PbO-containing sealing glass with higher oxide of a cation to avoid PbO reduction
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-003/04
C03C-003/10
출원번호
US-0516900
(1974-10-22)
발명자
/ 주소
Francel Josef (Toledo OH) King James E. (Toledo OH) Woulbroun John M. (Grand Rapids OH)
출원인 / 주소
Owens-Illinois, Inc. (Toledo OH 02)
인용정보
피인용 횟수 :
25인용 특허 :
0
초록▼
A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains an effective amount of a powder, such as Pb3O4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing proce
A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains an effective amount of a powder, such as Pb3O4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. Among other powders similarly found to be effective for the purpose of prevention of reduction of PbO in a PbO-containing sealing glass frit are certain other higher oxides of a cation which are selected from a group including, in addition to Pb3O4, such higher oxides of a cation as BaO2, CrO3, MnO2, Mn2O3, Fe2O3, Fe3O4, CuO, Cu2O, Tl2O3, Sb2O5, TeO2, Ta2O5, Nb2O5, V2O5, CeO2, Bi2O3 and As2O5. A sealing glass paste consisting essentially of a PbO－ B2O3－ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb3O4, BaO2 or other of the mentioned higher oxide of a cation powder in the solder glass and paste made therewith, which Pb3O4, BaO2 or other of the mentioned higher oxides of a cation will be slowly reduced to a lower oxide in a reducing atmosphere during the sealing of the television tube components. A method for increasing the dielectric properties of a PbO-containing sealing glass paste and the devitrified seal made therefrom, which seals the face plate to the funnel of a color television tube, to a value greater than that provided by the solder glass, per se, by incorporating in the solder glass and the solder glass paste made therefrom a small but sufficient amount of Pb3O4, BaO2 or other of the mentioned higher oxide of a cation powders to accomplish this purpose. A vehicle for a glass frit comprises hydroxypropyl cellulose as a binder and a solvent for said binder.
대표청구항▼
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass frit is unreduced when said sealing glass frit is fired in the presence of reducing conditions and at temperatures at which said sealing glass frit seals said glass s
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass frit is unreduced when said sealing glass frit is fired in the presence of reducing conditions and at temperatures at which said sealing glass frit seals said glass surfaces together, said improvement comprising incorporating in said sealing glass frit a sufficient amount of a powder of a higher oxide of a cation which is stable at the temperatures at which said sealing glass frit seals said glass surfaces together and which can be reduced to a lower oxide of the cation when exposed to said reducing conditions, said lower oxide of said cation being compatible with the fired sealing glass, said higher oxide of said cation being selected from the group consisting of Pb3O4, BaO2, MnO2, Mn2O3, Fe3O4, CuO, Cu2O, Tl2O3, TeO2, Ta2O5, Nb2O5, V2O5, CeO2 and Bi2O3.
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이 특허를 인용한 특허 (25)
Lamberson, Lisa A.; Morena, Robert M., Antimony-free glass, antimony-free frit and a glass package that is hermetically sealed with the frit.
Aitken, Bruce G.; Carberry, Joel P.; DeMartino, Steven E.; Hagy, Henry E.; Lamberson, Lisa A.; Miller, II, Richard J.; Morena, Robert; Schroeder, III, Joseph F.; Streltsov, Alexander; Widjaja, Sujanto, Glass package that is hermetically sealed with a frit and method of fabrication.
Aitken, Bruce G.; Carberry, Joel P.; DeMartino, Steven E.; Hagy, Henry E.; Lamberson, Lisa A.; Miller, II, Richard J.; Morena, Robert; Schroeder, III, Joseph F.; Streltsov, Alexander; Widjaja, Sujanto, Glass package that is hermetically sealed with a frit and method of fabrication.
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