Preparation of dense nanostructured functional oxide...

Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate

Reexamination Certificate

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C419S045000, C419S048000, C419S051000, C419S052000, C427S458000, C427S591000

Reexamination Certificate

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07601403

ABSTRACT:
A method for preparing highly dense functional oxides with crystallite size in the range of 10-20 nm. Using a high pressure modification of a the Spark Plasma Sintering (SPS) technique, rapid thermal cycles (<10 min) coupled with very rapid pressure increase up to 1 GPa can be obtained allowing high degree of compaction and very limited grain growth. This combination of techniques was employed to produce the finest-grained ceramics ever prepared in bulk form in the case of fully stabilized zirconia and Sm-doped Ceria.

REFERENCES:
patent: 5794113 (1998-08-01), Munir et al.
patent: 6261420 (2001-07-01), Kubota et al.
Kim et al., Effect of initial particle size on microstructure of liquid-phase sintered alpha-silicon carbide, 2000, Journal of European Cermic Society, vol. 20, pp. 945-949.

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