1) two steps crystallization
两步结晶
2) Two stage crystallization model
两步结晶模型
3) Two-step crystallization
两步晶化
1.
Mesoporous materials with the primary structure units of zeolite in the pore wall have been synthesized by a two-step crystallization process at 140 ℃ and characterized by XRD, N 2 physical adsorption/desorption, TEM, IR and NH 3-TPD methods.
采用两步晶化法合成了孔壁含沸石初级结构单元的六方介孔材料 ,用XRD ,N2 吸附 -脱附 ,TEM ,IR和NH3 TPD对样品进行了表征 ,考察了晶化时间、碱度、温度和NH+ 4离子交换对样品的影响 。
2.
The composite molecular sieves Beta/MCM-41 with different ratios of SiO2/Al2O3 were hydrothermally synthesized by two-step crystallization with tetraethylammonium hydroxide and cetyltrimethylammoniumbromide as templates.
分别以四乙基氢氧化铵和十六烷基三甲基溴化铵作为微孔相和介孔相的模板,采用两步晶化法制备了4种具有不同硅铝比,含微孔和介孔双模孔结构的Beta/MCM-41复合分子筛。
4) two-step sintering
两步烧结
1.
3Ti4O15 ferroelectric ceramics were fabricated by two-step sintering process.
采用两步烧结工艺制备Sr0。
2.
Y(NO3)3·6H2O-doped ZnO varistor ceramics were prepared by two-step sintering method.
采用两步烧结法制备了Y3+掺杂的(以Y(NO3)3·6H2O形式加入)ZnO压敏陶瓷,通过XRD、SEM和EDX系统研究了Y3+掺杂量对ZnO压敏陶瓷微结构和电性能的影响。
3.
3Ti4O15 were fabricated by different sintering programs including conventional sintering (dwelling at maximum temperature) and two-step sintering (dwelling at lower temperature).
采用传统高温直接烧结和低温保温的两步烧结工艺制备铋层结构铁电陶瓷Sr0。
5) Two-step synthesis
两步晶化法
1.
Composite micro/mesoporous MCM-48/ZSM-5 materials were successfully prepared by using a two-step synthesis route.
利用两步晶化法制备了高水热稳定性的MCM-48/ZSM-5介微孔复合分子筛。
6) Step crystallization
逐步结晶
补充资料：分步结晶
一种古老的用于分离化学性质相近的金属化合物的方法。此法依靠化合物间溶解度的微小差别，通过重复操作而达到分离的目的。钽、铌复合氟化物（如K2TaF7和K2NbOF5·H2O）的分步结晶，锆、铪复合氟化物（如K2ZrF6和K2HfF6）的分步结晶,铷、钾草酸盐的分步结晶，轻稀土硝酸盐和硝酸铵(或硝酸镁)复盐的分步结晶等，都曾经在工业上应用。此法近年来虽然多被溶剂萃取法和离子交换法所代替，但在某些条件下仍然应用。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条