Ca_3(PO_4)_2-MgO-SiO_2系の相関系

概要

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A phase diagram in the three-component system C_3P-M-S was constructed. Abbreviations for oxide formulae are used as follows:C=CaO, M=MgO, P=P_2O_2 and S=SiO_2. Primary crystals are C_3P(α', α, β), diopside and pigeonite on the C_3P-MS join, and C_3P, sc(magnesium silicocarnotite, C_3M_2PS)and forsterite on the C_3P-M_2S join. Periclase appeared on the MgO corner, and tridymite, cristobalite and two liquids region appeared on the SiO_2 corner. A eutectic with the lowest temperature 1245℃ is located near the center portion where three crystals of β-C_3P, diopside and tridymite coprecipitate. The sc compound appeared in a spindle-shaped region and disappeared below 1360℃ to form β-C_3P and forsterite. It is concluded that the system C_3P-M-S consists of 4 composition triangles of C_3P-M-sc, sc-M-M_2S, C_3P-M_2S-MS and C_3P-MS-S containing 7 invariant points and this system is pseudo-binary.
社団法人日本セラミックス協会の論文
1998-05-01