A process for making improved microwave susceptor comprising...

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 38/00 (2006.01) B65D 81/34 (2006.01) C04B 28/26 (2006.01) C04B 41/50 (2006.01) C04B 41/68 (2006.01) H05B 6/64 (2006.01)

Patent

CA 2241557

The present invention provides a process for making an improved thermally insulated microwave silicate foam susceptor. The process for making the improved microwave susceptor comprises the following steps: a) preparing pourable aqueous alkali metal dielectric sodium silicate slurry; b) pouring said slurry into a smooth surface substrate mold; c) heating said poured slurry at an effective elevated temperature to foam the slurry in said mold; d) drying said foam at an effective elevated temperature to provide said dry silicate foam substrate having a substantially smooth surface; e) coating at least a portion of said substantially smooth surface with an effective amount of a flowable microwave active material coating (MAC) and drying said flowable coating at an effective temperature to form a dry layer of said MAC.

L'invention porte sur un procédé de fabrication d'un suscepteur amélioré pour micro-ondes fait de silicate expansé isolant thermique. Ledit procédé comporte les étapes suivantes: (a) préparer un coulis aqueux de silicate de sodium diélectrique et d'un métal alcalin; (b) verser ce coulis dans un moule à substrat lisse; (c) chauffer le coulis à la température élevée requise pour l'expanser dans ledit moule; (d) faire sécher le coulis à la température élevée requise pour conférer au substrat de silicate expansé sec une surface sensiblement lisse; (e) revêtir au moins une partie de ladite surface sensiblement lisse d'une quantité requise d'un matériau fluide servant de revêtement activable par les micro-ondes (RAM) puis le faire sécher à la température requise pour en faire une couche de RAM.

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