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Nonlead glass composition

A lead-free glass and composition technology, applied in the direction of inorganic insulators, ceramics, electrical components, etc., can solve the problems of increasing the softening point, peeling off, and not being able to improve the acid resistance of the glass, and achieve the effect of good acid resistance and good acid resistance

Inactive Publication Date: 2008-10-01
NIHON YAMAMURA GLASS
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Problems solved by technology

However, neither of Patent Documents 1 and 2 can improve the acid resistance of glass itself.
[0010] In addition, in the above-mentioned Patent Document 3, it is attempted to adjust ZnO and Al in the zinc-bismuth borosilicate glass. 2 o 3 content to improve the acid resistance of glass, but there is a problem that the softening point is higher than that of lead-based glass, and the peeling problem caused by acid resistance has not been solved so far.

Method used

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Examples

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Effect test

Embodiment 1～5 and comparative example 1～5

[0060] Prepare and mix the raw materials of Examples 1-5 according to the composition shown in Table 1, put them into a platinum crucible, melt them at 1200-1300° C. for 2 hours, and flow them out into a mold to make a glass block. Further, the molten glass was rapidly cooled to obtain glass flakes. The glass flakes and ion-exchanged water were put into a pot mill, wet-milled until the average particle size became 0.8-0.9 μm, and then dried by hot air drying to produce glass powder.

[0061] Similarly, glass powders of Comparative Examples 1 to 5 were prepared so as to have the component compositions shown in Table 2.

[0062] About each Example and a comparative example, glass load softening point Td (degreeC) and acid resistance were measured. In addition, the identification of the precipitate was performed about an Example.

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Abstract

A non-lead glass composition that solving the problem of conventional Bi2O3 glass with respect to glass softening point and acid resistance, not only can retain the same level of softening point as that of conventionally employed lead glass but also realizes excellent acid resistance. There is provided a nonlead glass composition comprising, in terms of oxide, 55 to 75 wt.% Bi2O3, 5 to 15 wt.% B2O3, 4 to 12 wt.% SiO2, 3 to 12 wt.% ZnO, 3 to 10 wt.% Al2O3 and 0.1 to 5 wt.% ZrO2.

Description

technical field [0001] This invention relates to lead-free glass compositions. More specifically, it relates to a lead-free glass composition used for forming, bonding, covering or sealing electronic parts requiring acid resistance. More specifically, it relates to a glass composition of lead-free glass added to conductor wiring portions such as Ag conductors requiring acid resistance of plasma display panels or lead-free glass used for surface protection of electronic parts and elements requiring acid resistance . Background technique [0002] In display devices such as plasma display panels, for example, glass powder and Ag powder are mixed and sintered to form conductors used for wiring, or glass is used for surface protection of elements, and the like. Glass is usefully used. Conventionally, lead-based glasses have been mainly used as these glasses, but in recent years, there is a tendency to avoid the use of lead-containing products from the viewpoint of the environme...

Claims

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Application Information

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IPC IPC(8): C03C8/04C03C8/18C03C10/02C03C10/04H01B3/12H01J11/02H01J11/22
CPCC03C3/072C03C4/20C03C3/066H01J2211/225
Inventor 真弓祯隆
Owner NIHON YAMAMURA GLASS
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