Speciation of Raney Copper Oxide during High-Temperature Desulfurization

2007 ◽  
Author(s):  
T. C. Wang ◽  
H. Paul Wang ◽  
C. Y. Chen ◽  
Hsin-Liang Huang ◽  
Yu-Ling Wei
Keyword(s):  
High Temperature ◽  
Copper Oxide

Theoretical Studies of Copper Oxide Clusters: Prediction of an Electronically Driven Phase Separation in YBa2Cu3Ox

1987 ◽  
Vol 99 ◽  
Author(s):  
L. A. Curtiss ◽  
T. O. Brun ◽  
D. M. Gruen
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
High Temperature ◽  
Copper Oxide ◽  
Superconducting Phase ◽  
Oxygen Stoichiometry ◽  
Molecular Orbital Calculations ◽  
Theoretical Studies ◽  
Two Phases ◽  
Semi Empirical

ABSTRACTOn the basis of semi-empirical extended Hiickel molecular orbital calculations of copper-oxide clusters representing the new superconducting material YBa2Cu3Ox, a phase diagram is proposed which suggests that the 94 K high temperature superconducting phase of YBa2Cu3Ox is characterized by an oxygen stoichiometry near 7.0. The phase diagram predicts that a plateau should exist for Tc in the region x = 0.0 – 0.25 and that in this region two phases are present which are characterized by compositions having oxygen stoichiometries 6.5–6.75 and ca. 7.0.

High-temperature superconductivity in yttrium-barium-copper oxide: identification of a copper-rich superconducting phase

1987 ◽  
Vol 109 (8) ◽  
pp. 2528-2530 ◽  
Author(s):  
Angelica M. Stacy ◽  
John V. Badding ◽  
Margret J. Geselbracht ◽  
William K. Ham ◽  
Gary F. Holland ◽  
...  
Keyword(s):  
High Temperature ◽  
Yttrium Barium Copper Oxide ◽  
Copper Oxide ◽  
High Temperature Superconductivity ◽  
Barium Copper Oxide ◽  
Superconducting Phase ◽  
Barium Copper ◽  
Yttrium Barium

scholarly journals Photoelectrochemical Behavior of Copper Oxide Films Formed by High Temperature Oxidation

1994 ◽  
Vol 58 (12) ◽  
pp. 1420-1428 ◽  
Author(s):  
Motoi Hara ◽  
Tokiko Nakagawa ◽  
Yoshiyuki Sato ◽  
Kunihiko Yamaguchi ◽  
Yutaka Shinata
Keyword(s):  
High Temperature ◽  
Copper Oxide ◽  
High Temperature Oxidation ◽  
Oxide Films ◽  
Temperature Oxidation

Application of Small Size Solar Furnace onto Preparation of Copper Oxide Thin Films by Sol-Gel Route

2016 ◽  
Vol 703 ◽  
pp. 209-213
Author(s):  
Takashi Ehara ◽  
Taichi Sasaki ◽  
Hiroo Motomiya
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
Copper Oxide ◽  
Thermal Annealing ◽  
Sol Gel ◽  
Solar Furnace ◽  
Acetate Solution ◽  
Oxide Thin Films ◽  
Gel Film ◽  
Pure Cu

In this manuscript, we will describe the preparation of copper oxide thin films by sol-gel route using solar furnace with area of about 1.5 m2 as a rapid thermal annealing apparatus. The gel films prepared by spin-coating of Cu acetate solution transferred to CuO or Cu2O films after thermal annealing for 1 min employing solar furnace consists of Fresnel lens. The result reveals that the solar furnace can provide enough energy to cause the high temperature reaction of sol-gel route copper oxide synthesis. In addition, the result displays that the solar furnace is preferable apparatus to carry out a kind of high temperature rapid annealing. The oxidization reaction of the gel films significantly depends on the structure of the gel films before annealing. In the case of the gel film which contains little CuO, the film becomes mixture of CuO and Cu2O after the annealing by solar furnace. In contrast, the gel film with CuO structure transferred to pure Cu2O film after the annealing.

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