Pyroelectric Properties of SBN/BST by Powder-Sol Method

Abstract:

0.7BaO·0.3SrO·0.3Nb₂O₅·0.7TiO₂ (SBN/BST) composite ceramics werefabricated using a Powder-Sol (P-S) method with Nb₂O₅fine powder suspended in the barium strontium titanate (abbreviated as BST) solsolution. By X-ray diffraction (XRD) investigations, it is found that thetetragonal tungsten bronze (TTB) phase and perovskite phase were co-present incompositions. The average grain size of BST and SBN phase is 140 nm and 2.2 μm,respectively. The room temperature relative dielectric constant is 1445 forthis sample measured at 1 kHz and zero bias. In the room temperature, thepyroelectric coefficient of the 0.7BaO·0.3SrO·0.3Nb₂O₅·0.7TiO₂is 39 nc/cm²·°C. The maximum value of F_D is about 2.4×10^-5 Pa^-1/2at 45°C.

• Periodical: Applied Mechanics and Materials (Volume 320)
• Pages: 190-195
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.320.190
• Online since: May 2013
• Authors: Lian Wei Shan, Wei Li, Ji Hua Wang, Zhong Li, Li Min Dong
• Keywords: Composite Ceramics, Electron Microscopy, Electronic Material, Pyroelectric Coefficient

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