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Structural, morphological, and optical properties of AgxO thin films deposited via obliquely angle deposition

Soltane H. Ben, Akkari F. Chaffar, Gallas B., Kanzari M.

Materials Science Poland

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2023

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Vol. 41, No. 1

27--41

EN

This work reports on the optical, structural, and morphological properties of silver oxide thin films obtained by postoxidation of silver deposited previously by the thermal evaporation technique. The samples were deposited on glass substrates using the oblique angle deposition technique for different angles of incidence γ (γ=0°, 20°, 40°, 60°, 75°, and 85°). γ is defined as the angle between the particle flux and the normal to the substrate. The resulting thin films were annealed in the free air at two temperatures (300°C and 400°C). X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-visible-NIR spectrophotometer were performed to study the crystal structure, as well as the morphological and optical properties (transmittance and reflectance), of the AgxO samples. X-ray diffraction analysis revealed the presence of the AgxO phase for the silver films deposited at a high angle of incidence and for the annealing temperature 300°C. In contrast, the diffractograms of the silver films annealed at 400°C show an amorphous behavior. Optical results indicated that the direct band gap energy increases pursuant to increasing the angle of incidence γ. The absorption coefficients of AgxO thin films were found to be in the range of 103–105 cm−1. Additionally, we determined the birefringence for the layers annealed at 400°C and found that the highest value of birefringence is obtained corresponding to the angle of incidence 60°. Morphological analysis indicated that the porosity increases with the angle of incidence and highlights the amorphous nature of the films, which is attributed to the columnar structure.

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Badanie wpływu wybranych tlenków metali na możliwość modyfikacji barwy ceramicznej farby purpurowej

Karaś A., Chmielewska D., Synowiec B.

Szkło i Ceramika

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2016

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R. 67, nr 6

15--18

PL

Ceramiczna farba purpurowa składa się z pigmentu nieorganicznego Purpury Kasjusza i odpowiednio dobranego topnika. Farba znajduje szerokie zastosowanie w zdobieniu porcelany zarówno w technice malarskiej, jak i w technice sitodruku pośredniego (kalki ceramicznej). Przeprowadzone badania miały na celu ustalenie wpływu domieszek tlenków metali na możliwość uzyskiwania różnych odcieni barwy purpurowej i fioletowej. Do ceramicznej farby purpurowej na bazie bezołowiowego topnika, na różnych etapach jej wytwarzania, dodawano następujące tlenki metali: tlenek srebra Ag2O, tlenek chromu Cr2O3, tlenek miedzi CuO, tlenek indu In2O3, tlenek itru Y2O3, tlenek kobaltu Co3O4 i określano parametry barwy L*a*b* uzyskanych farb w stosunku do farby wzorcowej, bez żadnych dodatków. W wyniku przeprowadzonych badań wykazano, że stosując domieszkowanie tlenkami metali na różnych etapach wytwarzania farby purpurowej, można uzyskać różne odcienie purpury i fioletu, a przy modyfikacji barwy farby ważny jest również etap dodawania domieszek.

EN

Ceramic purple colour consists of Purple of Cassius inorganic pigment and properly chosen flux. The colour is widely used for decoration of porcelain both in painting technique as well as in technique of indirect screen printing (decal). The aim of the carried out tests was to settle influence of metal oxides’ admixtures upon possibility of obtaining various shades of purple and violet colour. The following metal oxides were being added to the ceramic purple colour on the base of its leadless flux, at various stages of its manufacturing: silver oxide Ag2O, chromium oxide Cr2O3, cupric oxide CuO, indium oxide In2O3, yttrium oxide Y2O3, cobaltic oxide Co3O4 and parameters of colour L*a*b* of the obtained colours were defined comparing to the pattern colour, without any admixtures. As the result of the carried out tests it was shown, that performing admixtures of metal oxide at different stages of purple colour’s manufacturing, various shades of purple and violet can be obtained, and during modification of colour the stage of admixtures’ addition is important as well.

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Ternary System V2O5 – MoO3 – Ag2O Diagram

Wenda E., Bielański A.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 9

1705-1705

EN

The paper reviews an extensive study on the V2O5 – MoO3 – Ag2O system and presents the phase diagram of this system not described earlier in the literature.