- 目录
- 保温材料与建筑节能
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铝硅比对燃煤炉渣发泡陶瓷的制备与性能的影响研究
作者：周明凯1，葛雪祥1，2
（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）
摘要：以燃煤炉渣为主要原料，通过调控坯料中Al2O3与SiO2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Al2O3与SiO2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。
关键词：发泡陶瓷；铝硅比；燃煤炉渣；发泡性能；孔结构
中图分类号：TU55+1.33 文献标识码：A 文章编号：1001-702X（2023）01-0079-05
Effects of Al2O3/SiO2 mass ratio on the fabrication and properties of foamed ceramic prepared from coal bottom ash
ZHOU Mingkai1，GE Xuexiang1，2
（1.School of Material Science and Engineering，Wuhan University of Technology，Wuhan 430070，China；
2.School of Material Science and Engineering，Anhui University of Technology，Maanshan 243032，China）
Abstract：Foamed ceramics were prepared using coal bottom ash. The effects of Al2O3/SiO2 ratio on the sintering performance， pore structure，bulk density，and compressive strength of foamed ceramics were systematically studied by adjusting the content of the Al2O3 and SiO2. Besides，the influencing mechanism of the Al2O3/SiO2 ratio on the properties of foamed ceramics was revealed through phase composition analysis. The results show that the increase in the Al2O3/SiO2 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 Al2O3/SiO2 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 Al2O3 and SiO2 is 82%，and the Al2O3/SiO2 ratio reaches 0.41，high-strength foamed ceramics with good pore structure can be prepared from coal bottom ash.
Key words：foamed ceramics，alumina to silica ratio，coal bottom ash，foaming property，pore structure