Nano-sized CaTiO3 powder was fabricated by planetary milling with porous particles. A steric entrapment route employing ethylene glycol was used for the preparation of the porous CaTiO3 particles. Titanium isopropoxide and calcium nitrate were dissolved in liquid-type ethylene glycol without any precipitation. With the optimum amount of the polymer, the metal cations were dispersed in the solution and a homogeneous polymeric network was formed. The organic-inorganic precursor gels were turned to porous powder through an explosive oxidation reaction during a calcination process. The porous powders were crystallized to single phase of CaTiO3 at about 800 °C and the crystalline powders were planetary milled to nano-size.

Keywords: CaTiO3 powder, Ethylene glycol, Porous particles, Organic-inorganic solution technique, Nano-sized powder, Planetary milling.