烧成制度对制备煤矸石发泡陶瓷性能的影响  

Study on the effect of sintering system on the properties of coal gangue foamed ceramics

作　　者：代晨阳 嵇鹰[1] 朱刚 王瑞琦 李恩尧 沙倩倩 DAI Chenyang;JI Ying;ZHU Gang;WANG Ruiqi;LI Enrao;SHA Qianqian(School of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;China Building Materials Industrial Construction Xi'an Engineer Co.Ltd.,Xi'an 710075,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]中国建筑材料工业建设西安工程有限公司,陕西西安710075

出　　处：《新型建筑材料》2024年第12期13-19,31,共8页New Building Materials

基　　金：陕西省重点自然科学基金项目(2019TSLGY05-04)。

摘　　要：为实现固体废弃物高附加值资源化利用,在确定配方m(煤矸石)∶m(钢渣)∶m(钾长石)∶m(滑石)=50∶30∶10∶10,及外掺0.1%SiC的基础上,研究烧成制度对发泡陶瓷物相组成、表观形貌、物理性能及微观形貌的影响。结果表明:烧成温度影响高温时的液相量,从而对发泡陶瓷的气孔结构和物理性能造成影响;升温速率影响高温时液相生成的速率;保温时间影响高温时的液相量和气体量。以2℃/min的升温速率从1150℃(液相出现)烧至1170℃后保温60 min,在此烧成制度下,液相生成速率与SiC分解速率相匹配,制备的发泡陶瓷性能最佳,此时试样的体积密度0.53 g/cm^(3),抗弯强度5.32 MPa,吸水率6.43%,总气孔率77.92%,闭气孔率74.51%。To achieve high value-added resource utilization of solid waste,based on the determined formula as m(coal gangue)∶m(steel slag)∶m(potassium feldspar)∶m(talc)=50∶30∶10∶10 mixed with 0.1%SiC,the effect of sintering system on the phase composition,apparent morphology,physical properties and microscopic morphology of foamed ceramic were investigated.The results show that the sintering temperature affects the liquid phase at high temperature and thus affects the stomatal structure and physical properties of foaming ceramics.The heating rate affects the rate of liquid phase formation at high temperature.The soaking time not only affects the liquid phase volume at high temperature,but also affects the gas volume.Sintering system is heating from 1150℃(liquid phase)at 2℃/min to 1170℃for 60 min.Foamed ceramic samples prepared under this sintering system have the best performance,because of the matching of the liquid phase generation rate and the SiC decomposition rate.The bulk density of the sample at this time is 0.53 g/cm^(3),the bending strength is 5.32 MPa,the water absorption rate is 6.43%,the total porosity is 77.92%,and the closed porosity is 74.51%.

关 键 词：煤矸石 钢渣 发泡陶瓷 烧成制度 物理性能 

分 类 号：TU331.33[建筑科学—结构工程]