ELECTROCHEMICAL FORMATION AND CHARACTERIZATION OF MIXED VALENCE AND ABNORMAL VALENCE OXIDE FILMS

混合价态和异常价态氧化膜的电化学形成及表征

• 批准号: 06452330
• 负责人: KONNO Hidetaka
• 金额: $ 4.86万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452330/
• 关键词: Electrodeposition; Compounds of abnormal valence; Compounds of mixed valence; Oxide film; Cr (V) compound; Mo (V) -Mo (VI) compounds

1. Formation conditions of abnormal valence Cr compound LaCrO_4 from the precursor films electrodeposited from La (III) -Cr (VI) solutions were established. Thermally stable regions of LaCrO_4 were determined as functions of temperature, heating time and oxygen partial pressure. LaCrO_4 is stable below 500ﾟC independent of oxygen partial pressure and does not decompose in a vacuo at room temperature.2. Electric conductivity of LaCrO_4 film increased exponentially with temperature above 150ﾟC,indicating a similar property to semiconductors. The conductivity was higher than that of perovskite type LaCrO_3 film formed by the same process, but the valency control of A site showed no effect on the conductivity.3. Mixed valence molybdenum oxyhydroxide films were formed by cathodic deposition from solutions of ammonium molybdate and magnesium sulfate (MgSO_4). MgSO_4 was found to be a necessary component in the solution to from uniform and adhesive films.4. The mixed valence molybdenum oxyhydroxide films were amorphous and didn't crystallize by heating at 200ﾟC for 12 hours. Spectrophotometric emissivity of the films at 100ﾟC was about 30-50% in the IR region of 4-10 mum and it increased to more than 90% for longer wave length than 10 mum. The films showed electric conductivity with or without drying. These characteristics suggest that the films are potentially useful material for many purposes such as a far IR radiator, sensors, IR detectors, and so on.5. It was found that gel-like oxyhydroxide films of mixed valence rare-earch elements, such as Ce (III) -Ce (IV), can be formed by cathodic polarization in nitrate solutions of rare-earth elements.

1。从（III）-CR（VI）溶液中电沉积的异常CR CR CROUND LACRO_4的形成条件。 500゜氧气压力在室温下在真空中分解。没有对电导率的影响3。含氧氧化物是rphous的，在200 C时加热的结晶约为30-50％，在长度长度大于10摄氏度的情况下，这些特征可能是膜的，这可能是膜的可能有用的材料。许多目的，例如IR散热器，IR检测器等。5。地球元素。

项目成果

A.Furusaki: "Perovskite-type lanthanum chromium-based oxide films prepared by ultrasonic spray pyrolysis" J.Materials Science. 30. 2829-2834 (1995)

A.Furusaki：“超声喷雾热解制备钙钛矿型镧铬基氧化物薄膜”J.Materials Science。

A.Furusaki: "Pyrolytic process of La(III)-Cr(VI) precursor for the perovskite type lanthanum chromium oxide" Thermochimica Acta. 253. 253-264 (1995)

A.Furusaki：“钙钛矿型氧化铬镧的 La(III)-Cr(VI) 前体的热解过程”Thermochimica Acta。

H.Konno: "Evaluation of functional thin film mayterials (2) Evaluation for thin oxide films" DENKI KAGAKU. Vol.63. 373-376 (1995)

H.Konno：“功能性薄膜材料的评估（2）薄氧化膜的评估”DENKI KAGAKU。

A.Furusaki: "Perovskite-type lanthanum chromium-based oxide films prepared by ultra sonic spray pyrolysis" J.Materials Science. 30. 2829-2834 (1995)

A.Furusaki：“超声喷雾热解制备钙钛矿型镧铬基氧化物薄膜”J.Materials Science。

A.Furusaki, H.Konno, R.Furuichi: "Perovskite-type lanthanum chromium-based oxide films prepared by ultra sonic spray pyrolysis" J.Mater. Sci.Vol.30. 2829-2834 (1995)

A.Furusaki、H.Konno、R.Furuichi：“超声喷雾热解制备钙钛矿型镧铬基氧化物薄膜”J.Mater。