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1 results

  • Nuclei-growth optimization for fine-grained BaTiO3 by precision-controlled mechanical pretreatment of starting powder mixture

  • C. Ando, R. Yanagawa, H. Chazono, H. Kishi, M. Senna
  • Journal:
    Journal of Materials Research / Volume 19 / Issue 12 / December 2004
    Published online by Cambridge University Press:
    01 December 2004, pp. 3592-3599
    Print publication:
    December 2004

  • By a solid-state process, well-crystallized BaTiO3 (BT) particles with their average grain size below 0.2 μm were obtained. Wet and dry mechanical pretreatment processes were combined to obtain fine particulate mixture comprising BaCO3 and TiO2 with the highest possible homogeneity without causing appreciable agglomeration. Degree of homogenization was quantitatively evaluated by different microscopic techniques, in an attempt to optimize nuclei-growth processes. Reaction processes were discussed on the basis of thermal analyses in conjunction with the particulate morphology. The granulometrical and crystallographical properties of the present particulate products are comparable with or even superior to commercially available high-valued products fabricated via a hydrothermal or sol-gel route.