The reactions of Si3(PO4)4 with CaO and MgO at high temperatures up to 1150 °C yielded silicon phosphate glass, Me3(PO4)2, Me2P2O7, and α-cristobalite, depending on the temperature, the heating time, and the MeO/Si3(PO4)4 molar ratio (Me: Ca and Mg). These reactions were found to proceed by means of the one-way diffusion of alkaline earth metal oxides into the Si3(PO4)4 phase.

中文翻译：

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磷酸硅与碱土金属氧化物在高温下的反应

Si3(PO4)4 与 CaO 和 MgO 在高达 1150 °C 的高温下反应生成磷酸硅玻璃、Me3(PO4)2、Me2P2O7 和 α-方石英，这取决于温度、加热时间和 MeO /Si3(PO4)4 摩尔比（Me：Ca 和 Mg）。发现这些反应是通过碱土金属氧化物单向扩散到 Si3(PO4)4 相中进行的。