Barium strontium titanate nanorods were synthesized in quaternary water/oil (W/O) microemulsion solution containing Triton X-100, cyclohexane, n-hexanol and water with Ba(OH)₂ and Sr(OH)₂ as reactants. The effects of different conditions such as ω₀ (the molar ratio of water to surfactant Triton X-100), reactant concentration and the aging time on the morphology and the size of the products were studied. The obtained products were characterized by TEM, SAED, SEM, EDS and XRD techniques. The results show that the prepared Ba_0.7Sr_0.3TiO₃ nanorods belonging to cubic phase are a single crystal structure with a length of 500～1200 nm and a diameter of 50～120 nm. The molar ratio of barium, strontium and titanate of products is about 0.7∶0.3∶1.

Key words: barium strontium titanate, reverse microemulsion method, nanorod