| 摘要 |
A dielectric material for plasma display panels which comprises a ZnO-BO-SiO-BiO-RO lead-free glass powder and which, despite this, gives a highly transparent dielectric layer on a glass substrate having a silver electrode formed thereon. The dielectric layer is less apt to have yellowed and has a coefficient of thermal expansion compatible with the glass substrate. The dielectric material can be burned at 600°C or lower. Also provided are: a method of forming a dielectric layer; a dielectric layer formed from the dielectric material; and a glass plate for plasma display panels which has the dielectric layer. The dielectric material for plasma display panels comprises a glass powder based on ZnO-BO-SiO-BiO-RO (wherein RO represents alkali metal oxides comprising LiO, NaO, and KO). It is characterized in that the glass powder contains substantially no PbO and is made of a glass which comprises, in terms of percentage by mass, 45-85% ZnO+BO+SiO, 10-25% BiO, 0.1-10% RO, and 0.01-0.30% CoO, the RO/BiOratio being 0.05-0.80 by mass.
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