Lead zirconate-based antiferroelectric ceramics with improved energy efficiency and method of making same
AssigneeIowa State University Research Foundation, Inc.
InventorsXiaoli Tan, Anand Prakash Singh Gaur, Jun Cui, Binzhi Liu, Duane D. Johnson, Renu
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Abstract
Disclosed are embodiments of an antiferroelectric (AFE) ceramic. The AFE ceramic includes a PbZrO3-based composition. The AFE ceramic has a charge-discharge energy efficiency of at least 96%, and the AFE ceramic has a recoverable energy density of at least 2.8 J/cm3 at a peak field of at least 200 kV/cm. Embodiments of a method of identifying potential AFE ceramic compositions having high energy efficiency and recoverable energy density are also disclosed.
Claims17
An antiferroelectric (AFE) ceramic, comprising:
- a PbZrO3-based composition;
- wherein the AFE ceramic comprises a charge-discharge energy efficiency of at least 96%;
- wherein the AFE ceramic comprises a recoverable energy density of at least 2.8 J/cm at a peak field of at least 200 kV/cm;
- wherein the PbZrO3-based composition has the formula of [Pb(1-x-y-1.5z)SrxBayLaz][Zr(1-u-v)SnuTiv]O3;
- and
- wherein x is in a range from 0.02 to 0.06.
An antiferroelectric (AFE) ceramic, comprising:
- a PbZrO3-based composition;
- wherein the AFE ceramic comprises a charge-discharge energy efficiency of at least 96%;
- wherein the AFE ceramic comprises a recoverable energy density of at least 2.8 J/cm3 at a peak field of at least 200 kV/cm;
- and
- wherein the formula of the PbZrO3-based composition is (Pb0.87Sr0.05Ba0.05La0.02)(Zr0.53Sn0.40Ti0.07)O3.
An antiferroelectric (AFE) ceramic, comprising:
- a PbZrO3-based composition;
- wherein the AFE ceramic comprises a charge-discharge energy efficiency of at least 96%;
- wherein the AFE ceramic comprises a recoverable energy density of at least 2.8 J/cm3 at a peak field of at least 200 kV/cm;
- and
- wherein the formula of the PbZrO3-based composition is (Pb0.87Sr0.05Ba0.05La0.02)(Zr0.52Sn0.40Ti0.08)O3.
An antiferroelectric (AFE) ceramic, comprising:
- a PbZrO3-based composition;
- wherein the AFE ceramic comprises a charge-discharge energy efficiency of at least 96%;
- wherein the AFE ceramic comprises a recoverable energy density of at least 2.8 J/cm3 at a peak field of at least 200 kV/cm;
- and
- wherein the formula of the PbZrO3-based composition is (Pb0.87Sr0.05Ba0.05La0.02)(Zr0.51Sn0.41Ti0.08)O3.
An antiferroelectric (AFE) ceramic, comprising:
- a PbZrO3-based composition;
- wherein the AFE ceramic comprises a charge-discharge energy efficiency of at least 96%;
- wherein the AFE ceramic comprises a recoverable energy density of at least 2.8 J/cm3 at a peak field of at least 200 kV/cm;
- and
- wherein the formula of the PbZrO3-based composition is (Pb0.87Sr0.05Ba0.05La0.02)(Zr0.52Sn0.41Ti0.07)O3.
A method of synthesizing antiferroelectric (AFE) ceramics having a charge-discharge energy efficiency of at least 96%, the method comprising:
- conducting density functional theory calculations on AFE base compositions to identify at least one potential composition based on mismatch strains between AFE phases and ferroelectric (FE) phases, a FE cell angle;
- and AFE phase stability;
- preparing a plurality of samples having compositions that vary by at least 0.1 at % and no more than 3.0 at % of at least one element relative to the at least one potential composition;
- measuring the recoverable energy density and charge-discharge efficiency of the plurality of samples;
- selecting compositions for which the charge-discharge efficiency is at least 96% and the recoverable energy density is at least 2.8 J/cm3 at a peak field of at least 200 kV/cm;
- and
- synthesizing the selected compositions using solid-state reactions.
Dependencies are inferred from the claim text.