US4220546A
Expired / Lapsed
US
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Piezoelectric ceramic compounds
Assignee: Toko Inc
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Filing: 1979-07-16
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Granted: 1980-09-02
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Expires: 1999-07-16
Abstract
Abstract Piezoelectric ceramics are provided consisting of a ternary system composition of PbTiO3-PbZrO3-La(Mn1-4 alpha Ni3 alpha W alpha )O3 where alpha is in the range of 3/40</= alpha </=1/4.
Inventors
- 👤 Hiroshi Satomura
- 👤 Katsuyoshi Takano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:42
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49; C04B35/491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A ternary system piezoelectric ceramic compound represented by a molecular formula xLa(Mn.sub.1-4α Ni.sub.3α W.sub.α)O.sub.3 - yPbTiO.sub.3 - zPbZrO.sub.3 having a composition within the area defined by the points A, B, C, D, E, F and G in the ternary diagram of FIG. 1 the coordinates of said points being: ______________________________________
A (x=0.005, y=0.565, z=0.43)
B (x=0.005, y=0.295, z=0.70)
C (x=0.05, y=0.25, z=0.70)
D (x=0.10, y=0.30, z=0.60)
E (x=0.10, y=0.45, z=0.45)
F (x=0.08, y=0.51, z=0.41)
G (x=0.05, y=0.55, z=0.40)
______________________________________ where x, y and z represent molar fractions of constituents of said piezoelectric ceramic compound respectively and x+y+z is equal to unity, the molar fraction α in (Mn 1-4 α Ni 3 α W.sub.α) of the x-constituent of said piezoelectric ceramic compound being within the range 3/40≦α≦1/4.
Claim 2
Dependent Claim
126 words
A ternary system piezoelectric ceramic compound represented by a molecular formula xLa(Mn.sub.1-4α Ni.sub.3α W.sub.α)O.sub.3 - yPbTiO.sub.3 - zPbZrO.sub.3 having a composition within the area defined by the points A, B, C, D, E, F and G in the ternary diagram of FIG. 1 the coordinates of said points being: ______________________________________
A (x=0.005, y=0.565, z=0.43)
B (x=0.005, y=0.295, z=0.70)
C (x=0.05, y=0.25, z=0.70)
D (x=0.10, y=0.30, z=0.60)
E (x=0.10, y=0.45, z=0.45)
F (x=0.08, y=0.51, z=0.41)
G (x=0.05, y=0.55, z=0.40)
______________________________________ where x, y and z represent molar fractions of constituents of said piezoelectric ceramic compound respectively and x+y+z is equal to unity, the molar fraction α in (Mn 1-4 α Ni 3 α W.sub.α) of the x-constituent of said piezoelectric ceramic compound being within the range 3/40≦α≦1/4.
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) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |