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Lead-free relaxor ferroelectric solid solution and preparation method thereof
The invention provides a lead-free relaxor ferroelectric solid solution and a preparation method thereof, the chemical composition of the lead-free relaxor ferroelectric solid solution is 0.9 ((1-x) BaTi0. 8Zr0. 2O3-xBa0. 65Sr0. 35TiO3)-0.1 BaTiO3-y% MgO, x represents the molar coefficient, y represents the mass fraction, x is more than or equal to 0.2 and less than or equal to 0.8, and y is more than 0 and less than or equal to 0.5. According to the invention, through ternary compounding of BZT, BST and BT ferroelectric, the BT ferroelectric with high polarization intensity is introduced to synergistically improve the polarization behavior of the ceramic, and the electrocaloric temperature change, energy storage density and pyroelectric current of the system are significantly improved; the MgO nano powder is introduced into the interface of the ternary composite lead-free relaxor ferroelectric solid solution, so that a barrier layer can be formed, an electric field amplification effect can be generated, the breakdown field strength is increased, and the electrocaloric and energy storage characteristics are improved.
本发明提出了一种无铅弛豫铁电固溶体及其制备方法，所述无铅弛豫铁电固溶体的化学组成为0.9((1‑x)BaTi0.8Zr0.2O3‑xBa0.65Sr0.35TiO3)‑0.1BaTiO3‑y％MgO，其中x表示摩尔系数，y表示质量分数，0.2≤x≤0.8，0＜y≤0.5。本发明中通过设置BZT、BST和BT铁电体三元复合，引入高极化强度的BT铁电体以协同提升陶瓷的极化行为，显著提升了体系的电卡温变、储能密度和热释电电流；通过在三元复合的无铅弛豫铁电固溶体界面处引入MgO纳米粉体，可以形成阻挡层并产生电场放大效果，使得击穿场强增加，提升电卡和储能特性。
Lead-free relaxor ferroelectric solid solution and preparation method thereof
The invention provides a lead-free relaxor ferroelectric solid solution and a preparation method thereof, the chemical composition of the lead-free relaxor ferroelectric solid solution is 0.9 ((1-x) BaTi0. 8Zr0. 2O3-xBa0. 65Sr0. 35TiO3)-0.1 BaTiO3-y% MgO, x represents the molar coefficient, y represents the mass fraction, x is more than or equal to 0.2 and less than or equal to 0.8, and y is more than 0 and less than or equal to 0.5. According to the invention, through ternary compounding of BZT, BST and BT ferroelectric, the BT ferroelectric with high polarization intensity is introduced to synergistically improve the polarization behavior of the ceramic, and the electrocaloric temperature change, energy storage density and pyroelectric current of the system are significantly improved; the MgO nano powder is introduced into the interface of the ternary composite lead-free relaxor ferroelectric solid solution, so that a barrier layer can be formed, an electric field amplification effect can be generated, the breakdown field strength is increased, and the electrocaloric and energy storage characteristics are improved.
本发明提出了一种无铅弛豫铁电固溶体及其制备方法，所述无铅弛豫铁电固溶体的化学组成为0.9((1‑x)BaTi0.8Zr0.2O3‑xBa0.65Sr0.35TiO3)‑0.1BaTiO3‑y％MgO，其中x表示摩尔系数，y表示质量分数，0.2≤x≤0.8，0＜y≤0.5。本发明中通过设置BZT、BST和BT铁电体三元复合，引入高极化强度的BT铁电体以协同提升陶瓷的极化行为，显著提升了体系的电卡温变、储能密度和热释电电流；通过在三元复合的无铅弛豫铁电固溶体界面处引入MgO纳米粉体，可以形成阻挡层并产生电场放大效果，使得击穿场强增加，提升电卡和储能特性。
Lead-free relaxor ferroelectric solid solution and preparation method thereof
无铅弛豫铁电固溶体及其制备方法
TIAN YAHUI (Autor:in) / XUE FEI (Autor:in) / GUO FANGFANG (Autor:in) / QIU LAN (Autor:in)
29.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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