Sinteza unor pigmenti mov cu structura de casiterit si studiul comportarii lor in glazuri ceramice

摘要

There are presented the results obtained concerning the optimum synthesis conditions of the mauve pigments with cassiterite structure (Sn,Cr)O2,as iveli as the characterization and testing of the mentioned pigments in ceramic glazes.The pigment with best characteristics has been obtained for a 2% Cr2O3 content associated with an additional5% Li2CO3 and 1% Pr6O11,by annealing at 1250°C,for 3 h.Thephase composition established by X-Ray diffraction ana the visible ditfuse reflectance spectroscopy of the obtained pigment are identical to those of a similar imported pigment.The behaviour of the obtained pigment in coloring some faience tableware glazes is better than that of the imported pigment,as it shows a better stability to the aggressiue action of the glaze generating melts.The obtained pigment is recommended for coloring transparent glazes with low ZnO,BaO and PbO content.