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Lithium disilicate glass-ceramic, its production method and its use

A glass ceramic, lithium disilicate technology, used in pharmaceutical formulations, photometry using electrical radiation detectors, dental preparations, etc., to achieve the effect of improving chemical stability and high strength values

Active Publication Date: 2016-08-10
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] All known lithium disilicate glass-ceramics exhibit deficiencies: in their handling into shaped products; and / or in mechanical or visual properties; and / or in chemical stability

Method used

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  • Lithium disilicate glass-ceramic, its production method and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 6

[0029] In Examples 1-6, glass compositions with high zirconia content are shown, which are transformed by a two-step temperature treatment: first into an easily machined lithium metasilicate glass-ceramic; subsequently Transforms into a highly translucent, very strong and chemically stable lithium disilicate glass-ceramic.

[0030] In Table 1 the compositions and their components are shown.

[0031] Table 1

[0032] B1

B2

B3

B4

B5

B6

SiO 2

66.9

65.8

65.5

63.7

63.5

63.5

Li 2 o

13.9

13.7

13.6

13.2

14.4

12.9

ZrO 2

10.0

10.0

12.0

11.7

12.7

13.5

Al 2 o 3

3.2

3.1

3.1

3.0

3.3

3.5

P 2 o 5

3.0

3.0

3.0

2.9

3.1

3.4

K 2 o

2.9

2.9

2.9

2.8

3.0

3.2

CeO 2

-

1.0

-

2.0

-

-

Er 2 o 3

-

0.2

-

0.3

-

-

Tb 2 o 3

-

0.3

-

0.3

-

- ...

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Abstract

The present invention relates to a glass-ceramic based on a lithium disilicate system which is easily machined in an intermediate crystallization step and which, after complete crystallization, behaves as a high-strength, highly translucent and chemically stable glass-ceramic. Furthermore, the invention also relates to a method for producing said glass ceramics. The glass ceramics according to the invention are used as dental materials.

Description

technical field [0001] The present invention relates to a glass-ceramic based on a lithium disilicate system which is easily machined in an intermediate crystallization step and which, after complete crystallization, behaves as a high-strength, highly translucent and chemically stable glass-ceramic. Furthermore, the invention also relates to a method for producing said glass ceramics. The glass ceramics according to the invention are used as dental materials. Background technique [0002] The lithium disilicate glass-ceramics known from the literature and some patents are based on this glass-ceramic system. Thus, for example, in EP-B-536479 a self-glazed (self-glazed) lithium disilicate glass-ceramic body for the production of tableware is described, and in EP-B-536572 it is described Lithium disilicate glass-ceramics used as building lining units for stained glass. [0003] Lithium disilicate glass-ceramics for which patents have been granted are mainly focused on dental...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00A61C13/00C03B32/02C04B41/00A61C5/35A61C5/70A61C5/77
CPCC03B32/02A61C5/35A61C5/70A61C5/77C03C3/097C03C4/0021C03C10/0027G01J1/44A61K6/82A61K6/816A61K6/824A61K6/822A61K6/833A61K6/78A61K6/818C03C10/00A61C13/00C04B41/00A61C13/083A61C13/0006A61C13/01
Inventor 伯恩哈德·杜莎昂约恩·普罗布斯特诺贝特·蒂尔约阿希姆·比布斯马库斯·福尔曼尤多·许塞尔
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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