磷石膏制备陶瓷模用β-半水石膏及其表征  

PREPARATION AND CHARACTERIZATION OF β-HEMIHYDRATE GYPSUM USED FOR PLASTER MOULD FROM PHOSPHOGYPSUM

作　　者：王军霞[1] 覃由利[1] 韩旭[1] 王进[1] 

机构地区：[1]四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,西南科技大学,绵阳621010

出　　处：《中国陶瓷》2011年第4期25-28,共4页China Ceramics

基　　金：国家自然科学基金项目(10476023);西南科技大学青年基金项目,(09zx3165)

摘　　要：以磷石膏为原料,制备了陶瓷模用β-半水石膏粉,利用XRF、XRD和SEM等手段研究了预处理和煅烧工艺对磷石膏及β-半水石膏的化学成分、物相和形貌的影响,并测试了β-半水石膏的物理性能。结果表明:以磷石膏为原料制备陶瓷模用β-半水石膏粉在工艺上是可行性的,其物理性能可以达到陶瓷模用β-半水石膏粉合格品的指标,以适量的三聚磷酸钠作为缓凝剂可以改善其凝结过快的不足。β-hemihydrate gypsum used for plaster mould in ceramic industry from phosphogypsum were prepared.The influences of pretreatment and calcination technology on the chemical composition,crystal phase and micro-morphology of phosphogypsum and β-hemihydrate gypsum were analyzed by XRF,XRD and SEM.The results showed that it was feasible to prepare β-hemihydrate gypsum used for plaster mould in ceramic industry from phosphogypsum,which could achieve the standards for qualified items in physical performance.And the retarder,sodium tripolyphosphate,was properly added to improve the weakness of condensation too fast.＂

关 键 词：磷石膏 β-半水石膏 石膏模具 

分 类 号：TQ174.62[化学工程—陶瓷工业]