Preparation Techdnique of High-Porosity Ceramics.

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  • 高気孔率多孔質セラミックスの製造法
  • コウキコウリツ タコウシツ セラミックス ノ セイゾウホウ

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A new technique has been developed for preparing high porousity ceramics. Spray freeze drying of magnesium sulfate aqueous solution produced porous fine salt particles, which were calcined to porous particles of magnesium oxide. The oxide particles were treated to form magnesia ceramics that showed high porosity in a range of 0.50.85.<BR>The following equation which can assess ceramics strength for high porosity is proposed.σ=σo (1-αε) m<BR>where σ [Nm-2] strength, ε [-] porosity and σo, α, m constants. The validity of the equation is confirmed by the present investigation data and also the ones published.

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