ChemInform Abstract: Dedensification and Anomalous Grain Growth During Sintering of Undoped Barium Titanate.

✍ Scribed by M. DEMARTIN; C. HERARD; C. CARRRY; J. LEMAITRE

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 31 KB
• Volume: 28
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199736009

✦ Synopsis

1997 mechanical properties, thermal properties mechanical properties, thermal properties D 3000

36 -009

Dedensification and Anomalous Grain Growth During Sintering of Undoped Barium Titanate.

-The dedensification during natural sintering of commercial BaTiO3 is studied by dilatometry. Solid-state and liquid-phase nucleation of abnormal grains is observed at low heating rates. The final grain size depends on the heating rate and the type of nucleation. Solid-state abnormal grain growth at temp. ¡ 1320 • does not lead to desintering while the onset of abnormal grain growth at ≈1320. degree. during sintering in the presence of a liquid phase results in a coarse-grained microstructure and dedensification. The latter is due to an expansion of the interconnected network during growth of large rounded grains at temp. ¿ 1320 • C and the induction of tensile stress on the porous fine-grained matrix.

-(DEMARTIN, M.;