The calculation of the optimum pH range for synthesizing BST nanopowders by sol–gel auto-combustion process
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The optimum pH range for synthesizing barium strontium titanate (Ba0.5Sr0.5TiO3, BST) nanopowders by sol–gel auto-combustion method was calculated based on the principles of matter balance and charge balance. The effectiveness of the calculation was proved by the successful synthesis of highly dispersive, spherically shaped and pure BST nanoparticles with setting the pH in the range pre-decided by theoretical evaluation. Ours might have provided an effective path for pre-deciding the solution pH in synthesizing various oxide nanopowders by sol–gel auto-combustion method.
KeywordsBarium strontium titanate (BST) Sol–gel auto-combustion method pH range
This work was supported by National Natural Science Foundation of China (No. 10574112). Guangxi Natural Science Fund, China (Grant No. 0832257) and the Research Foundation of Education Bureau of Guangxi Province, China (Grant No. 200708LX333).