HEAT-RESISTANT, CORROSION-RESISTANT GLASS

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PROBLEM TO BE SOLVED : To provide glass that can be kept under high-temperature conditions, is characterized by a high resistance to corrosion caused by water condensed from exhaust gas and a low thermal expansion coefficient and is thus suitable for use in environments subject to exhaust gas exposure. SOLUTION : The glass shows ≤0.1% mass reduction when immersed at 80°C for 520 h in water condensed from exhaust gas, a thermal expansion coefficient of ≤50×10-7/°C and a transition point of ≥650°C. The glass includes, calculated in terms of oxides, 25-65 wt.% SiO2, 5-30 wt.% Al2O3, 5-25 wt.% alkaline earth oxides, 5-25 wt.% ZrO2 and 0-20 wt.% rare earth oxides. The glass is suitably used for coating, bonding, etc. of members used in environments subject to exhaust gas exposure. COPYRIGHT : (C)2011, JPO&INPIT