Abstract
Effects of process parameters on nonhydrolytic sol-gel synthesis of Ba0.6Sr0.4TiO3 were systematically investigated. It is discovered that the optimized concentration is 0.8 mol/L. Fine concentration has no obvious effect on low-temperature synthesis of Ba0.6Sr0.4TiO3, but coarse concentration greatly affects the synthesis rate of Ba0.6Sr0.4TiO3. The impurity phase BaCO3 caused by the volatilization of titanium source (Ti(OC4H9)4) can be effectively eliminated by adjusting Ba–Sr–Ti mole ratio to 0.6:0.4:1.2. The pure phase of Ba0.6Sr0.4TiO3 can be synthesized at low temperature of 600 °C with the optimized process parameters due to the formation of Ba–O–Ti and Sr–O–Ti bonds in the xerogel. The particle size of Ba0.6Sr0.4TiO3 powder is 17–43 nm with the monocrystalline structure.
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