Resumo

VIEIRA, Delia do Carmo; CARDOSO, Celso Xavier  e  DURAN, Rafael Matos. Thermal analysis and sintering process of KSr₂Nb₅O₁₅ ceramic doped with CuO. Quím. Nova [online]. 2009, vol.32, n.7, pp.1704-1709. ISSN 1678-7064.  http://dx.doi.org/10.1590/S0100-40422009000700004.

KSr₂Nb₅O₁₅ is a ferroelectric material. The sintering process of the KSr₂Nb₅O₁₅ ceramic doped with different amounts of CuO was investigated in this research. It was found that CuO is effective as promoter of the densification process of the KSN ceramic. The developed microstructures were different due to the amount of CuO and secondary phases were observed in the microstructures. However, the results of X - ray diffraction showed that only the tetragonal tungsten bronze (TTB) structure was identified in all the investigated ceramic systems. The thermal behavior of CuO and also of the CuO - KSN phase mixture was investigated by thermal analysis.

Palavras-chave : TTB niobates; thermal analysis; liquid phase sintering.

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