Abstract: 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 &agr;-4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular &agr;-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.

Abstract: 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 &agr;-4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular &agr;-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.

Abstract: A sealing composition having at least one member from &agr;-4PbO.B2O3 crystal powder and Pb3O4 powder incorporated in a total amount of from 0.0001 to 3 parts by weight to 100 parts by weight of a composition comprising at least 80 wt % and less than 98.99 wt % of a powder of PbO—ZnO—B2O3—SiO2 type crystalline low melting point glass, from 0.01 to 5 wt % of a zircon powder, more than 1 wt % and not more than 19.99 wt % of an &agr;-alumina powder and from 0 to 10 wt % of a low expansion ceramic filler.

Abstract: A low melting point glass consisting essentially of, as represented by mol % based on the following oxides: Mol % SnO   2 to 37.5, ZnO 5 to 73, P2O5 16 to 50,  Li2O 0 to 9,  Na2O 0 to 9,  K2O 0 to 9,  Al2O3 0 to 20, B2O3 0 to 30, SiO2 0 to 20, MgO 0 to 35, CaO 0 to 35, SrO 0 to 35, BaO 0 to 35, In2O3 0 to 10, WO3 0 to 10, wherein SnO+ZnO+P2O5+B2O3 is at least 76 mol %, Li2O+Na2O+K2O is from 0 to 9 mol %, MgO+CaO+SrO+BaO is from 0 to 35 mol %, and the molar ratio of SnO to ZnO is less than 1.

Abstract: A color cathode ray tube having a panel glass and a funnel glass sealed with a composition comprising a low melting glass containing PbO as the main component, wherein the sealed portion is such that the weight reduction after being immersed in water at 90.degree. C. for 20 hours, is at most 1 mg/cm.sup.2, and the weight reduction after being immersed in a 10% nitric acid solution at 40.degree. C. for 20 minutes, is from 80 to 700 mg/cm.sup.2.

Abstract: A hermetic sealing composition consisting essentially of from 90 to 99.95 wt % of a crystalline low melting glass powder and from 0.05 to 10 wt % of a low expansion ceramic filler powder, and having an average thermal expansion coefficient after firing of from 80.times.10.sup.-7 to 110.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C., wherein the crystalline low melting glass consists essentially of:______________________________________ PbO 71.5 to 78.0 wt % ZnO 10.5 to 14.5 wt % B.sub.2 O.sub.3 7.0 to 10.0 wt % SiO.sub.2 1.65 to 3.0 wt % BaO 0.1 to 1.95 wt % SrO 0 to 1.5 wt % CaO 0 to 1.5 wt % BaO + SrO + CaO 0.5 to 1.95 wt %, ______________________________________and contains substantially no fluorine, and the weight ratio of ZnO/PbO is within a range of from 0.14 to 0.20.

Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.

Abstract: A hermetic sealing composition consisting essentially of from 60 to 99 wt % of a bismuth type low melting glass powder and from 1 to 40 wt % of a low expansion ceramic filler powder, wherein the low melting glass has a composition consisting essentially of:______________________________________ Bi.sub.2 O.sub.3 77 to 95 wt %, MgO + ZnO 1 to 20 wt %, B.sub.2 O.sub.3 2 to 10 wt %, SiO.sub.2 0 to 1 wt % and CeO.sub.2 0 to 10 wt %.

Abstract: A plasma display panel comprising mutually opposing substrates and barrier ribs formed between adjacent pixels of a display between the substrates, wherein the barrier ribs are made of a fired product of a glass ceramic composition consisting essentially of a glass powder of P.sub.2 O.sub.5 type glass and a low expansion ceramic powder.

Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.

Abstract: A resistor paste comprising an inorganic component which consists essentially of from 20 to 70 wt % of glass powder and from 30 to 80 wt % of a powder selected from the group consisting of SnO.sub.2 power, Sb-doped SnO.sub.2 powder and a mixture thereof, wherein the glass powder consists essentially of from 12 to 50 wt % of SiO.sub.2, from 0 to 20 wt % of Al.sub.2 O.sub.3, from 0 to 40 wt % of MgO, from 0 to 40 wt % of CaO, from 0 to 60 wt % of SrO, from 16 to 60 wt % of MgO+CaO+SrO, from 0 to 10 wt % of Li.sub.2 O+Na.sub.2 O+K.sub.2 O+Cs.sub.2 O, from 0 to 10 wt % of PbO, from 0 to 20 wt % of ZnO, from 0 to 10 wt % of ZrO.sub.2 +TiO.sub.2, from 8 to 40 wt % of B.sub.2 O.sub.3, from 0 to 60 wt % of Ta.sub.2 O.sub.5, from 0 to 50 wt % of Nb.sub.2 O.sub.5, from 0 to 60 wt % of Ta.sub.2 O.sub.5 +Nb.sub.2 O.sub.5, and from 0.1 to 20 wt % of Fe.sub.2 O.sub.3 +CuO+NiO+CoO+MnO+MoO.sub.3 +WO.sub.3 +Cr.sub.2 O.sub.3 +Bi.sub.2 O.sub.3 +CeO.sub.2 +Sb.sub.2 O.sub.3 +In.sub.2 O.sub.3 +SnO.sub.2.

Abstract: A resistor paste comprising an inorganic component which consists essentially of from 20 to 70 wt % of glass powder and from 30 to 80 wt % of a powder selected from the group consisting of SnO.sub.2 power, Sb-doped SnO.sub.2 powder and a mixture thereof, wherein the glass powder consists essentially of from 12 to 50 wt % of SiO.sub.2, from 0 to 20 wt % of Al.sub.2 O.sub.3, from 0 to 40 wt % of MgO, from 0 to 40 wt % of CaO, from 0 to 60 wt % of SrO, from 16 to 60 wt % of MgO+CaO+SrO, from 0 to 10 wt % of Li.sub.2 O+Na.sub.2 O+K.sub.2 O+Cs.sub.2 O, from 0 to 10 wt % of PbO, from 0 to 20 wt % of ZnO, from 0 to 10 wt % of ZrO.sub.2 +TiO.sub.2, from 8 to 40 wt % of B.sub.2 O.sub.3, from 0 to 60 wt % of Ta.sub.2 O.sub.5, from 0 to 50 wt % of Nb.sub.2 O.sub.5, from 0 to 60 wt % of Ta.sub.2 O.sub.5 +Nb.sub.2 O.sub.5, and from 0.1 to 20 wt % of Fe.sub.2 O.sub.3 +CuO+NiO+CoO+MnO+MoO.sub.3 +WO.sub.3 +Cr.sub.2 O.sub.3 +Bi.sub.2 O.sub.3 +CeO.sub.2 +Sb.sub.2 O.sub.3 +In.sub.2 O.sub.3 +SnO.sub.2.