Characterisation And Dielectric Property Analysis  of A-site Doped LaTiO3-δ Perovskites Synthesised by Ball Milling Method

Bradha Madhavan, Anuradha Ashok*

Nanotech Research Facility, PSG Institute of Advanced Studies, Coimbatore 641 004, India

Adv. Mater. Lett., 2015, 6 (5), pp 395-401

DOI: 10.5185/amlett.2015.5827

Publication Date (Web): May 05, 2015



The present work highlights a series of perovskites La0.8A0.2TiO3-δ, (where A= Ba, Ca, Sr), which includes a high dielectric constant, a low dielectric loss over a wide temperature, in a frequency range of 30 MHZ. Undoped and A-site doped LaTiO3-δ (with Ba2+, Sr2+ and Ca2+) perovskites were synthesised by solid state reaction method (ball milling). The perovskite phase formation of the milled precursor powders under thermal treatments was investigated by thermogravimetry/differential scanning calorimetry (TG/DSC). Structural analysis of the phase pure sintered pellets revealed an orthorhombic crystal structure for all perovskites. Surface morphology of the sintered pellets exposed the presence of nanosized grains. The oxidation states of La3+ and Ti3+ ions have been confirmed using X-ray Photoelectron Spectroscopy (XPS). The dielectric spectral analysis reveals that dielectric properties of the perovskites depend on temperature and frequency. Among the dopants Sr is found to be the most effective in increasing the dielectric properties of LaTiO3-δ. This makes it suitable as a high dielectric material for making capacitors operating at higher frequencies.


Powders solid state reaction, electron microscopy, dielectric properties, perovskites.

Current Issue

Advanced Materials Congress Celebrating 10th Years of Establishment

Secure Management of Networked Batteries for Building Integrated Photovoltaics (BIPV) Systems  

The Cause of 100-year Low Carbonated Concrete of the Bridge 

Organic Montmorillonite Intercalated Nano-composites Prevent Post-Surgical Associated Infections

Morphology/tensile Performance Relationship for LLDPE/PP Double Gated Injected Blends

Preparation and Characterization of Nickel Ferrite Nanoparticles via Sol-gel Method

Nitrogen-doped Diamond Nanowire Gas Sensor for the Detection of Methane

Manufacture of Functional Open-cell Al Foams with Recycled Al Scraps using NaCl Ball Space Holder 

Vilsmeier-Haack Transformations under Non Classical Conditions

New Application of Highly Vesicular Basalt from Jabel Isbil Volcano (Dhamar-Rada'a Volcanic Field), Yemen

An Assessment of Tribological Characteristics under different Operating Condition

Functional Bi Coatings as A Perspective Material for Radiation Shields Production against Electron Radiation

Effects of Silica Modified NiFe2O4 on the Dielectric and Electrical Properties of NiFe2O4 filled Poly (methyl methacrylate) Composites

Previous issues
The Journey of a Decade to Advancing Materials Are the Electrospun Polymers Polymeric Fibers? Mechanical and Thermal Properties of Composite Material and Insulation for a Single Walled Tank for Cryogenic Liquids Prediction of Long-Term Behavior for Dynamically Loaded TPU Investigation of Doped Titanium Dioxide in Anatase Phase. Study ab initio using Density Functional Theory Comparison between Single Al2O3 or HfO2 Single Dielectric Layers and their Nanolaminated Systems Preparation of Stable and Optimized Antibody-gold Nanoparticle Conjugates for Point of Care Test Immunoassays Resonance-Based Temperature Sensors using a Wafer Level Vacuum Packaged SOI MEMS Process Integrated System Based on the Hall Sensors Incorporating Compensation of the Distortions The Efficacy of Cinnamomum Tamala as a Potential Antimicrobial Substance against the Multi-Drug Resistant Enterococcus Faecalis from Clinical Isolates The Effect of Complexing Reagent on Structural, Electrical and Optical Properties of CuS Thin Film Laser Cladding of Fluorapatite Nanopowders on Ti6Al4V Preparation and Evaluation of Sulfonate Polyethylene Glycol Borate Ester as a Modifier of Functional Properties of Complex Petroleum Lithium Grease

Upcoming Congress

Knowledge Experience at Sea TM