Boron phosphate glass-ceramics with low dielectric loss

Patent metadata

Field	Value
Publication number	US-11236012-B2
Application number	US-201917040070-A
Country	US
Kind code	B2
Filing date	Mar 28, 2019
Priority date	Mar 28, 2018
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A glass-ceramic that includes: SiO 2 from about 35 mol % to about 80 mol %; B 2 O 3 from about 10 mol % to about 50 mol %; P 2 O 5 from about 10 mol % to about 50 mol %; and an optional addition of one or more of CaO, MgO and Bi 2 O 3 from 0 mol % to about 5 mol %, wherein the glass-ceramic further comprises a boron-phosphate crystalline phase.

First claim

What is claimed is:

1. A glass-ceramic, comprising:
SiO 2 from about 35 mol % to about 80 mol %;
B 2 O 3 from about 10 mol % to about 50 mol %;
P 2 O 5 from about 23 mol % to about 50 mol %, wherein the ratio of B 2 O 3 to P 2 O 5 ranges from 1:2 to 2:1; and
an optional addition of one or more of CaO, MgO and Bi 2 O 3 from 0 mol % to about 5 mol %,
wherein the glass-ceramic further comprises a boron-phosphate crystalline phase.

2. The glass-ceramic according to claim 1 , wherein the glass-ceramic comprises an average coefficient of thermal expansion (CTE) of about 40×10 −7 /° C. to about 65×10 −7 /° C., as measured from 25° C. to 300° C.

3. The glass-ceramic according to claim 1 , further comprising:
Al 2 O 3 from about 0.005 mol % to about 1 mol %.

4. The glass-ceramic according to claim 1 , further comprising:
SnO 2 from about 0.005 mol % to about 0.5 mol %.

5. The glass-ceramic according to claim 1 , further comprising:
SiO 2 from about 55 mol % to about 62 mol %;
B 2 O 3 from about 10 mol % to about 30 mol %; and
P 2 O 5 from about 23 mol % to about 35 mol %.

6. The glass-ceramic according to claim 1 , the boron-phosphate crystalline phase being derived from ceramming of the glass-ceramic between about 750° C. and about 1150° C. for about 1 to about 10 hours.

7. A glass-ceramic, comprising:
SiO 2 from about 35 mol % to about 80 mol %;
B 2 O 3 from about 10 mol % to about 50 mol %;
P 2 O 5 from about 10 mol % to about 50 mol %, wherein the ratio of B 2 O 3 to P 2 O 5 ranges from 1:2 to 2:1; and
an optional addition of one or more of CaO, MgO and Bi 2 O 3 from 0 mol % to about 5 mol %,
wherein the glass-ceramic further comprises a loss tangent of 0.006 or less for signals having a frequency of 1 GHz.

8. The glass-ceramic according to claim 7 , wherein the glass-ceramic comprises an average coefficient of thermal expansion (CTE) of about 40×10 −7 /° C. to about 65×10 −7 /° C., as measured from 25° C. to 300° C.

9. The glass-ceramic according to claim 7 , wherein the glass-ceramic further comprises a loss tangent of 0.003 or less for signals having a frequency of 1 GHz.

10. The glass-ceramic according to claim 7 , further comprising:
Al 2 O 3 from about 0.005 mol % to about 1 mol %.

11. The glass-ceramic according to claim 7 , further comprising:
SnO 2 from about 0.005 mol % to about 0.5 mol %.

12. The glass-ceramic according to claim 7 , further comprising:
SiO 2 from about 55 mol % to about 75 mol %;
B 2 O 3 from about 10 mol % to about 30 mol %; and
P 2 O 5 from about 10 mol % to about 35 mol %.

13. A glass-ceramic, comprising:
SiO 2 from about 35 mol % to about 80 mol %;
B 2 O 3 from about 10 mol % to about 50 mol %;
P 2 O 5 from about 10 mol % to about 50 mol %, wherein the ratio of B 2 O 3 to P 2 O 5 ranges from 1:2 to 2:1; and
one or more of CaO, MgO and Bi 2 O 3 from greater than 0 mol % to about 5 mol %,
wherein the glass-ceramic further comprises a loss tangent of 0.006 or less for signals having a frequency of 1 GHz.

14. The glass-ceramic according to claim 13 , wherein the glass-ceramic comprises an average coefficient of thermal expansion (CTE) of about 40×10 −7 /° C. to about 65×10 −7 /° C., as measured from 25° C. to 300° C.

15. The glass-ceramic according to claim 13 , wherein the glass-ceramic further comprises a loss tangent of 0.003 or less for signals having a frequency of 1 GHz.

16. The glass-ceramic according to claim 13 , further comprising:
Al 2 O 3 from about 0.005 mol % to about 1 mol %.

17. The glass-ceramic according to claim 13 , further comprising:
SnO 2 from about 0.005 mol % to about 0.5 mol %.

18. The glass-ceramic according to claim 13 , further comprising:
SiO 2 from about 55 mol % to about 75 mol %;
B 2 O 3 from about 10 mol % to about 30 mol %; and
P 2 O 5 from about 10 mol % to about 35 mol %.

19. The glass-ceramic according to claim 13 , wherein the glass-ceramic further comprises a boron-phosphate crystalline phase.

20. The glass-ceramic according to claim 19 , the boron-phosphate crystalline phase being derived from ceramming of the glass-ceramic between about 750° C. and about 1150° C. for about 1 to about 10 hours.

21. A laminate article comprising:
a core glass layer; and
a plurality of clad layers laminated to the core glass layer and comprising the glass-ceramic according to claim 1 .

22. The glass-ceramic according to claim 1 , wherein the ratio of B 2 O 3 to P 2 O 5 ranges from 1:1.5 to 1.5:1.

23. The glass-ceramic according to claim 7 , further comprising:
SiO 2 from about 55 mol % to about 62 mol %; and
P 2 O 5 from about 23 mol % to about 35 mol %.

24. The glass-ceramic according to claim 13 , further comprising:
SiO 2 from about 55 mol % to about 62 mol %; and
P 2 O 5 from about 23 mol % to about 35 mol %.

Assignees

• Corning Inc

Inventors

• Beall George Halsey
• Boek Heather Debra
• Cai Ling
• Kim Jin Su
• Thelen Dean Michael
• Weller Mark Owen

Classifications

• C03B32/02 Primary

  Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles {(C03B27/012 takes precedence)} · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• B32B2457/00

  Electrical equipment · CPC title

• C03C10/0054 Primary

  containing PbO, SnO2, B2O3 · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title