Glass for projection kinescope tube panel

A kinescope and glass technology, which is applied in the field of glass for projection kinescope tube screens, can solve problems such as damaged tube life, low X-ray absorption coefficient, and inability to appear yellow

Inactive Publication Date: 2004-06-30
天津津京玻壳股份有限公司
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Problems solved by technology

[0003] ① In order to ensure the high brightness of the large screen of the projection screen, the glass should have a high transmittance. The transmittance T of the 546nm wavelength and 10.16mm thick sample is > 89%, and the appearance cannot appear yellow. The yellow color is caused by the absorption of blue light by the gl

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  • Glass for projection kinescope tube panel

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Embodiment Construction

[0020] The present invention relates to a kind of R2O-Ba(SrO)-ZnO-ZrO2-SiO2 system glass for projection picture tube screen, its glass composition range (weight) is: SiO 2 50-60, Al 2 o 3 0.1~1.0 Li 2 O 0.5~2.5, Na 2 O2~5,K 2 O6~12, Li 2 O+Na 2 O+K 2 O 13~20,K 2 O / Li 2 O+Na 2 O+K 2 O 0.5~0.7, BaO 10~15, SrO 3~10, BaO+SrO 15~24, ZnO 5~7, ZrO 2 1 to 3, CeO 2 0.3~1,TiO 2 0.25~1, CeO 2 +TiO 2 0.6~1.5, Sb 2 o 3 0.5~1.2, Fe 2 o 3 <0.020

[0021] In order to meet the requirements for projection tube glass and overcome the deficiencies of existing glass, the present invention proposes R 2 O-BaO(SrO)-ZnO-ZrO 2 -SiO 2 System glass, and add anti-tarnish component CeO 2 and TiO 2 and clarifying agent Sb 2 o 3 , the content of the present invention is

[0022] 1. In the alkali metal oxide Li 2 O, Na 2 O, K 2 The appropriate content of O and K 2 O / Li 2 O+Na 2 O+K 2 Under the condition of proper ratio of O, it can effectively improve the resistance to ...

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Abstract

The composition of R2O-BaO (SrO)-ZnO-ZrO2-SiO2 system glass for projection kinescope tube screen is formed from (weight%): SiO2 50-60, Al2O3 0.1-1.0, Li2O 0.5-2.5, Na2O 2-5, K2O 6-12, Li2O+Na2O+K2O 13-20, K2O/Li2O+Na2O+K2O 0.5-0.7, BaO 10-15, SrO 3-10, BaO+SrO 15-24, ZnO 5-7, ZrO2 1-3, CeO2 0.3-1, TiO2 0.25-1, CeO2+TiO2 0.6-1.5, Sb2O3 0.5-1.2, Fe2O3 is less than or equal to 0.020 and the CeO2 and TiO2 are introduced. It has good anti-electron-bombardment discolouration capability and x-ray irradiation discolouration capability, its 0.6A wavelength X-ray absorption coefficient mu is greater than 37 cm (-1), and its melting clarification temp. is less than 1400 deg.C, so that it has good precision press-forming capability.

Description

technical field [0001] The invention belongs to the glass used for the tube screen of a picture tube, in particular to a glass used for the tube screen of a projection picture tube. Background technique [0002] The so-called projection TV has two types: front projection type and rear projection type. It is composed of three projection tubes of red, green, and blue. It is a color TV image, which has the advantages of large screen, high definition and high brightness. Due to the limited screen size of traditional direct-view CRT (anode ray tube) TVs, when the screen size is larger than 86cm, it is not economically feasible, and projection TVs, especially rear-projection projection TVs, can easily reach a size of more than 101cm Screens have been commercialized at present. Compared with large-screen PDP and LCD TVs, they are cheap, bright, and easy to maintain, so they have considerable advantages. The technical requirements for the screen glass of the ordinary direct-viewin...

Claims

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Application Information

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IPC IPC(8): C03C3/095C03C4/08H01J29/86
CPCC03C4/087C03C3/095
Inventor 赵建刚易家吉张桐刘莉萍屈源
Owner 天津津京玻壳股份有限公司
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