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High-temperature piezoelectric and dielectric energy storage lead-free ceramic and preparation method thereof
The invention discloses a lead-free ceramic dielectric material with high temperature piezoelectric performance and high energy storage density. The composition is represented as formulas as follows: (1-x-y)BiFeO3-xBaTiO3-yMeNbO3 +0.005(0.5MnO2-0.3CuO-0.2CeO2) or (1-x-y)BiFeO3-xBaTiO3-yMeTaO3 +0.005 (0.5MnO2-0.3CuO-0.2CeO2) or (1-x-y)BiFeO3-xBaTiO3-yMeSbO3 +0.005 (0.5MnO2-0.3CuO- 0.2CeO2), wherein Me is one or two of alkali metal elements Li, Na and K; x and y represent mole fraction, x is larger than or equal to 0.1 and smaller than or equal to 0.5, y is larger than or equal to 0.05 and smaller than or equal to 0.3. The uniform and compact ceramic with controllable constituent structure gradient is obtained in combination of step-by-step synthesis and two-step sintering. The ceramic with high temperature piezoelectric performance and high energy storage density has excellent energy storage density, high piezoelectric constant and high Curie temperature, the energy storage density can be up to 1.1 J/cm <3>, the piezoelectric constant d33 can be up to 282 pm/V, the strain can be up to 0.22%, the Curie temperature can be up to 501 DEG C, and the ceramic is green, environment-friendly and good in practicability.
High-temperature piezoelectric and dielectric energy storage lead-free ceramic and preparation method thereof
The invention discloses a lead-free ceramic dielectric material with high temperature piezoelectric performance and high energy storage density. The composition is represented as formulas as follows: (1-x-y)BiFeO3-xBaTiO3-yMeNbO3 +0.005(0.5MnO2-0.3CuO-0.2CeO2) or (1-x-y)BiFeO3-xBaTiO3-yMeTaO3 +0.005 (0.5MnO2-0.3CuO-0.2CeO2) or (1-x-y)BiFeO3-xBaTiO3-yMeSbO3 +0.005 (0.5MnO2-0.3CuO- 0.2CeO2), wherein Me is one or two of alkali metal elements Li, Na and K; x and y represent mole fraction, x is larger than or equal to 0.1 and smaller than or equal to 0.5, y is larger than or equal to 0.05 and smaller than or equal to 0.3. The uniform and compact ceramic with controllable constituent structure gradient is obtained in combination of step-by-step synthesis and two-step sintering. The ceramic with high temperature piezoelectric performance and high energy storage density has excellent energy storage density, high piezoelectric constant and high Curie temperature, the energy storage density can be up to 1.1 J/cm <3>, the piezoelectric constant d33 can be up to 282 pm/V, the strain can be up to 0.22%, the Curie temperature can be up to 501 DEG C, and the ceramic is green, environment-friendly and good in practicability.
High-temperature piezoelectric and dielectric energy storage lead-free ceramic and preparation method thereof
ZHOU CHANGRONG (Autor:in) / LI QINGNING (Autor:in) / XU JIWEN (Autor:in) / YUAN CHANGLAI (Autor:in) / ZENG WEIDONG (Autor:in) / CHEN GUOHUA (Autor:in)
03.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2015
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