The Formation Process of Cobalt Sulfide from Tricobalt Tetraoxide Using Sulfur Dioxide as a Sulfidizing Agent

Ryoko Matsuzaki; Akimasa Yajima; Motonori Eguchi; Yuzo Saeki

doi:10.1246/bcsj.55.1480

The Formation Process of Cobalt Sulfide from Tricobalt Tetraoxide Using Sulfur Dioxide as a Sulfidizing Agent

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.55.1480 ◽

1982 ◽

Vol 55 (5) ◽

pp. 1480-1483 ◽

Cited By ~ 6

Author(s):

Ryoko Matsuzaki ◽

Akimasa Yajima ◽

Motonori Eguchi ◽

Yuzo Saeki

Keyword(s):

Sulfur Dioxide ◽

Formation Process ◽

Cobalt Sulfide ◽

Sulfidizing Agent

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ChemInform Abstract: THE FORMATION PROCESS OF COBALT SULFIDE FROM TRICOBALT TETRAOXIDE USING SULFUR DIOXIDE AS A SULFIDIZING AGENT

Chemischer Informationsdienst ◽

10.1002/chin.198235036 ◽

1982 ◽

Vol 13 (35) ◽

Author(s):

R. MATSUZAKI ◽

A. YAJIMA ◽

M. EGUCHI ◽

Y. SAEKI

Keyword(s):

Sulfur Dioxide ◽

Formation Process ◽

Cobalt Sulfide ◽

Sulfidizing Agent

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Formation process of periodic non-conservative antiphase boundary structure in L-Pd5Ce

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100173947 ◽

1990 ◽

Vol 48 (4) ◽

pp. 162-163

Author(s):

Masaru Itakura ◽

Noriyuki Kuwano ◽

Kensuke Oki

Keyword(s):

Formation Process ◽

Domain Size ◽

Antiphase Boundary ◽

Boundary Structure ◽

Temperature Phase ◽

Arc Melting ◽

Iced Water ◽

Antiphase Domains ◽

Low Temperature Phase ◽

Degree Of Order

The low temperature phase of Pd5Ce (L-Pd5Ce) has a one-dimensional long period superstructure (1D-LPS) derived from Ll2. The periodic antiphase boundaries (APBs) are parallel to (110) planes and have a shift vector of 1/2[110]. Hereafter, the indices are referred to the basic lattices of Ll2 As insertion of the APB causes a change in composition, such an APB is called “non-conservative”. Then, a domain size M depends upon the Ce concentration in the alloy. It was found that M increases also with temperature. The temperature dependency of M is attributed to a change of the degree of order within the antiphase domains. In this work, morphology of the non-conservative APBs is observed to clarify the formation process of the 1D-LPS.The alloy of Pd-16.7 at%Ce was prepared by arc melting in argon atmosphere. Disc specimens made from the alloy ingot were first held at 985 K for 260 ks and quenched in iced water to obtain the state of M=∞ or Ll2, followed by annealing for various lengths of time. The annealing temperature was 873 K where the equilibrium value for M is about 3 in unit of (110) lattice spacing of Ll2. Observation was carried out using microscopes JEM-2000FX, JEM-4000EX (HVEM Lab., Kyushu Univ.) and JEM-2000EX (Dept. of Mater. Sci. Tech., Kyushu Univ.).

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