Optical properties and chemical resistance of FeCr oxide films

Sakata, Naoki; Hyodo, Masato; Kawahara, Hideo

doi:10.1016/0022-3093(82)90137-5

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…Secondly, transition-metal oxide thin films which were traditionally used as hightemperature absorbers of solar radiation are now finding other applications such as chromogenic and decorative coatings [11,[21][22][23][24], oxygen sensors in automobiles [4] and as high-temperature stabilizers for metal chalcogenide coatings [25]. In our previous report [18] we described in some detail the optimum chemical bath deposition process parameters for obtaining good-quality CoO thin films both at room temperature and at 60°C bath temperature.…”

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confidence: 99%

Physical properties of electroless CoO thin filins

Eze

1998

Nouv Cim D

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Thin films of cobalt II oxide were prepared by the chemical bath deposition process using aqueous ammonia (30%) as a complexing agent. A post-deposition annealing treatment of the as-deposited films at 350°C for 30 mins in a controlled oxygen atmosphere (100-130 kPa/cm 2 ) was found to be a necessary precondition for obtaining good-quality CoO thin films. The films are p-type and semi-insulating with low carrier density of about 1011 em -3, high resistivity, and very low photosensitivity. From the study of the optical transmission spectra in the UV, visible and near-IR regions it was observed that the films had less than 10% transmittance in the UV,~50 % in the mid-visible region and 86% at a wavelength of 1100 nm. The optical constants were computed from the reflectance and transmittance spectra. The refractive-index values in the near-infrared region were fitted to the single oscillator Sellmeier dispersion model, yielding an undispersed refractive index of 1.80. The films showed both direct and indirect optical bandgaps E g , of 4.14 ± 0.05 eV and 3.89 ± 0.02 eV, respectively. PACS 81.15 -Methods of deposition of films and coatings; film growth and epitaxy. PACS 81.15.Lm -Liquid phase epitaxy; deposition from liquid phases (melts, solutions and surface layers on liquids).

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confidence: 99%

Physical properties of electroless CoO thin filins

Eze

1998

Nouv Cim D

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“…Films of this type are generally used to lower the solar heat gain of the glass, especially in hotclimate regions [2]. This characteristic of the film is described by reflecting and absorbing much of the solar radiation, and are said to be semi-reflective coatings [2,3]. In case of the large area glass substrates, spray pyrolysis is the most preferred deposition technique among the deposition methods.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Co-Based Metal Oxide Films on Glass

Arpat

Ürgen

Kaplan³

et al. 2004

KEM

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Spray pyrolysis is a well-known technique for depositing metal oxides over large area substrates. Cobalt oxide based thin films have been deposited on glass substrates on the float glass production line by spray pyrolysis technique. The commercial products of this type of coatings are used for architectural purposes and in automotive industries. Additions of transition metal oxides in Co-oxide such as Cr and Fe improved mechanical and chemical properties of Co-based oxide coating. The Co-based binary and ternary mixed oxides showed cubic spinel structure. Lattice constants increased as the content of the additives increased and mean crystallite sizes decreased. The absorption bands in optical transmission spectra of the Cooxide tended to disappear and the transmittance increased with increasing Cr content. The results of durability tests showed that the Cr improved the chemical resistance and Fe incresed the adhesion and abrasion resistances.

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“…Several investigations have been carried out in which the preparation and properties of transition metal oxide films are described, mainly because some unique properties of these materials make them very useful in solar energy and other photonic applications such as photothermal conversion [1][2][3][4][5][6][7], energy-conserving window coatings [8][9][10][11] and chromogenic coatings [12][13][14][15]. These applications have been explained in detail by Seraphin [16], Lampert [17] and Granqvist et al [18].…”

Section: Introductionmentioning

confidence: 99%

“…Such methods include spray pyrolysis [12,13,19,20], dip-coating [4,9], electrodeposition [1,3,5], oxidation of an electroplated thin cobalt layer [2,6] or thermal decomposition of an aqueous or organic solution of cobalt nitrate [7]. Chemical methods for the preparation of thin films generally offer the advantages of simplicity, low cost, mass production and easy coating of large-area surfaces.…”

Section: Introductionmentioning

confidence: 99%

Electroless deposition of CoO thin films

Eze¹

1999

J. Phys. D: Appl. Phys.

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The influence of various preparation conditions such as bath composition, film growth and heat treatment conditions on the properties of chemical bath deposited cobalt II oxide thin films has been studied. The interference fringes on the transmission spectra were used to calculate the refractive index and the average thickness of the films. The effects of surface roughness of the films on the interference extrema are also analysed. The maximum film thickness obtainable in a single deposition cycle is about 700 nm. X-ray diffractometry, energy-dispersive analysis of x-ray fluorescence and electrical resistivity measurements were also used for the characterization of the films. The properties of the deposited films are similar to those of hot-sprayed and sol-gel and baked films but film deposition is simpler and more cost effective than via solution growth procedures.

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Optical properties and chemical resistance of FeCr oxide films

Cited by 8 publications

References 2 publications

Physical properties of electroless CoO thin filins

Physical properties of electroless CoO thin filins

Characterization of Co-Based Metal Oxide Films on Glass

Electroless deposition of CoO thin films

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