Effects of Chloride Ion on Densification Transparency Magnesia Ceramics

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  • 透光性マグネシア焼結体のち密化に及ぼす塩化物イオンの影響
  • 透光性マグネシア焼結体の緻密化に及ぼす塩化物イオンの影響
  • トウコウセイ マグネシア ショウケツタイ ノ チミツカ ニ オヨボス エンカブツ イオン ノ エイキョウ

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Abstract

A simple process was developed to produce transparent MgO ceramics. The Existence of chloride ion was one of the necessary conditions to produce highly transparent MgO ceramics. In this process, magnesium carbonate was initially precipitated by means of dropping magnesium chloride solution to a sodium carbonate solution. This magnesium carbonate solution was kept for 18h at 35°C and resulted in magnesium carbonate basic. 1 to 10 mol% of ammonium chloride was added to magnesium carbonate basic. And the powders were calcined at 900°C for 4 h. Doping of chloride ion resulted in the collapse of hard agglomerates. Sintering was carried out at 1600°C for 3 h in an oxygen atmosphere.<br>

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