TY - JOUR
T1 - Thermogravimetric study of the reduction and sulfurization of Nd2(SO4)3 using carbon disulfide
AU - Skrobian, Milan
AU - Sato, Nobuaki
AU - Fujino, Takeo
N1 - Funding Information:
One of the authors (M.S.) thanks the Ministry of Education, Science Culture, Japan, for financial support through the Monbusho Scholarship.
PY - 1995/1/16
Y1 - 1995/1/16
N2 - The basic steps in the reaction of Nd2(SO4)3 with CS2 were studied by thermogravimetric techniques to elucidate the reaction mechanism of the formation of Nd2S3. The Nd2(SO4)3 first decomposes to Nd2O2SO4 in the range 500-650°C, depending on the heating rate. Nd2O2SO4 is further deoxygenated to Nd2O2S, which forms a disulfide phase at lower temperatures (500-600°C) by reaction with CS2. Neodymium disulfide, which exhibits a wide range of non-stoichiometry (NdS1.876-NdS2), decomposes into Nd2S3 above 600°C. At lower heating rates (1 and 5°C min-1), orthorhombic Nd2S3 is formed in a single phase on heating to 1100°C. In contrast, non-stoichiometric cubic Nd2S3 - x is formed together with orthorhombic Nd2S3 when the heating rate is as high as 10°C min-1.
AB - The basic steps in the reaction of Nd2(SO4)3 with CS2 were studied by thermogravimetric techniques to elucidate the reaction mechanism of the formation of Nd2S3. The Nd2(SO4)3 first decomposes to Nd2O2SO4 in the range 500-650°C, depending on the heating rate. Nd2O2SO4 is further deoxygenated to Nd2O2S, which forms a disulfide phase at lower temperatures (500-600°C) by reaction with CS2. Neodymium disulfide, which exhibits a wide range of non-stoichiometry (NdS1.876-NdS2), decomposes into Nd2S3 above 600°C. At lower heating rates (1 and 5°C min-1), orthorhombic Nd2S3 is formed in a single phase on heating to 1100°C. In contrast, non-stoichiometric cubic Nd2S3 - x is formed together with orthorhombic Nd2S3 when the heating rate is as high as 10°C min-1.
KW - Carbon disulphide
KW - Neodymium disulphide
KW - Neodymium oxysulphate
KW - Neodymium oxysulphide
KW - Neodymium sesquisulphide
KW - Neodymium sulphate
KW - TG
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U2 - 10.1016/0040-6031(95)90696-7
DO - 10.1016/0040-6031(95)90696-7
M3 - Article
AN - SCOPUS:0342333088
VL - 249
SP - 211
EP - 219
JO - Thermochimica Acta
JF - Thermochimica Acta
SN - 0040-6031
IS - C
ER -