| 摘要 |
PCT No. PCT/GB94/02105 Sec. 371 Date May 8, 1996 Sec. 102(e) Date May 8, 1996 PCT Filed Sep. 28, 1994 PCT Pub. No. WO95/09131 PCT Pub. Date Apr. 6, 1995A glass composition which is essentially free of lead and cadmium includes 30 to 70 wt % SiO2, 1 to 25 wt % B2O3, 0 to 10 wt % Al2O3, 0 to 5 wt % Bi2O3, 0.1 to 30 wt % CoO, 0.1 to 20 wt % ZnO, 1 to 30 wt % total of at least one of Li2O, Na2O or K2O, up to 10 wt % ZrO2 and other optional ingredients. The glass composition can be used as a blue colored on-glaze enamel which relies upon the presence of Co2+ in a network-forming position in the glass to produce the blue color, with oxygen donors such as ZnO2, alkaline earth oxides and alkali oxides increasing the amount of cobalt occupying network-forming positions, and ZrO2 to provide chemical durability.
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