This page lists properties of several commonly used piezoelectric materials.
Piezoelectric materials (PMs) can be broadly classified as either crystalline, ceramic, or polymeric. [1] The most commonly produced piezoelectric ceramics are lead zirconate titanate (PZT), barium titanate, and lead titanate. Gallium nitride and zinc oxide can also be regarded as a ceramic due to their relatively wide band gaps. Semiconducting PMs offer features such as compatibility with integrated circuits and semiconductor devices. Inorganic ceramic PMs offer advantages over single crystals, including ease of fabrication into a variety of shapes and sizes not constrained crystallographic directions. Organic polymer PMs, such as PVDF, have low Young's modulus compared to inorganic PMs. Piezoelectric polymers (PVDF, 240 mV-m/N) possess higher piezoelectric stress constants (g33), an important parameter in sensors, than ceramics (PZT, 11 mV-m/N), which show that they can be better sensors than ceramics. Moreover, piezoelectric polymeric sensors and actuators, due to their processing flexibility, can be readily manufactured into large areas, and cut into a variety of shapes. In addition polymers also exhibit high strength, high impact resistance, low dielectric constant, low elastic stiffness, and low density, thereby a high voltage sensitivity which is a desirable characteristic along with low acoustic and mechanical impedance useful for medical and underwater applications.
Among PMs, PZT ceramics are popular as they have a high sensitivity, a high g33 value. They are however brittle. Furthermore, they show low Curie temperature, leading to constraints in terms of applications in harsh environmental conditions. However, promising is the integration of ceramic disks into industrial appliances moulded from plastic. This resulted in the development of PZT-polymer composites, and the feasible integration of functional PM composites on large scale, by simple thermal welding or by conforming processes. Several approaches towards lead-free ceramic PM have been reported, such as piezoelectric single crystals (langasite), and ferroelectric ceramics with a perovskite structure and bismuth layer-structured ferroelectrics (BLSF), which have been extensively researched. Also, several ferroelectrics with perovskite-structure (BaTiO3 [BT], (Bi1/2Na1/2) TiO3 [BNT], (Bi1/2K1/2) TiO3 [BKT], KNbO3 [KN], (K, Na) NbO3 [KNN]) have been investigated for their piezoelectric properties.
The following table lists the following properties for piezoelectric materials
Single crystals | ||||||
---|---|---|---|---|---|---|
Reference | Material & heterostructure used for the characterization (electrodes/material, electrode/substrate) | Orientation | Piezoelectric coefficients, d (pC/N) | Relative permittivity, εr | Electromechanical coupling factor, k | Quality factor |
Hutson 1963 [2] | AlN | d15 = -4.07per | ε33 = 11.4 | |||
d31 = -2 | ||||||
d33 = 5 | ||||||
Cook et al. 1963 [3] | BaTiO3 | d15 = 392 | ε11 = 2920 | k15 = 0.57 | ||
d31 = -34.5 | ε33 = 168 | k31 = 0.315 | ||||
d33 = 85.6 | k33 = 0.56 | |||||
Warner et al. 1967 [4] | LiNbO3 (Au-Au) | <001> | d15 = 68 | ε11 = 84 | ||
d22 = 21 | ε33 = 30 | |||||
d31 = -1 | k31 = 0.02 | |||||
d33 = 6 | kt = 0.17 | |||||
Smith et al. 1971 [5] | LiNbO3 | <001> | d15 = 69.2 | ε11 = 85.2 | ||
d22 = 20.8 | ε33 = 28.2 | |||||
d31 = -0.85 | ||||||
d33 = 6 | ||||||
Yamada et al. 1967 [6] | LiNbO3 (Au-Au) | <001> | d15 = 74 | ε11 = 84.6 | ||
d22 = 21 | ε33 = 28.6 | k22 = 0.32 | ||||
d31 = -0.87 | k31 = 0.023 | |||||
d33 = 16 | k33 = 0.47 | |||||
Yamada et al. 1969 [7] | LiTaO3 | d15 = 26 | ε11 = 53 | |||
d22 = 8.5 | ε33 = 44 | |||||
d31 = -3 | ||||||
d33 = 9.2 | ||||||
Cao et al. 2002 [8] | PMN-PT (33%) | d15 = 146 | ε11 = 1660 | k15 = 0.32 | ||
d31 = -1330 | ε33 = 8200 | k31 = 0.59 | ||||
d33 = 2820 | k33 = 0.94 | |||||
kt = 0.64 | ||||||
Badel et al. 2006 [9] | PMN-25PT | <110> | d31 = -643 | ε33 = 2560 | k31 = -0.73 | 362 |
Kobiakov 1980 [10] | ZnO | d15 = -8.3 | ε11 = 8.67 | k15 = 0.199 | ||
d31 = -5.12 | ε33 = 11.26 | k31 = 0.181 | ||||
d33 = 12.3 | k33 = 0.466 | |||||
Zgonik et al. 1994 [11] | ZnO (pure with lithium dopant) | d15 = -13.3 | kr = 8.2 | |||
d31 = -4.67 | ||||||
d33 = 12.0 | ||||||
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [001] (single domain) | d33 = 90 | |||
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] (single domain) | d33 = 224 | |||
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] neutral (domain size of 100 ľm) | d33 = 235 | ε33 = 1984 | k33 = 54.4 | |
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] neutral (domain size of 60 ľm) | d33 = 241 | ε33 = 1959 | k33 = 55.9 | |
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] (domain size of 22 ľm) | d33 = 256 | ε33 = 2008 | k33 = 64.7 | |
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] neutral (domain size of 15 ľm) | d33 = 274 | ε33 = 2853 | k33 = 66.1 | |
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] neutral (domain size of 14 ľm) | d33 = 289 | ε33 = 1962 | k33 = 66.7 | |
Zgonik et al. 1994 [12] | BaTiO3 single crystals | [111] neutral | d33 = 331 | ε33 = 2679 | k33 = 65.2 | |
[13] | LN crystal | d31 = -4.5 d33 = -0.27 | ||||
Li et al. 2010 [14] | PMNT31 | d33 = 2000 | ε33 = 5100 | k31 = 80 | ||
d31 = -750 | ||||||
Zhang et al. 2002 [15] | PMNT31-A | 1400 | ε33 = 3600 | |||
Zhang et al. 2002 [15] | PMNT31-B | 1500 | ε33 = 4800 | |||
Zhang et al. 2002 [15] | PZNT4.5 | d33 = 2100 | ε33 = 4400 | k31 = 83 | ||
d31 = -900 | ||||||
Zhang et al. 2004 [16] | PZNT8 | d33 = 2500 | ε33 = 6000 | k31 = 89 | ||
d31 = -1300 | ||||||
Zhang et al. 2004 [16] | PZNT12 | d33 = 576 | ε33 = 870 | k31 = 52 | ||
d31 = -217 | ||||||
Yamashita et al. 1997 [17] | PSNT33 | ε33 = 960 | / | |||
Yasuda et al. 2001 [18] | PINT28 | 700 | ε33 = 1500 | / | ||
Guo et al. 2003 [19] | PINT34 | 2000 | ε33 = 5000 | / | ||
Hosono et al. 2003 [20] | PIMNT | 1950 | ε33 = 3630 | / | ||
Zhang et al. 2002 [15] | PYNT40 | d33 = 1200 | ε33 = 2700 | k31 = 76 | ||
d31 = -500 | ||||||
Zhang et al. 2012 [21] | PYNT45 | d33 = 2000 | ε33 = 2000 | k31 = 78 | ||
Zhang et al. 2003 [22] | BSPT57 | d33 = 1200 | ε33 = 3000 | k31 = 77 | ||
d31 = -560 | ||||||
Zhang et al. 2003 [23] | BSPT58 | d33 = 1400 | ε33 = 3200 | k31 = 80 | ||
d31 = -670 | ||||||
Zhang et al. 2004 [16] | BSPT66 | d33 = 440 | ε33 = 820 | k31 = 52 | ||
d31 = -162 | ||||||
Ye et al. 2008 [24] | BSPT57 | d33 = 1150 d31 = -520 | ε33 = 3000 | k31 = 0.52 k33 = 0.91 | ||
Ye et al. 2008 [24] | BSPT66 | d33 = 440 | ε33 = 820 | k31 = 0.52 k33 = 0.88 | ||
d31 = -162 | ||||||
Ye et al. 2008 [24] | PZNT4.5 | d33 = 2000 d31 = -970 | ε33 = 5200 | k31 = 0.50 k33 = 0.91 | ||
Ye et al. 2008 [24] | PZNT8 | d31 = -1455 | ε33 = 7700 | k31 = 0.60 k33 = 0.94 | ||
Ye et al. 2008 [24] | PZNT12 | d33 = 576 d31 = -217 | ε33 = 870 | k31 = 0.52 k33 = 0.86 | ||
Ye et al. 2008 [24] | PMNT33 | d33 = 2820 d31 = -1330 | ε33 = 8200 | k31 = 0.59 k33 = 0.94 | ||
Matsubara et al. 2004 [25] | KCN-modified KNN | d33 = 100 d31 = -180 | ε33 = 220-330 | kp = 33-39 | 1200 | |
Ryu et al. 2007 [26] | KZT modifiedKNN | d33 = 126 | ε33 = 590 | kp = 42 | 58 | |
Matsubara et al. 2005 [27] | KCT modified KNN | d33 = 190 | ε33 = | kp = 42 | 1300 | |
Wang et al. 2007 [28] | Bi2O3 doped KNN | d33 = 127 | ε33 = 1309 | kp = 28.3 | ||
Jiang et al. 2009 [29] | doped KNN-0.005BF | d33 = 257 | ε33 = 361 | kp= 52 | 45 | |
Ceramics | ||||||
---|---|---|---|---|---|---|
Reference | Material & heterostructure used for the characterization (electrodes/material, electrode/substrate) | Orientation | Piezoelectric coefficients, d (pC/N) | Relative permittivity, εr | Electromechanical coupling factor, k | Quality factor |
Berlincourt et al. 1958 [30] | BaTiO3 | d15 = 270 | ε11 = 1440 | k15 = 0.57 | ||
d31 = -79 | ε33 = 1680 | k31 = 0.49 | ||||
d33 = 191 | k33 = 0.47 | |||||
Tang et al. 2011 [31] | BFO | d33 = 37 | kt = 0.6 | |||
Zhang et al. 1999 [32] | PMN-PT | d31 = -74 | ε33 = 1170 | k31 = -0.312 | 283 | |
[33] | PZT-5A | d31 = -171 | ε33 = 1700 | k31 = 0.34 | ||
d33 = 374 | k33 = 0.7 | |||||
[34] | PZT-5H | d15 = 741 | ε11 = 3130 | k15 = 0.68 | 65 | |
d31 = -274 | ε33 = 3400 | k31 = 0.39 | ||||
d33 = 593 | k33 = 0.75 | |||||
[35] | PZT-5K | d33 = 870 | ε33 = 6200 | k33 = 0.75 | ||
Tanaka et al. 2009 [36] | PZN7%PT | d33 = 2400 | εr = 6500 | k33 = 0.94 kt = 0.55 | ||
Pang et al. 2010 [37] | ANSZ | d33 = 295 | 1.61 | 45.5 | 84 | |
Park et al. 2006 [38] | KNN-BZ | d33 = 400 | 2 | 57.4 | 48 | |
Cho et al. 2007 [39] | KNN-BT | d33 = 225 | 1.06 | 36.0 | ||
Park et al. 2007 [40] | KNN-ST | d33 = 220 | 1.45 | 40.0 | 70 | |
Zhao et al. 2007 [41] | KNN-CT | d33 = 241 | 1.32 | 41.0 | ||
Zhang et al. 2006 [42] | LNKN | d33 = 314 | ~700 | 41.2 | ||
Saito et al. 2004 [43] | KNN-LS | d33 = 270 | 1.38 | 50.0 | ||
Saito et al. 2004 [43] | LF4 | d33 = 300 | 1.57 | |||
Tanaka et al. 2009 [36] | Oriented LF4 | d33 = 416 | 1.57 | 61.0 | ||
Pang et al. 2010 [37] | ANSZ | d33 = 295 | 1.61 | 45.5 | 84 | |
Park et al. 2006 [38] | KNN-BZ | d33 = 400 | 2 | 57.4 | 48 | |
Cho et al. 2007 [44] | KNN-BT | d33 = 225 | 1.06 | 36.0 | ||
Park et al. 2007 [40] | KNN-ST | d33 = 220 | 1.45 | 40.0 | 70 | |
Maurya et al. 2013 [45] | KNN-CT | d33 = 241 | 1.32 | 41.0 | ||
Maurya et al. 2013 [45] | NBT-BT | (001) Textured samples | d33 = 322 | ... | ||
Gao et al. 2008 [46] | NBT-BT-KBT | (001) Textured samples | d33 = 192 | |||
Zou et al. 2016 [47] | NBT-KBT | (001) Textured samples | d33 = 134 | kp= 35 | ||
Saito et al. 2004 [43] | NBT-KBT | (001) Textured samples | d33 = 217 | kp = 61 | ||
Chang et al. 2009 [48] | KNLNTS | (001) Textured samples | d33 = 416 | kp = 64 | ||
Chang et al. 2011 [49] | KNNS | (001) Textured samples | d33 = 208 | kp = 63 | ||
Hussain et al. 2013 [50] | KNLN | (001) Textured samples | d33 = 192 | kp = 60 | ||
Takao et al. 2006 [51] | KNNT | (001) Textured samples | d33 = 390 | kp = 54 | ||
Li et al. 2012 [52] | KNN 1 CuO | (001) Textured samples | d33 = 123 | kp = 54 | ||
Cho et al. 2012 [53] | KNN-CuO | (001) Textured samples | d33 = 133 | kp = 46 | ||
Hao et al. 2012 [54] | NKLNT | (001) Textured samples | d33 = 310 | kp = 43 | ||
Gupta et al. 2014 [55] | KNLN | (001) Textured samples | d33 = 254 | |||
Hao et al. 2012 [54] | KNN | (001) Textured samples | d33 = 180 | kp = 44 | ||
Bai et al. 2016 [56] | BCZT | (001) Textured samples | d33 = 470 | kp = 47 | ||
Ye et al. 2013 [57] | BCZT | (001) Textured samples | d33 = 462 | kp = 49 | ||
Schultheiß et al. 2017 [58] | BCZT-T-H | (001) Textured samples | d33 = 580 | |||
OMORI et al. 1990 [59] | BCT | (001) Textured samples | d33 = 170 | |||
Chan et al. 2008 [60] | Pz34 (doped PbTiO3) | d15 = 43.3 | ε33 = 237 | k31 = 4.6 | 700 | |
d31 = -5.1 | ε33 = 208 | k33 = 39.6 | ||||
d33 = 46 | k15 = 22.8 | |||||
kp = 7.4 | ||||||
Lee et al. 2009 [61] | BNKLBT | d33 = 163 | εr = 766 | k31 = 0.188 | 142 | |
ε33 = 444.3 | kt = 0.524 | |||||
kp = 0.328 | ||||||
Sasaki et al. 1999 [62] | KNLNTS | εr = 1156 | k31 = 0.26 | 80 | ||
ε33 = 746 | kt = 0.32 | |||||
kp = 0.43 | ||||||
Takenaka et al. 1991 [63] | (Bi0.5Na0.5)TiO3 (BNT)-based BNKT | d31 = 46 | εr = 650 | kp = 0.27 | ||
d33 = 150 | k31 = 0.165 | |||||
Tanaka et al. 1960 [64] | (Bi0.5Na0.5)TiO3 (BNT)-based BNBT | d31 = 40 | εr = 580 | k31 = 0.19 | ||
d33 = 12.5 | k33 = 0.55 | |||||
Hutson 1960 [65] | CdS | d15 = -14.35 | ||||
d31 = -3.67 | ||||||
d33 = 10.65 | ||||||
Schofield et al. 1957 [66] | CdS | d31 = -1.53 | ||||
d33 = 2.56 | ||||||
Egerton et al. 1959 [67] | BaCaOTi | d31 = -50 | k15 = 0.19 | 400 | ||
d33 = 150 | k31 = 0.49 | |||||
k33 = 0.325 | ||||||
Ikeda et al. 1961 [68] | Nb2O6Pb | d31 = -11 | kr = 0.07 | 11 | ||
d33 = 80 | k31 = 0.045 | |||||
k33 = 0.042 | ||||||
Ikeda et al. 1962 [69] | C6H17N3O10S | d23 = 84 | k21 = 0.18 | |||
d21 = 22.7 | k22 = 0.18 | |||||
d25 = 22 | k23 = 0.44 | |||||
Brown et al. 1962 [70] | BaTiO3 (95%) BaZrO3 (5%) | k15 = 0.15 | 200 | |||
d31 = -60 | k31 = 0.40 | |||||
d33 = 150 | k33 = 0.28 | |||||
Huston 1960 [65] | BaNb2O6 (60%) Nb2O6Pb (40%) | d31 = -25 | kr = 0.16 | |||
Baxter et al. 1960 [71] | BaNb2O6 (50%) Nb2O6Pb (50%) | d31= -36 | kr = 0.16 | |||
Pullin 1962 [72] | BaTiO3 (97%) CaTiO3 (3%) | d31 = -53 | ε33 = 1390 | k15 = 0.39 | ||
d33 = 135 | k31 = 0.17 | |||||
k33 = 0.43 | ||||||
Berlincourt et al. 1960 [73] | BaTiO3 (95%) CaTiO3 (5%) | d15 = -257 | ε33 = 1355 | k15 = 0.495 | 500 | |
d31 = -58 | k31 = 0.19 | |||||
d33 = 150 | k33 = 0.49 | |||||
kr = 0.3 | ||||||
Berlincourt et al. 1960 [73] | BaTiO3 (96%) PbTiO3 (4%) | d31 = -38 | ε33 = 990 | k15 = 0.34 | ||
d33 = 105 | k31 = 0.14 | |||||
k33 = 0.39 | ||||||
Jaffe et al. 1955 [74] | PbHfO3 (50%) PbTiO3 (50%) | d31 = -54 | kr = 0.38 | |||
Kell 1962 [75] | Nb2O6Pb (80%) BaNb2O6 (20%) | d31 = 25 | kr = 0.20 | 15 | ||
Brown et al. 1962 [70] | Nb2O6Pb (70%) BaNb2O6 (30%) | d31 = -40 | ε33 = 900 | k31 = 0.13 | 350 | |
d33 = 100 | k33 = 0.3 | |||||
kr = 0.24 | ||||||
Berlincourt et al. 1960 [76] | PbTiO3 (52%) PbZrO3 (48%) | d15 = 166 | k15 = 0.40 | 1170 | ||
d31 = -43 | k31 = 0.17 | |||||
d33 = 110 | k33 = 0.43 | |||||
kr = 0.28 | ||||||
Berlincourt et al. 1960 [77] | PbTiO3 (50%) lead Zirconate (50%) | d15 = 166 | k15 = 0.504 | 950 | ||
d31 = -43 | k31 = 0.23 | |||||
d33 = 110 | k33 = 0.546 | |||||
kr = 0.397 | ||||||
Egerton et al. 1959 [67] | KNbO3 (50%) NaNbO3 (50%) | d31 = -32 | 140 | |||
d33 = 80 | k31 = 0.21 | |||||
k33 = 0.51 | ||||||
Brown et al. 1962 [70] | NaNbO3 (80%) Cd2Nb2O7 (20%) | d31 = -80 | ε33 = 2000 | k31 = 0.17 | ||
d33 = 200 | k33 = 0.42 | |||||
kr = 0.30 | ||||||
Schofield et al. 1957 [66] | BaTiO3 (95%) CaTiO3 (5%) CoCO3 (0.25%) | d31 = -60 | ε33 = 1605 | kr = 0.33 | ||
Pullin 1962 [72] | BaTiO3 (80%) PbTiO3 (12%) CaTiO3 (8%) | d31 = -31 | k31 = 0.15 | 1200 | ||
d33 = 79 | k33 = 0.41 | |||||
kr = 0.24 | ||||||
Defaÿ 2011 [78] | AlN (Pt-Mo) | d31 = -2.5 | ||||
Shibata et al. 2011 [79] | KNN(Pt-Pt) | <001> | d31 = -96.3 | εr = 1100 | ||
d33 = 138.2 | ||||||
Sessler 1981 [80] | PVDF | d31 = 17.9 | k31 = 10.3 | |||
d32 = 0.9 | k33 = 12.6 | |||||
d33 = -27.1 | ||||||
Ren et al. 2017 [81] | PVDF | d31 = 23 | εr = 106 | |||
d32 = 2 | ||||||
d33 = -21 | ||||||
Tsubouchi et al. 1981 [82] | Epi AlN/Al2O3 | <001> | d33 = 5.53 | ε33 = 9.5 | kt = 6.5 | 2490 |
Nanomaterials | |||||
---|---|---|---|---|---|
Reference | Material | Structure | Piezoelectric coefficients, d (pC/N) | Characterization method | Size (nm) |
Ke et al. 2008 [83] | NaNbO3 | nanowire | d33 = 0.85-4.26 pm/V | PFM | d = 100 |
Wang et al. 2008 [84] | KNbO3 | nanowire | d33 = 0.9 pm/V | PFM | d = 100 |
Zhang et al. 2004 [85] | PZT | nanowire | PFM | d = 45 | |
Zhao et al. 2004 [86] | ZnO | nanobelt | d33 = 14.3-26.7 pm/V | PFM | w = 360 t = 65 |
Luo et al. 2003 [87] | PZT | nanoshell | d33 = 90 pm/V | PFM | d = 700 t = 90 |
Yun et al. 2002 [88] | BaTiO3 | nanowire | d33 = 0.5 pm/V | PFM | d = 120 |
Lin et al. 2008 [89] | CdS | nanowire | Bending with AFM tip | d = 150 | |
Wang et al. 2007 [90] | PZT | nanofiber | piezoelectric voltage constant~0.079 Vm/N | Bending using a tungsten probe | d = 10 |
Wang et al. 2007 [91] | BaTiO3 | - | d33 = 45 pC/N | Direct tensile test | d ~ 280 |
Jeong et al. 2014 [92] | Alkaline niobate (KNLN) | film | d33 = 310 pC/N | - | |
Park et al. 2010 [93] | BaTiO3 | Thin film | d33 = 190 pC/N | ||
Stoppel et al. 2011 [94] | AlN | Thin film | d33 =5 pC/N | AFM | |
Lee et al. 2017 [95] | WSe2 | 2D nanosheet | d11 = 3.26 pm/V | ||
Zhu et al. 2014 [96] | MoS2 | Free standing layer | e11 = 2900pc/m | AFM | |
Zhong et al. 2017 [97] | PET/EVA/PET | film | d33 = 6300 pC/N | ||
Piezoelectricity is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived from Ancient Greek πιέζω (piézō) 'to squeeze or press' and ἤλεκτρον (ḗlektron) 'amber'. The German form of the word (Piezoelektricität) was coined in 1881 by the German physicist Wilhelm Gottlieb Hankel; the English word was coined in 1883.
In physics and materials science, ferroelectricity is a characteristic of certain materials that have a spontaneous electric polarization that can be reversed by the application of an external electric field. All ferroelectrics are also piezoelectric and pyroelectric, with the additional property that their natural electrical polarization is reversible. The term is used in analogy to ferromagnetism, in which a material exhibits a permanent magnetic moment. Ferromagnetism was already known when ferroelectricity was discovered in 1920 in Rochelle salt by American physicist Joseph Valasek. Thus, the prefix ferro, meaning iron, was used to describe the property despite the fact that most ferroelectric materials do not contain iron. Materials that are both ferroelectric and ferromagnetic are known as multiferroics.
Lead zirconate titanate, also called lead zirconium titanate and commonly abbreviated as PZT, is an inorganic compound with the chemical formula Pb[ZrxTi1−x]O3(0 ≤ x ≤ 1).. It is a ceramic perovskite material that shows a marked piezoelectric effect, meaning that the compound changes shape when an electric field is applied. It is used in a number of practical applications such as ultrasonic transducers and piezoelectric resonators. It is a white to off-white solid.
In electromagnetism, electrostriction is a property of all electrical non-conductor or dielectrics. Electrostriction causes these materials to change their shape under the application of an electric field. It is the dual property to magnetostriction.
Electroceramics are a class of ceramic materials used primarily for their electrical properties.
Barium titanate (BTO) is an inorganic compound with chemical formula BaTiO3. It is the barium salt of metatitanic acid. Barium titanate appears white as a powder and is transparent when prepared as large crystals. It is a ferroelectric, pyroelectric, and piezoelectric ceramic material that exhibits the photorefractive effect. It is used in capacitors, electromechanical transducers and nonlinear optics.
Lithium niobate is a synthetic salt consisting of niobium, lithium, and oxygen. Its single crystals are an important material for optical waveguides, mobile phones, piezoelectric sensors, optical modulators and various other linear and non-linear optical applications. Lithium niobate is sometimes referred to by the brand name linobate.
Isamu Akasaki was a Japanese engineer and physicist, specializing in the field of semiconductor technology and Nobel Prize laureate, best known for inventing the bright gallium nitride (GaN) p-n junction blue LED in 1989 and subsequently the high-brightness GaN blue LED as well.
The Burns temperature, Td, is the temperature where a ferroelectric material, previously in paraelectric state, starts to present randomly polarized nanoregions, that are polar precursor clusters. This behaviour is typical of several, but not all, ferroelectric materials, and was observed in lead titanate (PbTiO3), potassium niobate (KNbO3), lead lanthanum zirconate titanate (PLZT), lead magnesium niobate (PMN), lead zinc niobate (PZN), K2Sr4(NbO3)10, and strontium barium niobate (SBN), Na1/2Bi1/2O3 (NBT).
Ferroelectric polymers are a group of crystalline polar polymers that are also ferroelectric, meaning that they maintain a permanent electric polarization that can be reversed, or switched, in an external electric field.
Lead(II) titanate is an inorganic compound with the chemical formula PbTiO3. It is the lead salt of titanic acid. Lead(II) titanate is a yellow powder that is insoluble in water.
Strontium barium niobate is the chemical compound SrxBa1−xNb2O6 for 0.32≤x≤0.82.
Relaxor ferroelectrics are ferroelectric materials that exhibit high electrostriction. As of 2015, although they have been studied for over fifty years, the mechanism for this effect is still not completely understood, and is the subject of continuing research.
Sodium bismuth titanate or bismuth sodium titanium oxide (NBT or BNT) is a solid inorganic compound of sodium, bismuth, titanium and oxygen with the chemical formula of Na0.5Bi0.5TiO3 or Bi0.5Na0.5TiO3. This compound adopts the perovskite structure.
A polar metal, metallic ferroelectric, or ferroelectric metal is a metal that contains an electric dipole moment. Its components have an ordered electric dipole. Such metals should be unexpected, because the charge should conduct by way of the free electrons in the metal and neutralize the polarized charge. However they do exist. Probably the first report of a polar metal was in single crystals of the cuprate superconductors YBa2Cu3O7−δ. A polarization was observed along one (001) axis by pyroelectric effect measurements, and the sign of the polarization was shown to be reversible, while its magnitude could be increased by poling with an electric field. The polarization was found to disappear in the superconducting state. The lattice distortions responsible were considered to be a result of oxygen ion displacements induced by doped charges that break inversion symmetry. The effect was utilized for fabrication of pyroelectric detectors for space applications, having the advantage of large pyroelectric coefficient and low intrinsic resistance. Another substance family that can produce a polar metal is the nickelate perovskites. One example interpreted to show polar metallic behavior is lanthanum nickelate, LaNiO3. A thin film of LaNiO3 grown on the (111) crystal face of lanthanum aluminate, (LaAlO3) was interpreted to be both conductor and a polar material at room temperature. The resistivity of this system, however, shows an upturn with decreasing temperature, hence does not strictly adhere to the definition of a metal. Also, when grown 3 or 4 unit cells thick (1-2 nm) on the (100) crystal face of LaAlO3, the LaNiO3 can be a polar insulator or polar metal depending on the atomic termination of the surface. Lithium osmate, LiOsO3 also undergoes a ferrorelectric transition when it is cooled below 140K. The point group changes from R3c to R3c losing its centrosymmetry. At room temperature and below, lithium osmate is an electric conductor, in single crystal, polycrystalline or powder forms, and the ferroelectric form only appears below 140K. Above 140K the material behaves like a normal metal. Artificial two-dimensional polar metal by charge transfer to a ferroelectric insulator has been realized in LaAlO3/Ba0.8Sr0.2TiO3/SrTiO3 complex oxide heterostructures.
Kenji Uchino is an American electronics engineer, physicist, academic, inventor and industry executive. He is currently an academy professor of Electrical Engineering, Emeritus Academy Institute at Pennsylvania State University, where he also directs the International Center for Actuators and Transducers at Materials Research Institute. He is the former associate director at The US Office of Naval Research – Global Tokyo Office.
Lead magnesium niobate is a relaxor ferroelectric. It has been used to make piezoelectric microcantilever sensors.
Jürgen Rödel is a German materials scientist and professor of non-metallic inorganic materials at the Technische Universität Darmstadt.
Dragan Damjanovic is a Swiss-Bosnian-Herzegovinian materials scientist. From 2008 to 2022, he was a professor of material sciences at EPFL and head of the Group for Ferroelectrics and Functional Oxides.
Nickel niobate is a complex oxide which as a solid material has found potential applications in catalysis and lithium batteries.
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: CS1 maint: DOI inactive as of November 2024 (link)