Studies on Chemical Compositions and Water Solubilities of Glasses, (IX)
1951 Volume 59 Issue 656 Pages 61-65
Details
1951 Volume 59 Issue 656 Pages 61-65
The sample glass of common soda-lime-silica glass type was prepared from soda ash, calcium carbonate and pure silica, having the main compositions of Na2O 15%, CaO 13% and SiO2 72% (about Na2O. CaO. 5.2SiO2), and five special glass samples containing zirconia were prepared by displacing silica with 2, 4, 6, 8 or 10% of zirconia. These six glass samples were compared the water resisting property by the amount of dissolved alkali in water under the atmospheric pressure or the live steam pressure 8kg/cm2 (about 172°C), 17kg/cm2 (about 205°C), 25kg/cm2 (about 225°C) or 40kg/cm2 (about 251°C). From this alkali solubility test, the glass containing 8 or 10% of zirconia was confirmed to be the most stable form to the high pressure live steam, which will be suitable to the boiler gauge glass.
