Impact mechanism of gel’s alkali circumstance on the morphologies and electrical properties of Ba0.80Sr0.20TiO3 ceramics

Tian, Yongshang; Cao, Lijia; Chen, Zhijia; Gong, Yansheng; Tang, Yitian; Jing, Qiangshan

doi:10.1007/s10971-019-04959-8

Cited by 3 publications

(1 citation statement)

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“…Material: The BST-BNT: x(Sm, Mg) (0 ≤ x ≤ 0.25 wt%) polycrystalline nanoparticles were prepared by the Pechini sol-gel method explicitly discussing in our published work. [48] Ethylene glycol (C 2 H 6 O 2 , Sinopharm Chemical Reagent Co., Ltd., 99.0% purity) and citric acid monohydrate (C 6 H 10 O 8 , Sinopharm Chemical Reagent Co., Ltd., 99.5% purity) were mixed by 4:1 ratio, with the tetrabutyl titanate (Ti(OBu) 4 , Sinopharm Chemical Reagent Co., Ltd., 98.0% purity) added to the mixture as soon as the citric acid was dissolved to make a homogeneous modified precursor. The polycondensation reaction ended after 4 h of magnetic stirring at 55 °C.…”

Section: Methodsmentioning

confidence: 99%

Understanding Crystal Spatial Symmetry of Sm/Mg Heterovalent‐Doped BST–BNT Ceramics: An Effect Mechanism for Electrical Properties

Cao,

Zeng,

Chen

et al. 2023

Physica Status Solidi (a)

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The effect mechanism of lattice distortion caused by heterovalent rare‐earth and alkaline‐earth ions co‐doping in the electrical properties of piezo‐ceramics is generally concerning. Herein, the 0.65(Ba0.96Sr0.04TiO3)‐0.35(Bi0.50Na0.50TiO3)‐x(Sm2O3‐MgO) (BST‐BNT‐xSM) (0 ≤ x ≤ 0.25wt.%) ceramics were prepared by Pechini sol‐gel method. The reversibility transition from the tetragonal P4/mmm relaxation paraelectric phase to the tetragonal P4mm relaxation FE phase confirms the doping‐modulated piezoelectric constants’ response to the spatial symmetry. Excessive Sm3+ and Mg2+ in the interstitial lattice inhibit the Jahn‐Teller effect of distortion in the crystal spatial symmetry. The restored P4/mmm spatial symmetry of BST‐BNT‐xSM (x = 0.15wt.%) ceramics contributes to the large electric‐induced strain, increased Curie temperature, and the stabilized frequency dependence of the Curie temperature (TC (1 MHz) = 167 °C, εr (1 MHz) = 2151.92, d33 = 43 pC N−1, Smax/Emax = 535.22 pm V−1). The samples with large electric‐induced strain and good temperature stability of electrical properties can be applied in the heat dissipation actuators.This article is protected by copyright. All rights reserved.

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Section: Methodsmentioning

confidence: 99%