水热法制备Ba_5Nb_4O_（15）纳米粉体  

ANALYSIS OF EXCAVATION RETAINING DESIGN AND MONITORING FOR TWO ADJACENT FOUNDATIONS

作　　者：李苏春[1] 袁运涛[1] 

机构地区：[1]江苏省纺织工业设计研究院有限公司,江苏苏州215128

出　　处：《工业建筑》2012年第10期89-94,共6页Industrial Construction

基　　金：陕西省教育厅科研专项基金资助项目（11JK0829）

摘　　要：采用两步-水热法制备Ba5Nb4O15纳米粉体,研究矿化剂浓度、水热合成温度以及保温时间等因素对产物相组成的影响。利用X射线衍射分析样品相组成,通过Scherer公式计算所的粉体晶粒尺寸。X射线衍射结果表明,水热法合成Ba5Nb4O15单相的工艺条件为：Ba∶Nb=2∶1、碱浓度为2.0mol/L、水热反应240℃/48h,所得粉体晶粒尺寸约35nm。The nearest net distance between the Trust Edifice and Tianxiang Building is 0. 38 meters in complex environment, the excavation was deep and there were different excavation conditions. The bored cast-in-place pile with prestressed interior support were used according to the geological conditions and engineering period. The theoretical calculation of foundation design was carried out with Lizheng and FRWS software on the different profile and condition. The results proved that the excavation was safe. Through the whole construction and monitoring result, it was shown that the design was reasonable.

关 键 词：水热法 Ba5Nb4O15 XRD 

分 类 号：TQ164.6[化学工程—高温制品工业]