Abstract
In this study, we successfully synthesized a nano-sized lanthanum-modified lead-titanate (PLT) powder with a perovskite structure using a high-energy mechanochemical process (MCP). In addition, the sintering behavior of synthesized PLT nanopowder was investigated and the sintering temperature that can make the full dense PLT specimen decreased to below <TEX>$1050^{\circ}C$</TEX> by using <TEX>$Bi_2O_3$</TEX> powder as sintering agent. The pure PLT phase of perovskite structure was formed after MCP was conducted for 4 h and the average size of the particles was approximately 20 nm. After sintered at 1050 and <TEX>$1150^{\circ}C$</TEX>, the relative density of PLT was about 93.84 and 95.78%, respectively. The density of PLT increased with adding <TEX>$Bi_2O_3$</TEX> and the specimen with the relative densitiy over 96% were fabricated below <TEX>$1050^{\circ}C$</TEX> when 2 wt% of <TEX>$Bi_2O_3$</TEX> was added.
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