。結(jié)合原料熱分析結(jié)果,運(yùn)用單因素研究法考查了燒結(jié)溫度、保溫時(shí)間、造孔劑用量、發(fā)泡劑用量、樣品厚度及顯氣孔率和孔徑對多孔陶瓷材料吸音性能的影響。采用XRD和超景深顯微技術(shù)對材料的晶相結(jié)構(gòu)和形貌進(jìn)行表征。結(jié)果表明,在燒結(jié)溫度1150℃、保溫時(shí)間50 min、發(fā)泡劑和造孔劑用量分別為原料質(zhì)量的1.4%和6%、樣品厚度30 mm時(shí)制備的材料性能最優(yōu),即在200~4000 Hz下材料平均吸音系數(shù)為0.34;此外,隨著樣品厚度的增加,第一吸收峰頻率由高頻向低頻方向移動。
[Abstract]:Porous acoustical ceramics were prepared from magmatic soil tuff and glass powder with silicon carbide and straw powder as foaming agent and pore-making agent respectively. Combined with the results of thermal analysis of raw materials, the effects of sintering temperature, holding time, amount of pore-making agent, amount of foaming agent, thickness of sample, apparent porosity and pore size on the sound absorption properties of porous ceramic materials were investigated by single factor method. The crystal structure and morphology of the material were characterized by XRD and hyperfield microscopy. The results show that when sintering temperature is 1150 鈩，

本文編號：2354998