铝硅比对燃煤炉渣发泡陶瓷的制备与性能的影响研究  

Effects of Al_(2)O_(3)/SiO_(2) mass ratio on the fabrication and properties of foamed ceramic prepared from coal bottom ash

作　　者：周明凯[1] 葛雪祥 ZHOU Mingkai;GE Xuexiang(School of Material Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Material Science and Engineering,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243032

出　　处：《新型建筑材料》2023年第1期79-83,89,共6页New Building Materials

基　　金：“十三五”国家重点研发计划项目(2018YFD1101000)。

摘　　要：以燃煤炉渣为主要原料,通过调控坯料中Al_(2)O_(3)与SiO_(2)含量,系统研究了铝硅比对发泡陶瓷烧成性能、孔结构、体积密度与抗压强度的影响,并通过物相组成分析,揭示了铝硅比对发泡陶瓷性能的影响机理。结果表明,尽管铝硅比增大将提高坯体的发泡温度,导致同一烧成温度制得的发泡陶瓷气孔率减小、体积密度增大,但拓宽了坯体的烧成温度范围,减弱了烧成温度对孔径的影响,并促使晶相量增加。若铝硅比大于0.6,将导致孔径分布变宽、孔结构劣化,降低材料的抗压强度。当坯料中的Al_(2)O_(3)与SiO_(2)总量约为82%,铝硅比为0.41时,可制备出孔结构优异的高强度炉渣发泡陶瓷。Foamed ceramics were prepared using coal bottom ash.The effects of Al_(2)O_(3)/SiO_(2) ratio on the sintering performance,pore structure,bulk density,and compressive strength of foamed ceramics were systematically studied by adjusting the content of the Al_(2)O_(3) and SiO_(2).Besides,the influencing mechanism of the Al_(2)O_(3)/SiO_(2) ratio on the properties of foamed ceramics was revealed through phase composition analysis.The results show that the increase in the Al_(2)O_(3)/SiO_(2) ratio will elevate the foaming temperature of the green body,resulting in a reduction of porosity and an increase in the bulk density of the foamed ceramic prepared at the same firing temperature.It widens the firing temperature range of the green body,weakens the influence of the firing temperature on the pore size,and increases the crystal phase amount in samples.Once the Al_(2)O_(3)/SiO_(2) ratio is greater than 0.6,the pore size distribution of the sample will be widened,and the pore structure will be deteriorated,which will harm the compressive strength of foamed ceramics.Therefore,when the total amount of the Al_(2)O_(3) and SiO_(2) is 82%,and the Al_(2)O_(3)/SiO_(2) ratio reaches 0.41,high-strength foamed ceramics with good pore structure can be prepared from coal bottom ash.

关 键 词：发泡陶瓷 铝硅比 燃煤炉渣 发泡性能 孔结构 

分 类 号：TU551.33[建筑科学—建筑技术科学]