Elaboration of oxide nanocrystalline powders, microstructure and nanochemistry.

• Autorzy: Laher-Lacour F. , Kusinski J. , Tebtoub M. , Petot C. , Petot-Ervas G.

Warianty tytułu

PL

Opracowanie nanokrystalicznych proszków tlenkowych, mikrostruktura i nanochemia.

• Konferencja: XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September, 2001
• Języki publikacji: PL

Abstrakty

EN

Ultra fine powders were prepared either by freeze-drying (VO2, Y2O3-doped ZrO2, CeO2) or by the alum process (550 and 1650 ppm by wt MgO-doped Al2O3). X-ray diffraction and transmission electron microscopy analysis reveal that the as-prepared particles were well crystallized after thermal decomposition of the precursor. The average crystallite size is a function of the calcination temperature and of the amount of dopant; MgO acting as a grain growth inhibitor of the alumina grains, due likely to the high segregation of Mg at the periphery of the grains shows by XPS analysis.

Słowa kluczowe

PL

materiały tlenkowe; materiały tlenkowe nanokrystaliczne; proszki; mikrostruktura; nanochemia; krystalit; pomiar; właściwości fizykochemiczne

EN

oxide nanocrystalline powders; microstructure; nanochemistry; crystallite; measurement; physicochemical properties

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2001
• Tom: R. XXII, nr 4
• Strony: 524--525
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Laher-Lacour F.

• Ecole Centrale, Paris, France

autor

Kusinski J.

• University of Mining and Metallurgy, Laboratory of Surface Engineering, Kraków, Poland

autor

Tebtoub M.

• Ecole Centrale, Paris, France

autor

Petot C.

• Ecole Centrale, Paris, France

autor

Petot-Ervas G.

• Ecole Centrale, Paris, France

• Ecole Centrale, Paris, France

Bibliografia

• [1] Bernejo E., Dontas T., Lacour C., Quarton M., Mechanism of formation of nano-crystalline hematite prepared by freeze drying. Mat. Res. Bull.,1995, p. 645
• [2] Petot C., Filal M., Rizea D., Westmacott K.H., Laval Y., Lacour C., Ollitrault R., Microstructure and ionic conductivity of freeze – dried yttria-doped zirconia, J..Eur., Cer. Soc. 18,1998, p.1419.
• [3] Monceau D., Petot C., Petot-Ervas G., Rowley P., Graham M., Sproule I., The microstructure and microchemistry of a-alumina powders after thermal treatment at 1300°C, J.Eur.Cer.Soc., 12,1993, p. 337
• [4] Petot-Ervas G., Petot C., Monceau D., Sproule I., Graham M., Kinetic demixing of solute cations in alumina single crystals during cooling. J.Ara.Cer.Soc., 9, 1995, p. 2314