Sintering and microstructure of BaTiO3 nano particles synthesized by molten salt method

Chang Hyun Lee, Hyo Soon Shin, Dong Hun Yeo, Gook Hyun Ha, Sahn Nahm

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In order to establish thinner dielectric layers in thick film electronic components such as MLCC (Multilayer ceramic capacitor), BaTiO3 nanoparticles have been utilized. However, studies on the synthesis of nanoparticles smaller than 20 nm, the characteristics of the BaTiO3 powder, and the powder's sintering are lacking. Therefore, this paper aims to synthesize BaTiO3 particles smaller than 20 nm by using the molten salt method and evaluate the microstructure and dielectric properties by varying the sintering temperature from 750°C to 1200°C. Through the molten salt method and by using KOH-KCI mixed salt, 20 nm BaTiO3 powder was synthesized at a low temperature of 150°C. Sintering the pellets formed from the synthesized 20 nm BaTiO3 nano powder led to the observation of an unusual phenomenon where the particles grew to approximate sizes below 850°C where densification progressed. At sintering temperatures above 950°C, particles that expanded into rod shapes were observed and these particles were identified to be unreacted TiO2 based on the results of the EDX (Energy Dispersive X-ray Spectroscopy) analysis and phase analysis results.

Original languageEnglish
Pages (from-to)5233-5238
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume16
Issue number5
DOIs
Publication statusPublished - 2016 May 1

Keywords

  • Molten Salt
  • Nano BaTiO
  • Sintering

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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