酸化ジルコニウム粉体上へのパラジウムの無電解めっきとめっき物の熱的挙動

概要

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The feasibility of the electroless plating of Pd onto ZrO2 powder from a bath containing thiodiglycolic acid and ethylenediamine and using sodium hypophosphite as a reducing agent has been demonstrated Sintering of the deposited Pd on ZrO2 occurred at about 900°C, considerably higher than the 550°C sintering temperature of pure Pd powder, and this was attributed to the presence of thermally stable ZrO2 in the interstices of the Pd deposits, interfering with Pd atom migration When heated in air, the deposited Pd began to oxidize at 280°C, about 220 deg lower than did the pure Pd powder This was due to the smaller particle size, for when particle size was increased by sintering, the oxidation temperature was found to be the same as pure Pd powder
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