scholarly journals High piezoelectric properties and good temperature stabilities of CuO-modified Ba(Ti0.96SnxZr0.04-x)O3 ceramics

2013 ◽  
Vol 03 (02) ◽  
pp. 1350014 ◽  
Author(s):  
Y. Q. Tan ◽  
J. L. Zhang ◽  
C. L. Wang
Keyword(s):  
Thermal Aging ◽  
Piezoelectric Properties ◽  
Temperature Stability ◽  
Aging Effect ◽  
Aging Behavior ◽  
Sintering Aid ◽  
Temperature Range ◽  
Dense Microstructure ◽  
The Common ◽  
High Piezoelectric Property

In order to obtain both high piezoelectric property and good temperature stability in BaTiO 3-based ceramics in the common usage temperature range, Sn 4+ and Zr 4+ are co-doped into BaTiO 3 ceramics according to the formula of Ba ( Ti 0.96 Sn x Zr 0.04-x) O 3 (BTSZ) (x = 0.01–0.4) with 1 mol% CuO being added as sintering-aid in this study. The CuO -modified BTSZ ceramics show both high piezoelectric properties and good temperature stability. Particularly, the CuO -modified Ba ( Ti 0.96 Sn 0.01 Zr 0.03) O 3 ceramic displays the high piezoelectric properties of d33 = 350 pC/N, k p = 49.5% at room-temperature and a weak temperature dependence of kp in the temperature range of -15°C and 60°C. Moreover, the CuO -modified Ba ( Ti 0.96 Sn 0.01 Zr 0.03) O 3 ceramic shows stable thermal aging behavior with the d33 being almost unchanged until the aging temperature of 100°C, which is even higher than its Curie temperature. The high piezoelectric properties of CuO -modified Ba ( Ti 0.96 Sn 0.01 Zr 0.03) O 3 ceramic were ascribed to the dense microstructure with small and uniform grain size distribution. The stable thermal aging behavior can be explained by the aging effect based on the defect dipolar model.

scholarly journals Simultaneously improving piezoelectric properties and temperature stability of Na0.5K0.5NbO3 (KNN)-based ceramics sintered in reducing atmosphere

2021 ◽  
Author(s):  
Zhenyong Cen ◽  
Shuaishuai Bian ◽  
Ze Xu ◽  
Ke Wang ◽  
Limin Guo ◽  
...  
Keyword(s):  
Grain Size ◽  
Alkali Metal ◽  
Oxygen Vacancies ◽  
Piezoelectric Properties ◽  
Temperature Stability ◽  
Conventional Solid State Reaction ◽  
Sintering Aid ◽  
Reducing Atmosphere ◽  
Piezoelectric Strain ◽  
Free Material

AbstractIt is a very difficult work to sinter K0.5Na0.5NbO3 (KNN)-based materials with good reduction resistance in strong reducing atmosphere. 0.945K0.48Na0.52Nb0.96Ta0.04O3−0.055BaZrO3 + 0.03ZrO2 + y mol%MnO (KNNT−0.055BZ + 0.03Zr + yMn) ceramics sintered in reducing atmosphere were prepared successfully by conventional solid-state reaction methods. MnO dopant increases grain size at y = 5–8 due to strong lattice distortion and then decreases grain size at y = 9 due to much Mn4Nb2O9 accumulated at the grain boundary. MnO dopant as an excellent sintering aid can effectively reduce volatilization of alkali metal by decreasing the sintering temperature (Tsinter). Reducing alkali metal volatilization can greatly reduce oxygen vacancies and improve piezoelectric properties. MnO dopant can improve the anti-reduction properties. The KNNT−0.055BZ + 0.03Zr + yMn ceramics at y = 6–9 show outstanding anti-fatigue of unipolar piezoelectric strain under the synergistic effect of reduced oxygen vacancies due to reduced volatilization and increased grain size. Piezoelectric properties and temperature stability of KNNT−0.055BZ + 0.03Zr ceramics sintered in reducing atmosphere are improved simultaneously by MnO dopant. Optimum inverse piezoelectric coefficient (d 33 * ) of ceramics at y = 8 reaches up to 480 pm/V under low driving electric field E = 20 kV/cm at room temperature, and its temperature stability of d 33 * reaches 158 °C. It will be an excellent lead-free material candidate for the preparation of multilayer piezoelectric actuators co-fired with nickel electrode.

Crystal growth and characterization of thulium calcium oxyborate high-temperature piezoelectric crystals

CrystEngComm ◽  
2015 ◽  
Vol 17 (3) ◽  
pp. 553-560 ◽  
Author(s):  
Shuai Hou ◽  
Fapeng Yu ◽  
Yanqing Liu ◽  
Shujun Zhang ◽  
Qingming Lu ◽  
...  
Keyword(s):  
Crystal Growth ◽  
High Temperature ◽  
Piezoelectric Properties ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Piezoelectric Crystals ◽  
Temperature Range

High-temperature stability of electromechanical and piezoelectric properties was obtained for TmCa4O(BO3)3 crystals over the temperature range of 20–900 °C.

scholarly journals Thermal Expansion and Electro-Elastic Features of Ba2TiSi2O8 High Temperature Piezoelectric Crystal

Crystals ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 11 ◽  
Author(s):  
Chao Jiang ◽  
Feifei Chen ◽  
Fapeng Yu ◽  
Shiwei Tian ◽  
Xiufeng Cheng ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Elastic Properties ◽  
Piezoelectric Coefficient ◽  
Linear Thermal Expansion ◽  
Temperature Stability ◽  
Promising Candidate ◽  
Temperature Range ◽  
Sensor Applications ◽  
High Temperature Sensor

A high-quality Ba2TiSi2O8 (BTS) single crystal was grown using the Czochralski (Cz) pulling method. The thermal expansion and electro-elastic properties of BTS crystal were studied for high temperature sensor applications. The relative dielectric permittivities ε 11 T / ε 0 and ε 33 T / ε 0 were determined to be 16.3 and 11.8, while the piezoelectric coefficients d15, d31, d33 were found to be 17.8, 2.9, and 4.0 pC/N, respectively. Temperature dependence of electro-elastic properties were investigated, where the variation of elastic compliance s 55 E (= s 44 E ) was found to be <6% over temperature range of 20–700 °C. Taking advantage of the anisotropic thermal expansion, linear thermal expansion comparable to insulating alumina ceramic was achieved over temperature range up to 650 °C. The optimum crystal cut with large effective piezoelectric coefficient (>8.5 pC/N) and linear thermal expansion coefficient (8.03 ppm/°C) achieved for BTS crystal along the (47°, φ) direction (φ is arbitrary in 0–360°), together with its good temperature stability up to 650 °C, make BTS crystal a promising candidate for high temperature piezoelectric sensors.

scholarly journals Dielectric tunable characteristics of compositional-gradient BaTi1−xSnxO3 thin films

2021 ◽  
Vol 11 (04) ◽  
pp. 2150019
Author(s):  
Chenjing Wu ◽  
Manwen Yao
Keyword(s):  
Thin Films ◽  
Impedance Matching ◽  
Sol Gel ◽  
Temperature Stability ◽  
Dielectric Behavior ◽  
Compositional Gradient ◽  
Dielectric Tunability ◽  
Temperature Range ◽  
Si Substrates ◽  
Low Leakage

Compositional-gradient [Formula: see text][Formula: see text]O3 thin films on Pt(100)/Ti/SiO2/Si substrates are fabricated with sol–gel using spin coating. All of the structures of the prepared thin films are of single-phase crystalline perovskite with a dense and crack-free surface morphology. BTS10/15/20 thin film exhibits enhanced temperature stability in its dielectric behavior. The temperature coefficient of capacitance [Formula: see text] in the temperature range from [Formula: see text]C to [Formula: see text]C is [Formula: see text]C and that of [Formula: see text] in the temperature range from [Formula: see text]C to [Formula: see text]C is [Formula: see text]C. Furthermore, the thin films show low leakage current density and dielectric loss. High and stable dielectric tunable performances are found in BTS10/15/20 thin films: the dielectric tunability of the thin films is around 20.1% under a bias voltage of 8 V at 1 MHz and the corresponding dielectric constant is in the range between 89 and 111, which is beneficial for impedance matching in circuits. Dielectric tunability can be obtained under a low tuning voltage, which helps ensure safety. The simulated resonant frequency of the compositional-gradient BTS thin films depends on the bias electric field, showing compositional-gradient BTS thin films could be used in electrically tunable components and devices. These properties make compositional-gradient BTS thin films a promising candidate for dielectric tuning.

Enhanced piezoelectric properties and temperature stability of Bi4Ti3O12-based Aurivillius ceramics via W/Nb substitution

2019 ◽  
Vol 39 (4) ◽  
pp. 957-962 ◽  
Author(s):  
Xinchun Xie ◽  
Tianzi Wang ◽  
Zhiyong Zhou ◽  
Guofeng Cheng ◽  
Ruihong Liang ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Temperature Stability

Study of Thermal Aging Behavior of Epoxy Molding Compound for Applications in Harsh Environments

2019 ◽  
Author(s):  
Adwait Inamdar ◽  
Alexandru Prisacaru ◽  
Martin Fleischman ◽  
Erick Franieck ◽  
Przemyslaw Gromala ◽  
...  
Keyword(s):  
Thermal Aging ◽  
Harsh Environments ◽  
Aging Behavior ◽  
Epoxy Molding Compound ◽  
Molding Compound

Thermal aging effect of vanadyl acetylacetonate precursor for deposition of VO2 thin films with thermochromic properties

2016 ◽  
Vol 82 ◽  
pp. 11-15 ◽  
Author(s):  
Jung-Hoon Yu ◽  
Sang-Hun Nam ◽  
Donguk Kim ◽  
Minha Kim ◽  
Hyeon Jin Seo ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Aging ◽  
Aging Effect ◽  
Vanadyl Acetylacetonate ◽  
Thermochromic Properties ◽  
Vo2 Thin Films

Material Design of Alkaline Niobate Piezoelectric Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 1879-1882 ◽  
Author(s):  
Kenichi Kakimoto
Keyword(s):  
Solid Solution ◽  
Wide Temperature Range ◽  
Piezoelectric Properties ◽  
Tungsten Bronze ◽  
Material Design ◽  
Research Field ◽  
Lead Free ◽  
Ceramic System ◽  
Research Activity ◽  
Temperature Range

Nb-based systems have been considered to be the most attractive ceramic system in the research field of lead-free piezoceramics, since excellent piezoelectric properties were reported in (Li,Na,K)NbO3-based solid solution (LNKN) systems. This article reviews the characteristic and recent research activity for several kinds of the niobate systems including LiNbO3, NaNbO3, KNbO3, tungsten-bronze niobate. The importance of material design for enhancement of piezoelectric properties and their stability in the wide temperature range is also described for LNKN system.

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