热致相变材料C12Zn-C16Zn二元体系亚固相相图  

Subsolidus Binary Phase Diagram of C_(12)Zn-C_(16)Zn in Thermotropic Phase Transitions Materials

作　　者：武克忠[1] 赵可新[2] 刘晓地[1] 赵娜[1] 韩铁城[1] 

机构地区：[1]河北师范大学化学和材料学院,河北石家庄050016 [2]河北工程技术高等专科学校,河北沧州061001

出　　处：《稀有金属》2006年第2期164-167,共4页Chinese Journal of Rare Metals

基　　金：河北省自然资金资助项目(202139)

摘　　要：合成了两种具有层状钙钛矿结构的热致相变材料四氯合锌酸十二铵(n-C12H25NH3)2ZnCl4和四氯合锌酸十六铵(n-C16H33NH3)2ZnCl4,并在两种材料的乙醇溶液中结晶出一系列C12Zn-C16Zn二元体系。利用差热分析(DTA)和X射线衍射技术进行测定,构筑了C12Zn-C16Zn二元体系相图。在实验相图中确定了新的化合物(n-C12H25NH3)(n-C16H35NH3)ZnCl4的存在,并确定了两个不变的共析点,共析点温度分别为70和73℃。与同类体系的其他相图相比,在此相图的左右边界存在端际固溶体(α和β)和中间区域存在非化学计量相(γ)。The perovskite type layer compound （n-C12 H25NH3）2ZnCl4 and （ n-C16H33NH3）2ZnCl4 with thermotropic phase transitions were synthesized and a series of their mixtures C12Zn-C16Zn were prepared. The experimental binary phase diagram of C12Zn-C16Zn was established by differential thermal analysis （DTA） and X-ray diffraction. In the phase diagram new materials （ n-12 H25 NH3 ） （ n-C16 H33 NH3 ） ZnCl4 and two eutectold invafiants were observed, two eutectic points temperatures are about 70 and 72 ℃. Contrasting other similar system, there are three noticeable solid solution ranges （α,β,γ） at the left and fight boundary and middle of the phase diagram.

关 键 词：四氯合锌酸十二烷基铵 四氯合锌酸十六烷基铵 相图 

分 类 号：TQ266.2[化学工程—有机化工] O642.31[理学—物理化学]