以蔗糖为结合剂制备ZrN-SiAlON-SiC复相耐火材料  

Preparation of ZrN-SiAlON-SiC composite refractories with sucrose as bonding agent

作　　者：张之介 吴小文[1,2] 刘佳[1,2] 赵航[1,2] 黄朝晖[1,2] 刘艳改[1,2] 房明浩[1,2] 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]非金属矿物与固废资源材料化利用北京市重点实验室,北京100083

出　　处：《耐火材料》2016年第5期340-343,共4页Refractories

基　　金：国家自然科学基金资助项目(51372232;51472222)

摘　　要：为降低耐火材料对大气的污染,保护环境,以天然锆英石、中低品位铝矾土和Si C粉为主要原料,首先将锆英石和中低品位铝矾土按质量比为9 1配料在N2气氛中于1 600℃保温3 h碳热还原氮化合成Zr N-Si Al ON粉体;然后选用蔗糖为环保型碳质结合剂,以60%(w)的Si C粉和40%(w)的Zr N-Si Al ON粉体,经150℃烘干后制备了Zr N-Si Al ON-Si C复相耐火材料,并研究了蔗糖外加量(外加质量分数分别为4%、8%、12%和16%)对复相材料经150℃烘干和1 500℃热处理后材料性能的影响。结果表明:当蔗糖外加量为12%(w)时,经过150℃烘干后的Zr N-Si Al ON-Si C复相耐火材料的显气孔率最小(17.6%),体积密度最大(2.48 g·cm-3),抗折强度最大(22.2 MPa);经1 500℃热处理后,蔗糖结构被破坏,粘结性降低,导致耐火材料显气孔率变大,体积密度减小,抗折强度降低。To reduce the pollution of refractories and protect the environment,ZrN-SiAlON powder was syn-thesized by carbothermal reduction nitridation with natural zircon,medium-and low-grade bauxite and SiC powder as the main starting materials （zircon bauxite =9 1,by mass）at 1 600 ℃ for 3 h in N2 atmos-phere.Then ZrN -SiAlON -SiC composite refractories were prepared with 60 mass% SiC powder and 40 mass% ZrN-SiAlON powder drying at 150 ℃ adding sucrose as carbon bonding agent.The influence of sucrose additions （extra adding 4%,8%,12%,and 16%,by mass）on the properties of the ZrN-SiAlON-SiC refractories drying at 150 ℃ or firing at 1 500 ℃ was researched.The results show that the apparent po-rosity,bulk density,modulus of rupture of prepared ZrN-SiAlON-SiC refractories reach the optimal value, 17.6%,2.48 g·cm -3 ,and 22.2 MPa,respectively after drying at 150 ℃ when the sucrose addition is 12 mass%. After the heat treatment at 1 500 ℃,the specimen has increased apparent porosity,decreased bulk density,and reduced modulus of rupture owing to the destroy of the sucrose structure and the declined bonding.

关 键 词：结合剂 蔗糖 耐火材料 抗折强度 

分 类 号：TQ175[化学工程—硅酸盐工业]