热致相变材料C_(10)Cu-C_(12)Cu二元体系相图  

Binary Phase Diagram of C_(10)Cu-C_(12)Cu of Thermotropic Phase Transitions Materials

作　　者：赵惠敏[1] 刘晓地[1] 武克忠[1] 

机构地区：[1]河北师范大学化学与材料科学学院,河北石家庄050016

出　　处：《河北师范大学学报（自然科学版）》2006年第2期188-191,共4页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金资助项目(50274010;50404013);河北省自然科学基金资助项目(202139)

摘　　要：合成了2种具有层状钙钛矿结构的热致相变材料四溴合铜酸癸铵(nC10H21NH3)2CuBr4(简记C10Cu)和四溴合铜酸十二铵(nC12H25NH3)2CuBr4(简记C12Cu),并在2种材料的乙酸溶液中结晶出一系列C10Cu C12Cu二元体系.利用差热分析(DTA)和X射线衍射(XRD)构筑了C10Cu C12Cu二元体系相图.在实验相图中确定了新的稳定化合物C10C12Cu的存在和2个不变的共晶点,共晶点温度分别为35℃和30℃.与同类体系的其他相图相比,在此相图的左右边界和中间区域存在3个显著的固溶区.Thermotropic phase transition compounds with the perovskite type layer structure, （n- C10H21NH3）2CuBr, and （n-C12H25NH3）2CuBr4 were synthesized. A series of binary phases C10CU- C12CU were crastalized from the acetic acid solutions of their mixtures. The experimental binary phase diagram of C10Cu-C12Cu was established by differential thermal analysis （DTA） and X-ray diffraction （XRD）. In the phase diagram, new stable material （ n-C10H21NH3 ） （ n-C12 H25 NH3 ） CuBr4, and two eutectoid invariants with the eutectic point temperature of 35 and 30℃ were observed. Compared with the phase diagrams of other similar systems, there were three noticeable solid solution ranges at the left boundary, right boundary and middle of the phase diagram respectively.

关 键 词：四溴合铜酸癸铵 四溴合铜酸十二铵 DTA XRD 相图 

分 类 号：O642.3[理学—物理化学]