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).
参考文献
| [1] | Venkataraman NV.;Barman S.;Vasudevan S.;Seshadri R. .Structural analysis of alkyl chain conformation in the layered organic-inorganic hybrids (CnH2n+1NH3)(2)PbI4 (n=12,16,18) by IR spectroscopy[J].Chemical Physics Letters,2002(1/2):139-143. |
| [2] | 邓金侠,邢献然.铅基弛豫铁电体陶瓷材料PMN-PT制备及研究进展[J].稀有金属,2005(01):76-82. |
| [3] | R.Jakubas;G.Bator;M.Gosniowska .Crystal structure and phase transition of [(CH_3)_2NH_2]GaCl_4[J].The journal of physics and chemistry of solids,1997(6):989-998. |
| [4] | Tabuchi Y.;Rikukawa M.;Sanui K.;Ishigure K.;Asai K. .Preparation and characterization of natural lower dimensional layered perovskite-type compounds[J].The journal of physics and chemistry of solids,2000(6):837-845. |
| [5] | Fenrych J;Reynhardt E C;Jurga S et al.Molecular motions and phase changes in nthe perovskite-type compound (C10 H21NH3)2ZnCl4[J].Molecular Physics,1993,78:1117. |
| [6] | Busico V;Tartaglione T;Vacatello M .Thermal behaviour of mixed long -chain alkylammonium tetrachlorozincate[J].Thermochimica Acta,1983,62:77. |
| [7] | Courchinoux R;Chanh N B;Haget Y .Use of the "shape factors" as an empirical method to determine the actual characteristic temperatures of binary phase diagrams by differential scanning calorimetry[J].Thermochimica Acta,1988,128(01):45. |
| [8] | Atkins P W.Physical Chemistry[M].Oxford:Oxford University,1990:102. |
| [9] | Li W P;Zhang D S;Zhang T P et al.Study of solid-solid phase change of (n-CnH2n + 1NH3)2MCl4 for thermal energy storage[J].Thermochimica Acta,1999,326(01):183. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%