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Lead-free high-entropy ferroelectric ceramic material as well as preparation method and application thereof
The invention discloses a lead-free high-entropy ferroelectric ceramic material and a preparation method and application thereof, and relates to the technical field of ceramic materials, the chemical formula of the ceramic material is (0.67-x) BiFeO3-0. 33 BaTiO3-xSr (Mg1/6Zn1/6Ta1/3Nb1/3) O3, wherein x is equal to 0.04 or 0.06 or 0.08 or 0.10, and x represents a molar fraction. Multi-principal component components are introduced into BFBT-based lead-free relaxed ceramic through a'high entropy design 'strategy, so that the ceramic body structure is high in entropy, the random field and relaxation performance of the body can be improved, symmetric breaking of a crystal structure is induced, a trigonal phase (R3c) and pseudo-cubic phase (Pm-3m) coexisting structure is formed, meanwhile, grains are refined, and polar nano micro-regions (PNRs) which are small in size and are uniformly distributed are formed, so that the BFBT-based lead-free relaxed ceramic is obtained. Therefore, the formed high-entropy ferroelectric ceramic material has better energy storage performance and ultrahigh mechanical property; the discovery of the micromechanisms has great significance and value for the physical origin of the excellent performance of the high-entropy ferroelectric ceramic and the further optimization of the performance of the high-entropy ferroelectric ceramic in the future.
本发明公开了一种无铅高熵铁电陶瓷材料及其制备方法和应用，涉及陶瓷材料技术领域，陶瓷材料的化学式为：(0.67‑x)BiFeO3‑0.33BaTiO3‑xSr(Mg1/6Zn1/6Ta1/3Nb1/3)O3；其中，x=0.04或0.06或0.08或0.10，且x表示摩尔分数。通过“高熵设计”策略往BFBT基无铅弛豫陶瓷中引入多主元成分，使陶瓷机体组织高熵化，能够提高机体的随机场与弛豫性能，诱导晶体结构对称性破缺，形成三方相（R3c）与赝立方相（Pm‑3m）共存结构，同时，晶粒细化，形成尺度较小且均匀分布的极性纳米微区（PNRs），导致形成的高熵铁电陶瓷材料获得较好的储能性能及超高的力学性能；这些微观机理的发现对该高熵铁电陶瓷优异性能的物理起源及对其今后性能的进一步优化有着重大的意义与价值。
Lead-free high-entropy ferroelectric ceramic material as well as preparation method and application thereof
The invention discloses a lead-free high-entropy ferroelectric ceramic material and a preparation method and application thereof, and relates to the technical field of ceramic materials, the chemical formula of the ceramic material is (0.67-x) BiFeO3-0. 33 BaTiO3-xSr (Mg1/6Zn1/6Ta1/3Nb1/3) O3, wherein x is equal to 0.04 or 0.06 or 0.08 or 0.10, and x represents a molar fraction. Multi-principal component components are introduced into BFBT-based lead-free relaxed ceramic through a'high entropy design 'strategy, so that the ceramic body structure is high in entropy, the random field and relaxation performance of the body can be improved, symmetric breaking of a crystal structure is induced, a trigonal phase (R3c) and pseudo-cubic phase (Pm-3m) coexisting structure is formed, meanwhile, grains are refined, and polar nano micro-regions (PNRs) which are small in size and are uniformly distributed are formed, so that the BFBT-based lead-free relaxed ceramic is obtained. Therefore, the formed high-entropy ferroelectric ceramic material has better energy storage performance and ultrahigh mechanical property; the discovery of the micromechanisms has great significance and value for the physical origin of the excellent performance of the high-entropy ferroelectric ceramic and the further optimization of the performance of the high-entropy ferroelectric ceramic in the future.
本发明公开了一种无铅高熵铁电陶瓷材料及其制备方法和应用，涉及陶瓷材料技术领域，陶瓷材料的化学式为：(0.67‑x)BiFeO3‑0.33BaTiO3‑xSr(Mg1/6Zn1/6Ta1/3Nb1/3)O3；其中，x=0.04或0.06或0.08或0.10，且x表示摩尔分数。通过“高熵设计”策略往BFBT基无铅弛豫陶瓷中引入多主元成分，使陶瓷机体组织高熵化，能够提高机体的随机场与弛豫性能，诱导晶体结构对称性破缺，形成三方相（R3c）与赝立方相（Pm‑3m）共存结构，同时，晶粒细化，形成尺度较小且均匀分布的极性纳米微区（PNRs），导致形成的高熵铁电陶瓷材料获得较好的储能性能及超高的力学性能；这些微观机理的发现对该高熵铁电陶瓷优异性能的物理起源及对其今后性能的进一步优化有着重大的意义与价值。
Lead-free high-entropy ferroelectric ceramic material as well as preparation method and application thereof
一种无铅高熵铁电陶瓷材料及其制备方法和应用
XIE SHAOXIONG (author) / CHEN SHUAI (author) / WANG TING (author) / WANG QINGYUAN (author)
2024-03-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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