Inorganic Chemicals Industry >
Dielectric properties and electrocaloric effect of SiO2 doped Ba0.65Sr0.35TiO3 ceramics
Received date: 2019-09-16
Online published: 2020-03-31
SiO2 doped barium strontium titanate（Ba0.65Sr0.35TiO3,BST） ceramics（BST+x%SiO2 ） were prepared by traditional solidstate reaction method.The effects of SiO2 doping on the phase,morphology,dielectric properties and electrocaloric effect of BST ceramics were studied.The results showed that doping SiO2 didn′t change the crystal structure of BST ceramics,but improved the uniformity of grain and the frequency stability of dielectric properties of BST ceramics.With the increase of SiO2 content,the dielectric constant decreased monotonously,the dielectric dispersion characteristics increased gradually.The doping of SiO2 was beneficial to improve the electrocaloric performance of BST ceramics.Among them,BST+3% SiO2 ceramic possessedthe best electrocaloric effect,and the temperature of the maximum electrocaloric adiabatic temperature change （ΔTmax) was 30 ℃.Its ΔTmax and ΔTmax/ΔE were 1.6 ℃ and 8.00×10 -7 ℃·m/V respectively,the half-width of the electrocaloric effect（Tspan）was about 10 ℃.
Linhong Ouyang , Wenqian Wang , Wenwei Wang , Jieru Wu , Hao Xue . Dielectric properties and electrocaloric effect of SiO2 doped Ba0.65Sr0.35TiO3 ceramics[J]. Inorganic Chemicals Industry, 2020 , 52(3) : 39 -44 . DOI: 10.11962/1006-4990.2019-0266
| [1] | Wiseman G G, Kuebler J K . Electrocaloric effect in ferroelectric rochelle salt[J]. Physical Review, 1963,131(5):2023-2027. |
| [2] | Wu H H, Cohen R E . Polarization rotation and the electrocaloric ef-fect in barium titanate[J]. Journal of Physics:Condensed Matter, 2017,29(48):485704. |
| [3] | Tuttle B A, Payne D A . The effects of microstructure on the electro-caloric properties of Pb(Zr,Sn,Ti)O3 ceramics[J]. Ferroelectrics, 1981,37(1):603-606. |
| [4] | Fuith A, Kabelka H, Birks E , et al. Thermodynamic properties at the phase transition of Pb(Zr,Sn,Ti)O3 solid solutions[J]. Ferroelectri-cs, 2000,237(1):153-159. |
| [5] | Ge P Z, Tang X G, Liu Q X , et al. Energy storage properties and elec-trocaloric effect of Ba0.65Sr0.35TiO3 ceramics near room temperatu-re[J]. Journal of Materials Science:Materials in Electronics, 2018,29(2):1075-1081. |
| [6] | Kumar M, Rani S, Bhatnagar M C , et al. Structure,ferroelectric and gas sensing properties of sol-gel derived(Ba,Sr)(Ti,Zr)O3 thin films[J]. Materials Chemistry & Physics, 2008,107(2/3):399-403. |
| [7] | Xu Z, Qiang H . Enhanced electrocaloric effect in Mn+Y co-doped BST ceramics near room temperature[J]. Materials Letters, 2017,191:57-60. |
| [8] | Liu X Q, Chen T T, Wu Y J , et al. Enhanced electrocaloric effects in spark plasma-sintered Ba0.65Sr0.35TiO3-based ceramics at room temperature[J]. Journal of the American Ceramic Society, 2013,96(4):1021-1023. |
| [9] | Wu T, Pu Y, Gao P , et al. Influence of Sr/Ba ratio on the energy stor-age properties and dielectric relaxation behaviors of strontium bari-um titanate ceramics[J]. Journal of Materials Science:Materials in Electronics, 2013,24(10):4105-4112. |
| [10] | 陈锋, 刘秋香 . (Ba0.8Sr0.2)1-1.5xBixTiO3陶瓷的弥散相变和高温介电异常研究[J]. 广东工业大学学报, 2016,33(5):69-76. |
| [11] | Tang X F, Tang Z L, Zhou Z G . Complex impedance spectra of BaTiO3 based PTCR ceramics[J]. Journal of Inorganic Materials, 2000,15(6):1037-1042. |
| [12] | Arlt G, Peusens H . The dielectric constant of coarse grained BaTiO3 ceramics[J]. Ferroelectrics, 1983,48(1):213-224. |
| [13] | Buessem W R, Cross L E, Goswami A K . Phenomenological theory of high permittivity in fine-grained barium titanate[J]. Journal of the American Ceramic Society, 1966,49(1):33-36. |
| [14] | 张庆猛, 董桂霞, 崔建东 , 等. BaO-SiO2-B2O3玻璃添加剂对Ba0.4Sr0.6TiO3陶瓷致密度和介电性能的影响[J]. 材料导报, 2008,22(Z2):339-341,347. |
| [15] | 庄后荣, 杨继安, 李艳红 , 等. 钛酸锶钡陶瓷的制备及介电性能[J]. 粉末冶金材料科学与工程, 2012,17(5):650-656. |
| [16] | Bai Y, Qin S, Nie W , et al. Influence of microstructure features on electrocaloric effect in ferroelectric ceramics[J]. Ceramics Interna-tional, 2018,44(7):8263-8269. |
| [17] | Hong X K, Hu G J, Chen J , et al. Structural and electric properties of sol-gel-derived Ba0.9Sr0.1TiO3 multilayers[J]. Journal of the Am-erican Ceramic Society, 2007,90(4):1280-1282. |
| [18] | Yoo J H, Gao W, Yoon K H . Pyroelectric and dielectric bolometer properties of Sr modified BaTiO3 ceramics[J]. Journal of Materials Science, 1999,34(21):5361-5369. |
| [19] | 陈墨 . 热压烧结PLZT陶瓷的电卡特性及温区展宽效应研究[D]. 武汉:华中科技大学, 2017. |
| [20] | Valant M . Electrocaloric materials for future solid-state refrigeration technologies[J]. Progress in Materials Science, 2012,57(6):980-1009. |
/
| 〈 |
|
〉 |