| 摘要 |
The present invention relates to a color cathode ray tube and a glass frit to be used for it, and provides a color cathode ray tube which uses a glass frit containing as a crystallizing filler, an alpha -4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular alpha -alumina, and at least one member selected from the group consisting of MgO, Fe2O3 and monoclinic ZrO2, for improvement of the strength at a sealed portion and for weight saving of the color cathode ray tube, wherein the maximum tensile stress generated at the above sealed portion is from 7 to 10 MPa when the inside is vacuumized, and the area ratio of crystal is at least 50% at the interface at the above sealed portion at at least the region at which the above maximum tensile stress is generated. |
