Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium and glass spacer for magnetic recording and reproducing apparatus
US-2024321310-A1 · Sep 26, 2024 · US
Lithium Silicate Materials
US2016106526A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016106526-A1 |
| Application number | US-201514984490-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 30, 2015 |
| Priority date | Aug 7, 2003 |
| Publication date | Apr 21, 2016 |
| Grant date | — |
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- Title
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Abstract
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Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.
First claim
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1 . A process for manufacturing a lithium silicate dental glass-ceramic article comprising: preparing a lithium silicate blank comprising lithium metasilicate as the main crystalline phase and exhibiting a flexural strength of greater than 180 MPa; machining the lithium silicate blank into a dental article; and heat treating the machined dental article in the temperature range of from about 350° C. to about 850° C. 2 . A process for manufacturing a lithium silicate dental glass-ceramic article comprising: preparing a lithium silicate blank comprising lithium metasilicate as the main crystalline phase and exhibiting a flexural strength of greater than 180 MPa; machining the lithium silicate blank into a dental article; and applying a coating thereon. 3 . The process of claim 2 , wherein the coating comprises glass or a glass ceramic. 4 . A process for the preparation of a lithium silicate blank, which comprises: producing a melt of a starting glass containing the initial components SiO 2 Li 2 O, K 2 O, Al 2 O 3 and P 2 O 5 or other nucleation agent as the main components, pouring the melt of the starting glass into a mold to form a starting glass blank, subjecting the starting glass blank to heat treatment to obtain the lithium silicate blank with lithium metasilicate crystals as the main crystalline phase by heating the glass blank to a temperature in the range from about 450° C. to about 700° C. for a time between about 5 minutes and about 1 hour, and cooling the lithium silicate blank having the lithium metasilicate crystals as the main crystalline phase.
Assignees
Inventors
Classifications
comprising ceramics · CPC title
containing SiO2, Al2O3, Li2O as main constituents · CPC title
containing silica as main constituent · CPC title
Methods or devices for making crowns · CPC title
Blanks or green, unfinished dental restoration parts · CPC title
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Frequently asked questions
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- What does patent US2016106526A1 cover?
- Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.
- Who is the assignee on this patent?
- Ivoclar Vivadent Ag
- What technology area does this patent fall under?
- Primary CPC classification C03C3/097. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Apr 21 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).