以硝酸钡、硝酸锶、草酸和钛酸丁酯为原料,采用草酸盐共沉淀法制备草酸氧钛锶钡(BSTO,Ba_(0.6)Sr_(0.4)TiO(C_2O_4)_2·4H_2O)前躯体粉体,将该前躯体800℃煅烧4 h得到钛酸锶钡(BST,Ba_(0.6)Sr_(0.4)TiO_3)纳米粉体.用差热分析仪研究BSTO的热分解过程,用X射线衍射仪(XRD)和扫描电镜(SEM)研究钛酸锶钡粉体的相组成和微观形貌.结果表明:BSTO前驱体的热分解过程可以分为失去结晶水、草酸氧钛跟(TiO(C_2O_4)_2~(2-))分解和BST结晶化3个阶段;所制备的钛酸锶钡粉体为高纯立方晶相,粉体呈类球状,平均粒径约为100 nm.
Barium-strontium titanyl oxalate (BSTO, Ba_(0.6)Sr_(0.4)TiO(C_2O_4)_2·4H_2O) precursor powders were prepared by oxalate co-precipitation route by using Ba(NO_3)_2, Sr(NO_3)_2, oxalic acid dihydrate and tetrabutyl titanate (Ti(OC_4H_9)_4) as raw materials. The homogeneous barium-strontium titanate (BST, Ba_(0.6)Sr_(0.4)TiO_3) nano-powders were produced from BSTO by calcining at 800 ℃ for 4 h in air. The decomposition process was analyzed by Thermogravimetry-differential thermal analyzer. The phase compositions and morphology of the BST powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the decomposition process of BSTO can be divided into three stages, including the evaporation and elimination of the bonded water, the decomposition of the anionic TiO(C_2O_4)_2~(2-), the crystallization of BST. The BST powders obtained by aforementioned technique are cubic with spherical-like morphology and the particle diameter is about 100 nm.
参考文献
| [1] | Wuxing Zhang;Lihong Xue;Xuecheng Zhou .Fabrication of patterned Ba_(0.71)Sr_(0.29)TiO_3 thick film on Si substrate by tape casting method[J].Journal of the European Ceramic Society,2006(13):2793-2798. |
| [2] | 李明利,徐明霞,梁辉,李晓雷,徐廷献.锰掺杂Ba0.6Sr0.4TiO3-MgTiO3复相陶瓷的制备和介电性能[J].物理化学学报,2008(08):1405-1410. |
| [3] | A. Ioachim;R. Ramer;M.I. Toacsan .Ferroelectric ceramics based on the BaO-SrO-TiO_2 ternary system for microwave applications[J].Journal of the European Ceramic Society,2007(2/3):1177-1180. |
| [4] | Hu, T;Jantunen, H;Deleniv, A;Leppavuori, S;Gevorgian, S .Electric-field-control led permittivity ferroelectric composition for microwave LTCC modules[J].Journal of the American Ceramic Society,2004(4):578-583. |
| [5] | Mohan, CRK;Bajpai, PK .Effect of sintering optimization on the electrical properties of bulk BaxSr1-xTiO3 ceramics[J].Physica. B, Condensed Matter,2008(13/16):2173-2188. |
| [6] | Se-Ho Kim;Jung-Hyuk Koh .ZnBO-doped (Ba, Sr)TiO3 ceramics for the low-temperature sintering process[J].Journal of the European Ceramic Society,2008(15):2969-2973. |
| [7] | Y.B. KHOLLAM;S.B. DESHPANDE;U.S. POTDAR .Simple oxalate precursor route for the preparation of barium-strontium titanate: Ba_(1-x)Sr_xTiO_3 powders[J].Materials Characterization,2005(1):63-74. |
| [8] | Wu D.;Ling HQ.;Yin XB.;Ge CZ.;Wang M.;Ming NB.;Li AD. .Preparation of (Ba0.5Sr0.5) TiO3 thin films by sol-gel method with rapid thermal annealing[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2000(4):309-314. |
| [9] | 杨忠波,常爱民,赵青,孙永欣,刘力,文彬.纳米晶钛酸锶钡（Ba0.5Sr0.5TiO3）粉体的微波水热合成[J].材料科学与工程学报,2006(04):578-581. |
| [10] | Brankovic, G;Brankovic, Z;Goes, MS;Paiva-Santos, CO;Cilense, M;Varela, JA;Longo, E .Barium strontium titanate powders prepared by spray pyrolysis[J].Materials Science & Engineering. B, Solid-State Materials for Advanced Technology,2005(2):140-144. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%