Effect of processing variables on synthesis of beta-Sisub(3)Nsub(4) particles
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Journal of the European Ceramic Society
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Synthesis of highly anisotropic rod-like -Si3N4 particles with different morphological characteristics was accomplished using commercial -Si3N4.
A number of powder mixtures were prepared with additions of various oxides (Al2O3 + RE2O3, being RE = Y, La or Yb) that were subsequently
heat treated in a loose powder state in the temperature range of 1750–1950 ◦C and dwell times from 10 to 180 min under high pressure of N2
(60 MPa) in a hot isostatic press. The obtained aggregated porous bodies were lightly crushed by hand using an alumina mortar and pestle and
subsequently subjected to sequential chemical treatments to eliminate the glassy phases and possible residual crystalline compounds, and to separate
the synthesized -Si3N4 particles. Resulting -Si3N4 particles were characterized by X-ray diffraction and examined by scanning and transmission
electron microscopy. Morphological characteristics of the synthesized -Si3N4 particles were determined through quantitative dimensional analysis.
The effect of amount and chemical composition of oxide additives responsible for liquid phase formation as well as heat treatment parameters on
-Si3N4 particles size and morphology are established. Possible mechanisms of -Si3N4 particles growth are discussed.
Como referenciar
GENOVA, LUIS A.; IZHEVSKYI, VASSYLI A.; BRESSIANI, JOSE C. Effect of processing variables on synthesis of beta-Sisub(3)Nsub(4) particles. Journal of the European Ceramic Society, v. 28, p. 295-301, 2008. DOI: 10.1016/j.jeurceramsoc.2007.06.012. Disponível em: http://repositorio.ipen.br/handle/123456789/5087. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.