Patent US5369068A successfully refreshed from Google Patents.
US5369068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bismuth lamellar compound
Assignee: Toyota Motor Corp
•
Filing: 1993-07-28
•
Granted: 1994-11-29
•
Expires: 2013-07-28
Abstract
Abstract Disclosed is a bismuth layer compound expressed by a chemical formula, (M1 1-2x M2 x Bi 4+x )Ti 4 O 15 , wherein "M1" is alkaline earth metal including Sr at least, "M2" is alkali metal, and "x" falls in a range, 0.06≦x≦0.44. "M1" can be replaced by Pb or combinations of Pb and alkaline earth metal. The bismuth layer compound exhibits a less fluctuating sensitivity with respect to temperature variations. The bismuth layer compound can further include Mn in a form of MnO in an amount of from 0.02 to 0.25% by weight, and thereby it exhibits not only an upgraded sensitivity but also it does not exhibits a hysteresis in a force-electric charge output diagram.
Inventors
- 👤 Kazuhide Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/475; C01; C01G; C01G29/00; C01G29/006
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
46 words
A bismuth layer compound expressed by the chemical formula: (M1 1-2x M2 x Bi 4+x )Ti 4 O 15 , wherein "M1" is Sr or Sr and at least one other alkaline earth metal; "M2" is an alkali metal: and "x" falls in a range, 0.06≦x≦0.44.
Claim 2
Dependent Claim
46 words
A bismuth layer compound expressed by the chemical formula: (M1 1-2x M2 x Bi 4+x )Ti 4 O 15 , wherein "M1" is Sr or Sr and at least one other alkaline earth metal; "M2" is an alkali metal: and "x" falls in a range, 0.06≦x≦0.44.
Claim 3
Dependent Claim
31 words
The bismuth layer compound according to claim 1, wherein said bismuth layer compound further includes Mn in the form of MnO in an amount of from 0.02 to 0.25% by weight.
Claim 4
Dependent Claim
25 words
The bismuth layer compound according to claim 2, wherein said bismuth layer compound includes MnO in an amount of from 0.05 to 0.10% by weight.
Claim 5
Dependent Claim
39 words
The bismuth compound according to claim 2, wherein said bismuth layer compound does not exhibit a hysteresis in an electric charge output-force diagram when it is subjected to a force falling in a range of from 0 to 2,000N.
Claim 6
Dependent Claim
15 words
The bismuth layer compound according to claim 1, wherein "x" falls in a range, 0.10≦x≦0.40.
Claim 7
Dependent Claim
49 words
A bismuth layer compound expressed by the chemical formula: {(M3 1-y Pb y ) 1-2x M2 x Bi 4+x )}Ti 4 O 15 , wherein "M3" is an alkaline earth metal; "M2" is an alkaline metal; "x" falls in a range, 0.06≦x≦0.44; and "y" falls in a range, 0<y<1.0.
Claim 8
Dependent Claim
49 words
A bismuth layer compound expressed by the chemical formula: {(M3 1-y Pb y ) 1-2x M2 x Bi 4+x )}Ti 4 O 15 , wherein "M3" is an alkaline earth metal; "M2" is an alkaline metal; "x" falls in a range, 0.06≦x≦0.44; and "y" falls in a range, 0<y<1.0.
Claim 9
Dependent Claim
31 words
The bismuth layer compound according to claim 6, wherein said bismuth layer compound further includes Mn in the form of MnO in an amount of from 0.02 to 0.25% by weight.
Claim 10
Dependent Claim
31 words
The bismuth layer compound according to claim 7, wherein said bismuth layer compound includes Mn in the form of to MnO in an amount of from 0.05 to 0.10% by weight.
Claim 11
Dependent Claim
40 words
The bismuth layer compound according to claim 7, wherein said bismuth layer compound does not exhibit a hysteresis in an electric charge output-force diagram when it is subjected to a force falling in a range of from 0 to 2,000N.
Claim 12
Dependent Claim
15 words
The bismuth layer compound according to claim 6, wherein "x" falls in a range, 0.10≦x≦0.40.
Claim 13
Dependent Claim
60 words
The bismuth layer compound according to claim 6 or 7, wherein "x" falls in a range of from 0.2 to 0.3, and said bismuth layer compound exhibits a sensitivity in its piezoelectric property which does not fluctuate with temperature variations in a temperature range of from 70° to 130° C. and whose maximum temperature variation rate of sensitivity is 5%.
Claim 14
Dependent Claim
92 words
A bismuth layer compound expressed by the chemical formula: (M1 1-2x M2 x Bi 4+x )Ti 4 O 15 wherein "M1" is Sr or Sr and at least one other alkaline earth metal; "M2" is an alkali metal: and "x" falls in a range, 0.06≦x≦0.44, wherein said bismuth layer compound further includes at least one element selected from the group consisting of Ni and Cr in an amount from 0.5 to 0.1% by weight, or MnO in an amount of from 0.02 to 0.25% by weight and said at least one element.
Claim 15
Dependent Claim
92 words
A bismuth layer compound expressed by the chemical formula: (M1 1-2x M2 x Bi 4+x )Ti 4 O 15 wherein "M1" is Sr or Sr and at least one other alkaline earth metal; "M2" is an alkali metal: and "x" falls in a range, 0.06≦x≦0.44, wherein said bismuth layer compound further includes at least one element selected from the group consisting of Ni and Cr in an amount from 0.5 to 0.1% by weight, or MnO in an amount of from 0.02 to 0.25% by weight and said at least one element.
Claim 16
Dependent Claim
96 words
A bismuth layer compound expressed by the chemical formula: {(M3 1-y Pb y ) 1-2x M2 x Bi 4+x )}Ti 4 0 15 , wherein "M3" is an alkaline earth metal; "M2" is an alkali metal; "x" falls in a range, 0.06≦x≦0.44; and "y" falls in a range, 0<y<1.0; wherein said bismuth layer compound further includes at least one element selected from the group consisting of Ni and Cr in an amount of from 0.5 to 1.0% by weight, or MnO in an amount of from 0.05 to 0.25% weight and said at least one element.
Claim 17
Dependent Claim
96 words
A bismuth layer compound expressed by the chemical formula: {(M3 1-y Pb y ) 1-2x M2 x Bi 4+x )}Ti 4 0 15 , wherein "M3" is an alkaline earth metal; "M2" is an alkali metal; "x" falls in a range, 0.06≦x≦0.44; and "y" falls in a range, 0<y<1.0; wherein said bismuth layer compound further includes at least one element selected from the group consisting of Ni and Cr in an amount of from 0.5 to 1.0% by weight, or MnO in an amount of from 0.05 to 0.25% weight and said at least one element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |