Subsolidus phase diagram of the binary system (n-C n H2n+1NH3)2CoCl4

Autor: Tiechen Han, Kezhong Wu, Jian-Jun Zhang, Xiaodi Liu, Biyan Ren, Bei Ruan
Rok vydání: 2012
Předmět:
Zdroj: Journal of Thermal Analysis and Calorimetry. 111:1311-1315
ISSN: 1572-8943
1388-6150
DOI: 10.1007/s10973-012-2404-5
Popis: The perovskite-type layered compounds decylammonium tetrachlorocobaltate (n-C10H21NH3)2CoCl4 and dodecylammonium tetrachlorocobaltate (n-C12H25NH3)2CoCl4 exist the solid–solid phase transition in the temperatures range 330–380 K. These laminar materials contain bilayers sandwiched between metal halide layers. The experimental subsolidus binary phase diagram of (n-C10H21NH3)2CoCl4–(n-C12H25NH3)2CoCl4 has been established over the whole composition range by differential thermal analysis and X-ray diffraction. In the phase diagram, one intermediate compound (n-C10H21NH3) (n-C12H25NH3)CoCl4 at \( W_{{{\text{C}}_{ 1 0} {\text{Co}}}} \% = 50. 9 2 \) and two eutectoid invariants points at \( W_{{{\text{C}}_{ 10} {\text{Co}}}} \% = 2 9. 8 3 \) and \( W_{{{\text{C}}_{ 10} {\text{Co}}}} \% = 7 7. 9 8 \) were observed, two eutectoids temperatures are about 343 ± 1 and 340 ± 1 K. There are three noticeable solid solution ranges (α, β, γ) at the left and right boundary and middle of the phase diagram.
Databáze: OpenAIRE
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