Abstract: In order to prepare low-cost ceramic foams with low water absorption and high compressive strength,waste glass was used as the main raw material,kaolin as the auxiliary raw material,and SiC as the foaming agent to prepare foam ceramics through mixing,pressing and sintering.The effects of holding times (0,20,40,60 and 80 min),SiC extra-additions (0.1%,0.3%,0.5%,0.7% and 0.9%,by mass) and heat treatment temperatures (1 120,1 140,1 160,1 180 and 1 200 ℃) on the apparent morphology,bulk density,water absorption,and compressive strength of the foam ceramics were investigated.The results show that:(1)with the heat treatment temperature rising and the holding time prolonging,the average diameter and water absorption of the foam ceramics first increase and then decrease,while the bulk density and the compressive strength decrease first and then increase;(2)increasing the SiC extra-addition will increase the average diameter and water absorption of the sample,and decrease the bulk density and compressive strength;(3)when the heat treatment temperature is 1 140 ℃,the holding time is 40 min,and the SiC extra-addition is 0.5%,the sample exhibits the best comprehensive performance,with the bulk density of 0.86 g·cm^-3,water absorption of 0.5%,and compressive strength of 13.6 MPa.

Key words: waste glass, kaolin, foam ceramics, compressive strength, water absorption

摘要： 为制备低成本兼具低吸水率和高抗压强度的泡沫陶瓷,以废玻璃为主要原料,高岭土为辅助原料,SiC为发泡剂,经混料、加压、烧结制备泡沫陶瓷。研究保温时间(0、20、40、60和80 min)、SiC掺量(加入质量分数分别为0.1%、0.3%、0.5%、0.7%和0.9%)和热处理温度(1 120、1 140、1 160、1 180和1 200 ℃)对泡沫陶瓷表观形貌、体积密度、吸水率和抗压强度的影响。结果表明:1)随着热处理温度和保温时间的不断增加,泡沫陶瓷的平均直径和吸水率先增大后减小,体积密度和抗压强度则是先减小后增大;2)增加SiC掺量会导致平均直径和吸水率增加,体积密度和抗压强度降低;3)当热处理温度为1 140 ℃、保温时间为40 min、SiC掺量为0.5%(w)时,试样的综合性能最佳,其体积密度为0.86 g·cm^-3,吸水率为0.5%,抗压强度为13.6 MPa。

关键词: 废玻璃, 高岭土, 泡沫陶瓷, 抗压强度, 吸水率