Abstract
Phase relations in the lime-rich portion of the system CaO-B2O3-SiO2 have been studied by microscopy, infrared spectroscopy and X-ray powder diffraction of heated mixtures and quenched charges. Extensive solid solution of B2O3 in Ca2SiO4 occurs along the Ca2SiO4-Ca3B2O6 boundary, which has been studied in detail. It contains a ternary compound, Ca11B2Si4O22, which is stable to liquidus temperatures, melting incongruently to Ca2SiO4 and liquid at 1420 °C. Ca11B2Si4O22forms a eutectic with Ca3B2O6 at 1400 °C and, in the ternary system, with CaO and Ca3B2O6 at 1390 °C.
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Fletcher, J.G., Glasser, F.P. Phase relations in the system CaO-B2O3-SiO2 . JOURNAL OF MATERIALS SCIENCE 28, 2677–2686 (1993). https://doi.org/10.1007/BF00356203
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DOI: https://doi.org/10.1007/BF00356203