Glass-ceramic compositions and methods of making thereof
A silicate-based composition includes: 40-80 mol % SiO 2 , >0-25 mol % MO, 15-40 mol % R 2 O, >0-10 mol % Al 2 O 3 , >0-10 mol % P 2 O 5 , and >0-5 mol % ZrO 2 , such that MO is a sum of BeO, MgO, CaO, SrO, and BaO; and R 2 O is a sum of Li 2 O, Na 2 O, K 2 O, Rb 2 O, Cs 2 O.
1 . A glass-ceramic composition, comprising:
40-80 mol % SiO 2 ,
>0-25 mol % MO,
15-40 mol % R 2 O,
>0-10 mol % Al 2 O 3 ,
>0-10 mol % P 2 O 5 , and
>0-5 mol % ZrO 2 ,
wherein MO is a sum of BeO, MgO, CaO, SrO, and BaO;
wherein R 2 O is a sum of Li 2 O, Na 2 O, K 2 O, Rb 2 O, Cs 2 O; and
wherein the glass-ceramic comprises lithium disilicate, apatite, and diopside phases.
2 . The glass-ceramic composition of claim 1 , further comprising:
>0-5 mol % F − .
3 . The glass-ceramic composition of claim 1 , comprising:
15-30 mol % Li 2 O; and
>0-10 mol % a sum of Na 2 O and K 2 O.
4 . The glass-ceramic composition of claim 1 , comprising:
>0-15 mol % CaO; and
>0-10 mol % MgO.
5 . The glass-ceramic composition of claim 4 , wherein:
a sum of P 2 O 5 and CaO is 1-15 mol %, or
a ratio of CaO:P 2 O 5 is 1:1 to 10:1.
6 . The glass-ceramic composition of claim 1 , further comprising:
>0-10 mol % B 2 O 3 .
7 . A glass-ceramic composition, comprising:
50-70 mol % SiO 2 ,
>0-25 mol % MO,
15-40 mol % R 2 O,
>0-5 mol % Al 2 O 3 ,
0.5-5 mol % P 2 O 5 , and
>0-5 mol % ZrO 2 ,
wherein MO is a sum of MgO and CaO;
wherein R 2 O is a sum of Li 2 O, Na 2 O, and K 2 O; and
wherein the glass-ceramic comprises lithium disilicate, apatite, and diopside phases.
8 . The glass-ceramic composition of claim 7 , comprising:
15-30 mol % Li 2 O,
>0-5 mol % Na 2 O, and
>0-5 mol % K 2 O.
9 . The glass-ceramic composition of claim 7 , comprising:
>0-10 mol % MgO, and
>0-15 mol % CaO.
10 . The glass-ceramic The silicate-based composition of claim 7 , further comprising:
0.2-5 mol % F − .
11 . The glass-ceramic The silicate-based composition of claim 7 , further comprising:
>0-5 mol % B 2 O 3 .
12 . The glass-ceramic composition of claim 1 , wherein the glass-ceramic composition has a fracture toughness in a range of 2-4 MPa·M 1/2 .
13 . The glass-ceramic composition of claim 1 , wherein the silicate-based composition is a particle, bead, particulate, short fiber, long fiber, woolen mesh, combination thereof.
14 . The glass-ceramic composition of claim 13 , wherein the glass-ceramic composition has at least one size dimension in a range of 1-100 μm.
15 . A matrix comprising the glass-ceramic composition of claim 1 , wherein:
the matrix includes at least one of: dental bridges, dental enamel, dental filling material, bone filling material, orthopedic implants.
16 . An antibacterial composition comprising the glass-ceramic composition of claim 1 .
17 . A bulk nucleation process, comprising:
heating at temperatures ranging 600-1000° C. for a predetermined time, a silicate-based composition comprising:
40-80 mol % SiO 2 ,
>0-25 mol % MO,
15-40 mol % R 2 O,
>0-10 mol % Al 2 O 3 ,
>0-10 mol % P 2 O 5 , and
>0-5 mol % ZrO 2 ,
wherein MO is a sum of BeO, MgO, CaO, SrO, and BaO; and
wherein R 2 O is a sum of Li 2 O, Na 2 O, K 2 O, Rb 2 O, Cs 2 O,
to form a glass-ceramic article wherein the glass-ceramic comprises lithium disilicate, apatite, and diopside phases.