Synthesis of zirconia colloidal dispersions by forced hydrolysis
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Different zirconia colloidal dispersions (sols) were prepared from zirconyl oxynitrate and zirconyl oxychloride solutions by forced hydrolysis. Vigorously stirred acidic solutions of these salts were refluxed at 102 degrees C for 24 h. Characterization of the obtained sols (pH, solid phase content, crystal structure) was performed by potentiometric, XRD, TGA/DTA and SEM measurements. The prepared sols contained almost spherical monoclinic hydrated zirconia particles 7-10 nm in diameter.