Barium titanate is a very attractive perovskite given its ferroelectric, piezoelectric and dielectric properties. These can be further improved by the substitution of barium and titanium by different elements. Introducing both rare earths and/or metals in this compound enhances its optical and electrical properties, thus making it a multifunctional material suitable for many different applications. In the present work, the compound Ba_0·91Er_0·1/3Ca_0·04Ti_0·92Sn_0·08O₃ is prepared by solid state reaction and its structural, morphological, thermal optical and electrical properties are investigated in detail by X ray diffraction, scanning electron microscopy, differential scanning calorimetric, absorption spectroscopy and impedance spectroscopy respectively. Scanning electron microscopy shows that the material is composed by a major polycrystalline phase with micrometric grain size. Two-phase transitions at 448 K and 572 K are deduced from thermal and electrical measurements. The optical measurements indicate that both erbium and tin are well introduced in the structure, which is confirmed by energy dispersive spectroscopy, and affects the vibrational modes. a. c. and d. c. electrical measurements show that, depending on the measurement temperature range, conduction mechanism is either a non-overlapping small polaron tunneling or a correlated barrier hopping model. . Moreover, dielectric measurements prove a high dielectric constant and identify a phase transition from the ferroelectric phase to paraelectric one which is in agreement with literature. Such substitution improves the compound properties and makes it suitable for different devices.

钛酸钡具有铁电，压电和介电特性，因此是非常有吸引力的钙钛矿。这些可以通过用不同元素取代钡和钛来进一步改善。在该化合物中同时引入稀土和/或金属可增强其光学和电学性能，从而使其成为适合许多不同应用的多功能材料。在本工作中，化合物Ba _0·91 Er _0·1/3 Ca _0·04 Ti _0·92 Sn _0·08 O ₃该化合物是通过固态反应制备的，其结构，形态，热光学和电学性质分别通过X射线衍射，扫描电子显微镜，差示扫描量热法，吸收光谱和阻抗光谱进行了详细研究。扫描电子显微镜显示该材料由具有微米级晶粒尺寸的主要多晶相组成。从热和电测量推导出448 K和572 K处的两相转变。光学测量表明，and和锡均已很好地引入结构中，这已通过能量色散光谱法得到证实，并会影响振动模式。交流和直流电测量表明，根据测量温度范围，传导机制是非重叠的小极化子隧穿或相关的势垒跳跃模型。。而且，介电测量证明了高介电常数，并确定了从铁电相到顺电相的相变，这与文献一致。这种取代改善了化合物的性能，并使其适用于不同的器件。