1988 Fiscal Year Final Research Report Summary
A study of Perovskite-Type Mixed Oxides Highly Functionalized by Controlling Anomalous Valence and Interface
| Project/Area Number |
62430017
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
工業物理化学
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
KITAZAWA Koichi Faculty of Engineering, The University of Tokyo, 工学部, 教授 (90011189)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MAKOTO Misono Faculty of Engineering, The University of Tokyo, 工学部, 教授 (20011059)
|
|---|
| Project Period (FY) |
1987 – 1988
|
| Keywords | Superconductivity / Oxygen Vacancy / Valence control / Perovskite / Catalytic combution / XPS / STM / 薄膜触媒 |
|---|
| Research Abstract |
[1] Valence control and analysis of perovskite-type oxides. The relationship between the oxygen vacancy, oxidation state and the superconductivity has been quantitatively investigated. The highest Tc of 38 K was obtained for (La_<1-x>Sr_x)_2CuO_4 when the oxidation number of Cu was 2,16. The much greater influenece of B-site substitution than A-site substitution with paramagnetic ion, demonstrated that the supreconductivity is revealed along CuO plane.
[2] Active ceramic catalysts for catalytic combution. By the valence control with A site substitution and by the dispersion of active component on a ZrO_2 support, a highly active catalyst for catalytic combution was obtained. The structure and mechanism have been examined by XPS, IR and EDX measurements.
[3] STM. A versatile and compact STM was constructed and the energy gap was measured for a single crystal of Bi_2Sr_2CaCuOy.
|
