Al_2O_3-La_2O_3系の高温状態図

概要

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The liquidus curve in the system Al2O3-La2O3 was determined by the use of a heliostat type solar furnace. The cooling curves of melt specimens were obtained in the black body centrifugal cavity with an optical pyrometer. The quenched specimens were examined by X-ray technique and petrographic microscopy.Anomalies in the liquidus curve of the system were found in the region of 60.0 and 99.0mol% of La2O3. A composition of 80.0mol% La2O3 was further examined by high-temperature X-ray diffractometry, and the presence of a new orthorhombic phase was established.A tentative phase diagram for the Al2O3-La2O3 system at high temperatures is presented.
社団法人日本セラミックス協会の論文
1974-12-01