MgO及びMgO-Al_2O_3系粉末成形体の焼結特性に及ぼすZrO_2の効果

概要

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Effect of ZrO_2 on the sintering charateristics of MgO powder compacts was studied. Addition of ZrO_2 enhanced the sinterability of the MgO powder compacts and decreased the sintering temperature by about 200℃. When a MgO powder compact with 10 mass%. ZrO_2 was heated, densification started at 1000℃, and its relative density reached about 98'%. at 1200℃. Addition of ZrO_2 to powder compacts with various ratios of MgO to Al_2O_3 also increased the sinterability. Particulary, the relative density in compositions containing excess MgO over the equimolar composition of MgO and Al_2O_3 increased. When a 40 mass% MgO-60 mass% Al_2O_3 powder compact was heated at 1500℃ for 2h, the addition of 1 mass% ZrO_2 improved the relative density from about 83% of the initial composition to about 97%.
社団法人日本セラミックス協会の論文
1997-08-01