Borosilicate glass for pharmaceutical container and glass tube for pharmaceutical container
US-10099956-B2 · Oct 16, 2018 · US
Glasses having improved ion exchangeability and thermal expansion
US12162802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12162802-B2 |
| Application number | US-201815891723-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 8, 2018 |
| Priority date | Feb 8, 2017 |
| Publication date | Dec 10, 2024 |
| Grant date | Dec 10, 2024 |
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- Title
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Abstract
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The present invention relates to glasses having a composition made up of base glasses. The glasses have a good chemical toughenability in combination with an advantageous coefficient of thermal expansion. Owing to their composition and the production process, the homogeneity of the properties of the glasses at their surface is high compared to the bulk glass. Furthermore, the fragility of the glasses is low, so that they can be processed to produce very thin glass articles.
First claim
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What is claimed is: 1. A glass, having a composition which is characterized by the following constituent phases: A constituent phase min. max. Albite 10 mol % 40 mol % Reedmergnerite 10 mol % 65 mol % Potassium reedmergnerite 0 mol % 32 mol % Grossular 0 mol % 10 mol % Cordierite 0 mol % 10 mol % Willemite 0 mol % 15 mol % Silicon dioxide 0 mol % 50 mol % Diboron trioxide 0 mol % 15 mol % Titanium wadeite 0 mol % 24 mol % Strontium feldspar 0 mol % 20 mol % Celsian 0 mol % 20 mol % wherein a number of degrees of angular freedom per atom is calculated according to a formula: f = ∑ i = 1 n c i · z i · f i ∑ i = 1 n c i · z i , ( 1 ) wherein f is the number of degrees of angular freedom per atom, c i is a mole fraction of the i-th constituent phase, z i is a number of atoms per structural unit in the i-th constituent phase, f i is a number of degrees of angular freedom per atom in the i-th constituent phase, and “n” is a number of constituent phases, such that said number of degrees of angular freedom per atom is not more than 0.29, wherein a coefficient of thermal expansion is calculated according to formulae: E pot _ = ∑ i = 1 n c i · ∑ j = 1 m z i , j · E pot , j ∑ i = 1 n
Assignees
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Classifications
After-treatment · CPC title
Melting processes · CPC title
containing PbO, SnO2, B2O3 · CPC title
containing aluminium · CPC title
by drawing (C03B23/02, C03B23/04, C03B23/18 take precedence) · CPC title
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- What does patent US12162802B2 cover?
- The present invention relates to glasses having a composition made up of base glasses. The glasses have a good chemical toughenability in combination with an advantageous coefficient of thermal expansion. Owing to their composition and the production process, the homogeneity of the properties of the glasses at their surface is high compared to the bulk glass. Furthermore, the fragility of the g…
- Who is the assignee on this patent?
- Schott Ag
- What technology area does this patent fall under?
- Primary CPC classification C03C3/093. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 10 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).