High strain point glass.

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A family of glasses from the rare earth alumino-silicate (RE2O3-Al2O3-SiO2) ternary system exhibiting high strain point and low liquidus temperatures; preferably the La2O3-Al2O3-SiO2 ternary system. The glasses are excellent candidates for electronics applications and have the following composition, expressed in mole percent and calculated from the glass batch on an oxide basis : 60-85% SiO2, 10-25% Al2O3, and 4-15% RE2O3.