1. A batch-melted borosilicate glass essentially free of metallic silver (Ag0), made by melting a batch comprising, in cation percent, 15-60 SiO2 10-30 Al2O3, 10-45 B2O3, and 8-25 Ag2O.
2. The batch-melted glass according to claim 1 wherein the concentration of monovalent ions other than silver does not exceed 2 cation percent.
3. The batch-melted glass according to claim 1, comprising high field strength ions.
4. The batch-melted, glass according to claim 3, wherein the high field strength ions are selected from the group consisting of aluminum, zirconium and tantalum.
5. The batch-melted, glass according to claim 4, wherein the high field strength ions comprise aluminum.
6. The batch-melted glass according to claim 3, characterized in that the ratio of high field strength ions to monovalent ions is at least 1.
7. The borosilicate glass of claim 1, further characterized by being essentially colorless.
8. The borosilicate glass according to claim 1, wherein the cation concentration of Ag is between 12.5 cation percent and 25 cation percent.
9. The borosilicate glass according to claim 8 wherein the cation concentration of Ag is less than or equal to the concentration of Al.
10. The borosilicate glass according to claim 1, wherein the SiO2 concentration is between 20 cation percent and 45 cation percent.
11. The borosilicate glass according to claim 1, wherein the concentration of B2O3 is between 15 cation percent and 30 cation percent.
12. The borosilicate glass according to claim 1, wherein the cation concentration of Ag is in the range of 12.5 to 25 cation %, the cation concentration of Al is equal to the cation concentration of Ag, and the concentration of SiO2 is in the range of 20 to 40 cation %.
13. The borosilicate glass according to claim 1, characterized in that the Ag ions can be replaced by less polarizable monovalent ions by the process of ion exchange.
14. A batch-melted borosilicate glass comprising aluminum, zirconium andor tantalum but essentially free of metallic silver (Ag0), made by melting a batch containing at least 2 cation percent silver.
15. The batch-melted, glass according to claim 11, characterized in that the ratio of aluminum to zirconium is at least 3:1.
16. The melt-formed glass according to claim 14, characterized in that the ratio of tantalum to aluminum does not exceed 1:2.
17. A lens comprising a batch-melted borosilicate glass essentially free of metallic silver (Ag0), made by melting a batch containing at least 2 cation percent silver.
18. The lens of claim 17, wherein the borosilicate glass comprises, in cation percent, 15-60 SiO2, 10-30 Al2O3, 10-45 B2O3, and 8-25 Ag2O.
19. The lens of claim 17, wherein the borosilicate glass is further characterized by being essentially colorless.
20. The lens of claim 17, wherein the borosilicate glass comprises between 12.5 cation percent and 25 cation percent of silver.
21. The lens of claim 18, wherein in the borosilicate glass, the cation concentration of Ag is less than or equal to the concentration of Al.
22. The lens of claim 18, wherein the borosilicate glass comprises SiO2 between 20 cation percent and 45 cation percent.
23. The lens of claim 18, wherein the concentration of B2O3 in the borosilicate glass is between 15 cation percent and 30 cation percent.
24. The lens of claim 18, wherein the borosilicate glass the cation concentration of Ag is in the range of 12.5 to 25 cation %, the cation concentration of Al is equal to the cation concentration of Ag, and the concentration of SiO2 is in the range of 20 to 40 cation %.
25. The lens of claim 17, wherein the borosilicate glass further comprises aluminum, zirconium andor tantalum.
26. The lens of claim 25, wherein in the borosilicate glass the ratio of aluminum to zirconium is at least 3:1.
27. The lens of claim 25, wherein in the borosilicate glass the ratio of tantalum to aluminum does not exceed 1:2.
28. A gradient index lens formed by subjecting a batch-melted borosilicate glass essentially free of metallic silver (Ag0) to an ion-exchange process, said glass being made by melting a batch containing at least 2 carbon percent silver.
29. The lens of claim 28, wherein the borosilicate glass comprises, in cation percent, 15-60 SiO2, 10-30 Al2O3, 10-45 B2O3, and 8-25 Ag2O.
30. The lens of claim 28, wherein the borosilicate glass is further characterized by being essentially colorless.
31. The lens of claim 28, wherein the borosilicate glass comprises between 12.5 cation percent and 25 cation percent of silver.
32. The lens of claim 29 wherein in the borosilicate glass, the cation concentration of Ag is less than or equal to the concentration of Al.
33. The lens of claim 29, wherein borosilicate glass comprises SiO2 between 20 cation percent and 45 cation percent.
34. The lens of claim 29, wherein the borosilicate glass the concentration of B2O3 is between 15 cation percent and 30 cation percent.
35. The lens of claim 29, wherein in the borosilicate glass the cation concentration of Ag is in the range of 12.5 to 25 cation %, the cation concentration of Al is equal to the cation concentration of Ag, and the concentration of SiO2 is in the range of 20 to 40 cation %.
36. The lens of claim 28, wherein the borosilicate glass further comprises aluminum, zirconium andor tantalum.
37. The lens of claim 36, wherein in the borosilicate glass the ratio of aluminum to zirconium is at least 3:1.
38. The lens of claim 36, wherein in the borosilicate glass the ratio of tantalum to aluminum does not exceed 1:2.
39. A batch-melted borosilicate glass produced by melting a batch containing a high concentration of silver of at least 2 cation percent, said glass being essentially free of metallic silver (Ag0), and part of the Ag ions (Ag+) has been replaced by less polarizable monovalent ions by the process of ion exchange.
40. The borosilicate glass according to claim 39, wherein the batch comprises, in cation percent, 15-60 SiO2, 10-30 Al2O3, 10-45 B2O3, and 8-25 Ag2O.
41. The borosilicate glass of claim 39, further characterized by being essentially colorless and transparent.
42. The borosilicate glass according to claim 39, wherein the glass comprises Ag between 12.5 cation percent and 25 cation percent.
43. The borosilicate glass according to claim 42 further comprising aluminum and having a cation concentration of Ag less than or equal to the concentration of Al.
44. The borosilicate glass according to claim 39, wherein the glass comprises SiO2 between 20 cation percent and 45 cation percent.
45. The borosilicate glass according to claim 39, wherein the glass comprises B2O3 between 15 cation percent and 30 cation percent.
46. The borosilicate glass according to claim 39, wherein the glass comprises Ag ion concentration in the range of 12.5 to 25 cation %, an Al cation concentration equal to the cation concentration of Ag, and a SiO2 concentration in the range of 20 to 40 cation %.
47. The borosilicate glass according to claim 39 further comprising aluminum, zirconium andor tantalum.
48. The glass of claim 47, wherein the ratio of aluminum to zirconium is at least 3:1.
49. The glass of claim 47, wherein the ratio of tantalum to aluminum does not exceed 1:2.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A liquid droplet ejection head comprising:
a piezoelectric actuator using a piezoelectric ceramic composition represented by the following formula:
(1\u2212y\u2212z\u2212w)(KxNa1-x)NbO3+yLiNbO3+zSrTiO3+wBiFeO3,
provided that 0.4<x<0.6, 0<y\u22660.1, 0<z<0.1, 0<w<0.09, and 0.03<y+z+w\u22660.12,
wherein (KxNa1-x)NbO3 represents potassium sodium niobate, LiNbO3 represents lithium niobate, SrTiO3 represents strontium titanate and BiFeO3 represents bismuth iron oxide, and
the piezoelectric ceramic composition has a piezoelectric d33 constant of 120 (pCN) or more.
2. The liquid droplet ejection head of claim 1,
wherein the piezoelectric actuator is a shear mode piezoelectric actuator utilizing a piezoelectric d15 constant.
3. The liquid droplet ejection head of claim 1,
wherein the piezoelectric actuator is a deflection piezoelectric actuator utilizing a piezoelectric d31 constant.
4. The liquid droplet ejection head of claim 1,
wherein the piezoelectric actuator is a push piezoelectric actuator utilizing a piezoelectric d31 constant.
5. The liquid droplet election head of claim 1,
wherein the piezoelectric actuator is a push piezoelectric actuator utilizing a piezoelectric d33 constant.