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Colored machinable glass-ceramics

A machining and glass technology, applied in the field of colored glass ceramics that can be machined, can solve the problem that the material is not machined

Inactive Publication Date: 2011-05-04
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Colored wollastonite glass-ceramics are described in U.S. Patent No. 5,070,044, but these materials are not machinable materials

Method used

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  • Colored machinable glass-ceramics
  • Colored machinable glass-ceramics
  • Colored machinable glass-ceramics

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Embodiment Construction

[0019] When the composition of the present invention is described in the range 0-X wt%, it means the amount of the material added to the batch excluding the contaminant content of the material. As is known to those of ordinary skill in the art, contaminant levels of metals, such as iron, can often be found in formulated glass and glass-ceramic products. Therefore, when describing a certain amount in the batch as 0-X% by weight in these cases, it is understood to mean "added material", when "added material = 0% by weight", it means the final glass - These materials present in ceramic materials are contaminant materials.

[0020] As introduced above, a large number of machinable glass-ceramic compositions have been described in the prior art, including those based on the trisilicon mica crystal structure (US 3,689,293), the tetrasilicon mica structure (US 3,732,087 and 3,839,055), and alkali-free Those compositions of metallic mica structures (US 3,756,838). Table 1 summarizes...

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Abstract

The invention relates to opaque, colored glass ceramic articles and to the production of opaque, colored glass-ceramic articles which can be readily formed to a desired shape using standard metal-working tools. The glass-ceramic material used to make such articles contains mica crystals as the predominant phase. The desired color is obtained through the addition of a colorant system to the precursor glass. In a particular embodiment the invention is directed to a black glass ceramic article, the black color being obtained by the addition of iron oxides in levels as high as 20 wt%, which can yield a glass ceramic having an iron rice mica phase and / or a glass ceramic having an iron rich mica phase plus an iron oxide phase.

Description

[0001] Related Application Cross Reference [0002] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Patent Application Serial No. 61 / 049,614, filed May 1, 2008. technical field [0003] The present invention relates to colored machinable glass-ceramics that can be used as durable housings for electronic devices. In particular, the present invention relates to glass-ceramics containing mica phases that can be used as durable housings for electronic devices. Background technique [0004] Mica is classified as a phyllosilicate; its basic structural feature is a composite sheet in which a layer of octahedrally coordinated cations is sandwiched between two identical linked (Si,Al)O 4 between tetrahedral layers. The general formula of the mica structure can be found in "Dana's New Mineralogy" (John Wiley & Sons, New York, 1997), edited by R.V.Gaines et al., pp. 1444-1446. The structure can be written as: [0005] A 0-5 R 2-3 T 4 o 10 x 2 ,in: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
CPCC03C3/062C03C3/112C03C3/118C03C4/02C03C10/16Y10T428/24273
Inventor G·H·比尔L·R·平克尼S·A·蒂切
Owner CORNING INC
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