Phase relationships in the system Si3N4–SiO2–Yb2O3
Source abstract
Abstract
Phase relationships in the system Si3N4−SiO2−Yb2O3have been investigated at 1750 °C and compared with those in the system Si3N4−SiO2−Y2O3. Two types of ytterbium silicon oxynitride, Yb2Si3O3N4(tetragonal) and Yb4Si2O7N2(monoclinic), were confirmed to exist. The x-ray powder diffraction data of two compounds were indexed based on the space group and unit cells. Melting temperature of Yb4Si2O7N2was determined as 1870 °C. Yb4Si2O7N2is a better intergranular phase of silicon nitride ceramics for its high melting temperature.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Inorganic Chemistry and Materials · Ferroelectric and Piezoelectric Materials
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References (20)
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