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Bismuth-base glass composition and bismuth-base material

A technology of bismuth-based glass and composition, which is applied in the manufacture of electrode system, exhaust connection/feeding, cathode ray/electron beam tube shell/container, etc. Solve problems such as filling and analysis, and achieve the effect of ensuring the reliability of airtightness and the thermal expansion coefficient is not easy to change.

Inactive Publication Date: 2009-09-09
NIPPON ELECTRIC GLASS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this crystallizable glass contains 13% by mass or more of B as a glass constituent (component that does not constitute a crystal) in the glass composition. 2 o 3 , and does not contain ZnO as a component constituting the crystal, therefore, even if the heat treatment is carried out, the crystal is not sufficiently precipitated, and the glass is easy to soften again in the heat treatment process after the crystal precipitation. In the above-mentioned problem of glass resoftening
[0011] Furthermore, in general, bismuth-based glasses are less thermally stable than lead-boric acid-based glasses, that is, they tend to devitrify at high temperatures, and it is difficult to control the precipitation of crystals.

Method used

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  • Bismuth-base glass composition and bismuth-base material
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  • Bismuth-base glass composition and bismuth-base material

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Embodiment Construction

[0036] In the bismuth-based glass composition of the present invention, the reason for limiting the glass composition range as described above is as follows. In addition, the following % shows mass % except the case where it is specifically limited.

[0037] Bi 2 o 3 It is a main component for lowering the softening point of glass, and it is also a component that becomes a structural component of precipitated crystals. Its content is 60-84%, preferably 65.1-79.9%, more preferably 67-79.3%, further preferably 72-77%, especially preferably 75-less than 77%. If Bi 2 o 3 If the content of Al is less than 60%, the softening point will rise, and it will be difficult to seal at a temperature below 500°C. If Bi 2 o 3 If the content of α is greater than 84%, the devitrification resistance of the glass will deteriorate, and before softening in the sealing process, crystals will precipitate on the glass, making it difficult to function as a sealing material.

[0038] B 2 o 3 It...

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Abstract

The invention provides a bismuth-base glass composition which can be well softened in heat treatment such as sealing and can crystallize satisfactorily after being softened and which is little re-softened after crystallization in heat treatment such as evacuation. A bismuth-base glass composition characterized by having a composition which comprises by mass 60 to 84% of Bi2O3, 5.4 to 15% of B2O3, 10 to 27% of ZnO, 0 to 7% of CuO, and 0 to 5% of Fe2O3 and contains BaO, SrO, MgO and CaO in a total amount of 0 to 10% and SiO2 and Al2O3 in a total amount of 0 to 5% and being substantially free from PbO.

Description

technical field [0001] The present invention relates to flat display devices such as plasma display panels (hereinafter referred to as PDP), various forms of field emission displays (hereinafter referred to as FED) having various electron emitting elements, fluorescent display tubes (hereinafter referred to as VFD), crystal vibrators, A bismuth-based glass composition and a bismuth-based material suitable for sealing electronic components such as IC packages (including housing containers for electronic components), forming partition walls, forming side frames, and the like. Background technique [0002] Conventionally, glass has been used as a sealing (sealing) material for flat panel display devices and the like. Glass is superior in chemical durability and heat resistance compared to resin-based adhesives, and is suitable for ensuring airtight reliability of flat-panel display devices and the like. [0003] These glasses require various properties such as mechanical stren...

Claims

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Application Information

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IPC IPC(8): C03C8/04C03C8/24H01J9/26H01J11/02H01J29/86C03C10/02H01J11/46H01J11/48H01J11/54
CPCH01J29/864H01J17/18H01J17/16C03C8/04C03C8/24H01J9/38H01J29/86H01J11/34
Inventor 堀本正幸石原健太郎
Owner NIPPON ELECTRIC GLASS CO LTD
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