空心微珠轻质陶粒的制备与性能  

Preparation and Properties of Lightweight Ceramsite Made by Hollow Microspheres

作　　者：李志君[1] 苏振国[2] 李亮[3] 米海惠 孟文清[1] 黄勇[2] 杨金龙[1,2] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]清华大学材料学院新型陶瓷与精细工艺国家重点实验室,北京100084 [3]吉林大学材料科学与工程学院,长春130025

出　　处：《硅酸盐学报》2017年第3期384-392,共9页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51572140)

摘　　要：以煤矸石空心微珠和玻璃空心微珠坯体为主要原料,采用滚动成球法制备陶粒生坯,经烘干、烧结,得到轻质陶粒,研究了烧结温度、保温时间以及玻璃粉添加量对空心微珠轻质陶粒性能的影响。结果表明:随着烧结温度的升高,陶粒的表观密度和吸水率逐渐增大,颗粒抗压强度先增大后逐渐减小;烧结温度为700℃,单颗粒抗压强度为200.5 N,达到最大值。随着保温时间的延长,颗粒抗压强度先增大后减小。加入玻璃粉可以明显提高陶粒的单颗粒抗压强度,并且随着玻璃粉加入量的增大,颗粒抗压强度显著增大,700℃烧结的样品中玻璃粉加入量为25%(质量分数)时,单颗粒抗压强度增大到327.5 N,提高了63.3%。The lightweight ceramsite was prepared with hollow microspheres in coal gangue and green glass hollow microspheres as raw materials. After the pelletized green bodies are dried and sintered, the lightweight ceramsite was obtained. The influences of sintering temperature, holding time and glass powder content on the properties of lightweight ceramsite were investigated. The results show that the apparent density and water absorption rate of ceramsite increase gradually while the compressive strength firstly increases and then decreases with the increase of sintering temperature. When the ceramsite is sintered at 700℃, the maximum compressive strength （i.e., 200.5 N） is obtained. The compressive strength of the ceramsite firstly increases and then decreases as the holding time increases. Adding glass powder can improve the compressive strength. The compressive strength increases with the increase of glass powder content. The compressive strength of ceramsite with a glass powder content of 25% （in mass fraction） sintered at 700 ℃ is 327.5 N, which is increased by 63.3%, compared to that of ceramsite without any glass powder.

关 键 词：煤矸石空心微珠 玻璃空心微珠 表观密度 颗粒抗压强度 

分 类 号：TB32[一般工业技术—材料科学与工程]