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As was observed in U.S. Pat. No. 3,790,260, supra, the presence of CaO in a glass composition tends to block or otherwise inhibit an ion exchange taking place between K+and Na+ions. That circumstance results in a shallower depth of the surface compression layer which, while providing ...
Examiner's Answer to Appeal Brief for U.S. Appl. No. 11/975,440 mailed Oct. 22, 2010, 17 pages. Final Office Action for U.S. Appl. No. 11/975,440 mailed Mar. 8, 2010, 10 pages. Non-final Office Action for U.S. Appl. No. 11/975,440 mailed Oct. 28, 2009, 7 pages....
U.S. Pat. No. 3,258,434 discloses the preparation of semiconducting glasses consisting essentially of B2O3with 20-40 mole percent of a glass network modifier selected from the group consisting of MgO, CaO, SrO, and BaO and at least 15 mole percent of a multivalent metal oxide selected fr...
Advisory Action for U.S. Appl. No. 12/697,628 mailed Mar. 1, 2012, 3 pages. Final Office Action for U.S. Appl. No. 12/697,628 mailed Nov. 17, 2011, 15 pages. Non-final Office Action for U.S. Appl. No. 12/697,628 mailed Apr. 6, 2011, 11 pages. Final Office Action...
SiO2 58-70 K2 O 3.8-7 Al2 O3 0.5-3 Li2 O 0.5-2 MgO 13-17.5 BaO 0-2.5 CaO 3-7 P2 O5 0-2.5 Na2 O 1.5-4 F 3-5.5 ___ U.S. Pat. No. 4,608,348 (Beall et al.) discusses glass-ceramics containing potassium fluorrichterite as the predominant crystal phase, but which ...
However, the sum of CaO+Na2O+K2O may be less than 1.0 wt. %, or even less than 0.5 wt %, and cristobalite development in the body should be limited to less than 1.0 wt %, or more preferably entirely avoided. When synthesized cordierite powders are selected for use in the batch, the...
% CaO. A further example glass composition suitable for the substrate comprises: 60-70 mol. % SiO2; 6-14 mol. % Al2O3; 0-15 mol. % B2O3; 0-15 mol. % Li2O; 0-20 mol. % Na2O; 0-10 mol. % K2O; 0-8 mol. % MgO; 0-10 mol. % CaO; 0-5 mol. % Zro2; 0-1 mol. ...
CaO 0.56 1.47 1.03 SrO 0.004 0.004 0.026 BaO 0.003 0.003 2.73 ZnO 0.000 0.000 0.97 Fe2O3 0.092 0.046 0.049 TiO2 0.028 0.018 0.027 ZrO2 0.033 0.032 0.038 As2O5 0.0003 0.0828 0.0003 Cl 0.0450 0.0020 0.0750 In some alternative embodiments, a glass container having a delamination factor of 10 ...