Electromechanical actuators

Details Electromechanical actuators Electromechanical actuators

2006-08-15

2006-08-15

Koslow, C. Melissa (Department: 1755)

Compositions

Piezoelectric

C252S06290R, C501S134000, C501S135000, C501S136000, C501S137000, C501S139000, C117S949000, C117S944000, C117S950000, C117S948000

Reexamination Certificate

active

07090785

ABSTRACT:
A perovskite compound of the formula, (Na1/2Bi1/2)1-xMx(Ti1-yM′y)O3±z, where M is one or more of Ca, Sr, Ba, Pb, Y, La, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb and Lu; and M′ is one or more of Zr, Hf, Sn, Ge, Mg, Zn, Al, Sc, Ga, Nb, Mo, Sb, Ta, W, Cr, Mn, Fe, Co and Ni, and 0.01<x<0.3, and 0.01<y<0.3, and z<0.1 functions as an electromechanically active material. The material may possess electrostrictive or piezoelectric characteristics.

REFERENCES:
patent: 3994823 (1976-11-01), Ainger et al.
patent: 4542083 (1985-09-01), Cava et al.
patent: 4668595 (1987-05-01), Yoshino et al.
patent: 5423995 (1995-06-01), Helke et al.
patent: 5500142 (1996-03-01), Ushida et al.
patent: 5527480 (1996-06-01), Bailey et al.
patent: 5558961 (1996-09-01), Doeff et al.
patent: 5637542 (1997-06-01), Takenaka
patent: 5648012 (1997-07-01), Higashibeppu et al.
patent: 5796207 (1998-08-01), Safari et al.
patent: 6004474 (1999-12-01), Takenaka et al.
patent: 6080327 (2000-06-01), Takenaka et al.
patent: 6231779 (2001-05-01), Chiang et al.
patent: 6426018 (2002-07-01), Takahashi et al.
patent: 6599662 (2003-07-01), Chiang et al.
patent: 2002/0036282 (2002-03-01), Chiang et al.
patent: 2002/0048706 (2002-04-01), Mayes et al.
patent: 2003/0082446 (2003-05-01), Chiang et al.
patent: 2003/0099884 (2003-05-01), Chiang et al.
patent: 2004/0005265 (2004-01-01), Chiang et al.
patent: 2001-048641 (2001-02-01), None
patent: WO 98/16960 (1998-04-01), None
patent: WO 99/56331 (1999-11-01), None
patent: WO 00/41256 (2000-07-01), None
patent: WO 01/77501 (2001-10-01), None
patent: WO 02/43168 (2002-05-01), None
patent: WO 03/012908 (2003-02-01), None
patent: WO 03/056646 (2003-07-01), None
Kuwata, J. et al., “Dielectric and Piezoelectric Properties of 0.91Pb(Zn⅓Nb⅔)O3-0.09PbTiO3Single Crystals,”Japanese Journal of Applied Physics, Sep. 1982, 21(9):1298-1302.
Roleder, K. et al., “Time Dependence of Electric Permittivity in Na0.5Bi0.5TiO3Single Crystals,”Ferroelectrics, 1989, 89:1-5. no month.
Sakata, “Ferroelectric and Antiferroelectric Properties of (Na0.5Bi0.5) TiO.3-SrTiO.3Solid Solution Ceramics,”Ferroelectrics, 1974, 7:347-349. no month.
Smolenskii, G.A. et al., “New Ferroelectrics of Complex Composition.IV,”Sov. Phys.-Solid State, May 1961, 2(11):2651-2654.
Takenaka, T. et al, Acoustic Wave Characteristics of Lead-Free (Bi½Na½)0.99Ca0.01TiO3Piezoelectric Ceramic,J. Appl. Phys. Suppl., 1992, 28:59-62, No month.
Takenaka et al, Bi½Na½) TiO3System for Lead-Free Piezoelectric Ceramics,Japanese Journal of Applied Physics, Sep. 1991, 30(9B):2236-2239.
Takenaka, T. et al, “Piezoelectric Ceramics of (Bi½Na½)TiO3-PbTiO3-BaTiO3System,”Elect. Eng. Japan, 1992, 112(7):92-100.
Bergman et al., “Phase Diagram for K2O-Na2O-B2O3-P2O5,” Reported inRuss. J. Inorg. Chem. 14(7):1036-1038 (1969) [abstract only].
Manier et al., Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3(NBT-KBT) System: A Structural and Electrical Study:Phys. Stat. Sol. 157:499-506 (1996).
Park and Shrout, “Ultrahigh Strain and Piezoelectric Behavior in Relaxor Based Ferroelectric Single Crystals”J. Appl. Phys. 82:1804-1811 (1997).
Park and Chung, “Nonstoichiometry and the Long-Range Cation Ordering in Crystals of (Na½Bi½) TiO3”J. Am. Ceram. Soc. 77(10):2641-47 (1994).
Pronin et al., “Peculiarities of Phase Transitions in Sodium-Bismuth Titanate”Ferroelectrics25:395-397 (1980).
Roleder et al., “Time Dependence of Electric Permittivity in Na0.5Bi0.5TiO3Single Crystals”Ferroelectrics89:1-5 (1989).
Service, “Shape-Changing Crystals Get Shiftier”Science275:1877-1878 (1997).
Takenaka et al., “Mechanical Properties of (Bi½Na½)TiO3-based Piezoelectric Ceramics”Silicates Industrieles7-8:136-142 (1993).
Vakhrushev et al., “Investigation of a Broad Phase Transition in Na0.5Bi0.5TiO3By the Neutron Scattering Method”Sov. Phys. Solid State27(3):455-457 (1985).
Wang et al., “Phase Diagram of K0.5Bi0.5TiO3-Na0.5Bi0.5TiO3”Guisuanyan Xuebao15(3):248-255 (1987) [abstract only].
R. D. Shannon, “Revised Effective Ionic Radii And Systematic Studies Of Interatomic Distances In Halides And Chalcogenides,” Acta Cryst. (1976), A32, pp. 751-767.
R. D. Shannon, “Dielectric Polarizabilities Of Ions In Oxides And Fluorides,” J. Appl. Phys., vol. 73, No. 1, pp. 348-366, Jan. 1, 1993.
Osamu Fukunaga et al., “The Relation Between Ionic Radii And Cell Volumes In The Perovskite Compounds,” Journal of Solid State Chemistry, vol. 8, pp. 331-338 (1973).
Sossity Sheets, “Dielectric and Electromechanical Properties of Barium and Zirconium Co-Doped Sodium Bismuth Titanate,” Master of Science Thesis, Department of Materials Science and Engineering, Massachusetts Institute of Technology, 2004.

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