Thermogravimetric study of the reduction and sulfurization of Nd2(SO4)3 using carbon disulfide

Milan Skrobian; Nobuaki Sato; Takeo Fujino

doi:10.1016/0040-6031(95)90696-7

Thermogravimetric study of the reduction and sulfurization of Nd₂(SO₄)₃ using carbon disulfide

Milan Skrobian, Nobuaki Sato, Takeo Fujino

Division of Process and System Engineering

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 (NdS_1.876-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 Nd₂S_{3 - x} is formed together with orthorhombic Nd₂S₃ when the heating rate is as high as 10°C min^-1.

Original language	English
Pages (from-to)	211-219
Number of pages	9
Journal	Thermochimica Acta
Volume	249
Issue number	C
DOIs	https://doi.org/10.1016/0040-6031(95)90696-7
Publication status	Published - 1995 Jan 16

Keywords

Carbon disulphide
Neodymium disulphide
Neodymium oxysulphate
Neodymium oxysulphide
Neodymium sesquisulphide
Neodymium sulphate
TG

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Physical and Theoretical Chemistry

Access to Document

10.1016/0040-6031(95)90696-7

Cite this

@article{68ec044b85ff482e9b9c17ca6b853a18,

title = "Thermogravimetric study of the reduction and sulfurization of Nd2(SO4)3 using carbon disulfide",

abstract = "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.",

keywords = "Carbon disulphide, Neodymium disulphide, Neodymium oxysulphate, Neodymium oxysulphide, Neodymium sesquisulphide, Neodymium sulphate, TG",

author = "Milan Skrobian and Nobuaki Sato and Takeo Fujino",

note = "Funding Information: One of the authors (M.S.) thanks the Ministry of Education, Science Culture, Japan, for financial support through the Monbusho Scholarship.",

year = "1995",

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doi = "10.1016/0040-6031(95)90696-7",

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journal = "Thermochimica Acta",

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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.

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KW - Neodymium sesquisulphide

KW - Neodymium sulphate

KW - TG

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