氧化锆凝胶注模工艺研究  

Study on Gelcasting Process of Zirconia Gel

作　　者：丁志静[1] 侯永改[1] 黄庆飞[1] 谢育波 

机构地区：[1]河南工业大学材料科学与工程学院,郑州450001

出　　处：《人工晶体学报》2017年第11期2219-2223,共5页Journal of Synthetic Crystals

基　　金：河南省科技厅重点科技攻关(112102210240);河南工业大学高层次人才基金(31400301)

摘　　要：采用凝胶注模成型超细粒度氧化锆陶瓷。使用小分子型分散剂PBTCA(2-磷酸丁烷1,2,4-三羧酸)制备高固相、低粘度浆料。探讨了分散剂含量、单体与交联剂的比例及引发剂的含量对生坯及氧化锆陶瓷性能的影响。结果表明:当固相含量为50vol%,分散剂加入量为0.2wt%,浆料的粘度为0.86 Pa·s。且当单体和交联剂的比例为15∶1、引发剂的加入量为2.5wt%时,生坯抗弯强度为29.56 MPa;经1520℃烧结后,氧化锆陶瓷体积密度和抗弯强度分别达到5.96 g/cm^3和828.46 MPa。通过SEM进行断面观察,其结构均匀致密。Ultrafine zirconia ceramic was prepared by gel-casting. The slurry with high solid and low viscosity was obtained by using small molecule PBTCA （2-phosphonobutane-l ,2,4-tricarboxylic acid） as dispersant. The effects of the content of dispersant, the ratio of monomer to cross-linker and the content of initiator on the properties of green and zirconia ceramics were discussed. The results show that when the solid content is 50vol% , the viscosity of slurry is 0. 86 Pa ？ s with 0. 2wt% dispersant added. When the ratio of monomer to cross-linker is 15- 1 and the dosage of initiator is 2. 5wt% , the green bodies have the flexural strength of 29. 56 MPa. After sintered at 1520 , the density of zirconia ceramics can reach5.96 g/cm3, and the flexural strength is 828. 46 MPa. Through SEM observation, the structure is uniform and compact.

关 键 词：凝胶注模 氧化锆 工艺 

分 类 号：TB34[一般工业技术—材料科学与工程]