Chemically strengthened bioactive glass-ceramics

Patent metadata

Field	Value
Publication number	US-10857259-B2
Application number	US-201816202786-A
Country	US
Kind code	B2
Filing date	Nov 28, 2018
Priority date	Nov 28, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A chemically strengthened bioactive glass-ceramic composition as defined herein. Also disclosed are methods of making and using the disclosed compositions.

First claim

What is claimed is:

1. A method of making a bioactive glass-ceramic article comprising:
forming a melt mixture of a source of:
50 to 75 wt % SiO 2 ,
1 to 5 wt % Al 2 O 3 ,
0.1 to 10% B 2 O 3 ,
5 to 20 wt % Li 2 O,
0.5 to 5 wt % Na 2 O,
0.1 to 4% K 2 O,
0.5 to 6 wt % P 2 O 5
0.5 to 8% ZrO 2 , and
0.1 to 1.0 wt % F − , based on a 100 wt % total of the composition to form a glass-ceramic article;

forming an article from the melt; and
accomplishing at least one chemical strengthening of the resulting glass-ceramic article.

2. The method of making a bioactive glass-ceramic article of claim 1 wherein the article comprises a pattie, a dimensioned portion cut from a pattie, a plurality of particles, a drawn sheet, a drawn fiber, or combinations thereof.

3. The method of making a bioactive glass-ceramic article of claim 1 further comprising annealing the article prior to accomplishing at least one chemical strengthening.

4. The method of claim 1 wherein the at least one chemical strengthening of the resulting glass-ceramic article is accomplished for a suitable time by ion exchanging in a NaNO 3 bath to exchange out lithium ions, exchanging in a KNO 3 bath to exchange out lithium ions and sodium ions from the surface of the article, or exchanging in a NaNO 3 and KNO 3 bath to exchange out lithium ions from the surface of the article.

5. The method of claim 1 wherein the bioactive glass-ceramic article has a bioactivity after ion-exchanging.

Assignees

• Corning Inc

Inventors

• Deng Huayun
• Fu Qiang
• Mauro John Christopher

Classifications

• C03C21/002 Primary

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03C3/112

  containing fluorine · CPC title

• C03C3/118

  containing aluminium · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title

• A61L24/02

  containing inorganic materials · CPC title