Work

Synthesis of Strontium Titanate Nanoparticles by Ultrasonic Irradiation

Year: 2014

Type: article

Abstract: The SrTiO3is a ceramic with thermoelectric properties, i.e., it can generate electrical voltage between its terminals when subjected to a temperature gradient, and this behavior is known as Seebeck effect. One parameter for quantifying the efficiency of converting thermal energy into electric energy is through the value of the Figure of Merit (ZT). STO nanostructured powders were synthesized by ultrasonic irradiation (USS), and the effects of USS in STO synthesis were evaluate, and it was compared with the conventional route of solid-state reaction (SSR). USS powders were produced by solubilization of Ti (C4H9O)4and SrCO3in acid solution and following the posterior precipitation by adding NH4OH solution. After drying process, the precipitated was added to a KOH solution and was subjected to ultrasonic irradiation to promote the STO formation. DRX analysis revealed that from USS method it was possible to obtain exclusive STO phase. SEM characterization showed that the USS powder presented particle size about 100nm, which was much lower than that obtained by SSR, about 250nm.

Source: Materials science forum

DOI: 10.4028/www.scientific.net/msf.798-799.703

Authors: André Silva Chaves, Olívia de Andrade Raponi, Maria Virginia Gelfuso, Daniel Thomazini

Institution: Universidade Federal de Itajubá

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Amparo à Pesquisa do Estado de Minas Gerais