A coprecipitation technique to prepare Sr0.5Ba0.5Nb2O6

Bulletin of materials science

A Vadivel Murugan¹  A B Gaikwad³  V Ravi²  V Samuel² 

[1] Department of Information Technology, Centre for Materials for Electronics Technology (C-MET), Pune 411 008, India$$Department of Information Technology, Centre for Materials for Electronics Technology (C-MET), Pune 411 008, IndiaDepartment of Information Technology, Centre for Materials for Electronics Technology (C-MET), Pune 411 008, India$$;Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, IndiaPhysical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$;Centre for Materials Characterization, National Chemical Laboratory, Pune 411 008, India$$Centre for Materials Characterization, National Chemical Laboratory, Pune 411 008, IndiaCentre for Materials Characterization, National Chemical Laboratory, Pune 411 008, India$$

关键词: Ceramics;    oxides;    electron microscopy;    X-ray diffraction;    ferroelectricity.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

An aqueous mixture of ammonium oxalate and ammonium hydroxide was used to coprecipitate barium and strontium ions as oxalates and niobium ions as hydroxide under basic conditions. This precursor on calcining at 750°C yielded Sr_0.5Ba_0.5Nb₂O₆ phase. This is a much lower temperature than that prepared by traditional solid state method (1000°C) as reported for the formation of Sr_0.5Ba_0.5Nb₂O₆ (SBN). Transmission electron microscopic (TEM) investigations revealed that the average particle size was 80 nm for the calcined powders. The room temperature dielectric constant at 1 kHz was found to be 1100. The ferroelectric hysteresis loop parameters of these samples were also studied.

【 授权许可】

Unknown