Synthesis of SmAlO3 by polymeric precursor method and its microwave dielectric properties

Jia Mao Li, Tai Qiu, Chuan Gang Fan, Peng Xu

Research output: Contribution to journalArticlepeer-review

Abstract

SmAlO3 microwave dielectric ceramic powder was successfully synthesized by the polymeric precursor method using EDTA as a chelating agent. The polymeric decomposition mechanism of the precursor, the formation process of SmAlO3 and the properties of the particles were characterized. The results show that the dried gel including EG addition is decomposed completely up to 550°C and single SmAlO3 phase with orthorhombic perovskite structure is found when the calcining temperature is increased to 800°C. Compared with the conventional solid-state reaction route, the synthesis temperature is sharply decreased from 1400 to 800°C. With the average particle size of about 30 nm, the particles of the as-synthesized powder are uniform and spherical. Using the as-synthesized powder as raw material, the sample sintered at 1550°C for 2 h possesses the highest relative density of 97.5% and exhibits excellent microwave dielectric properties of relative permittivity εr=21, quality factor Qf=77400 GHz and temperature coefficient of resonant frequency τf=-73.2×10-6°C-1.

Original languageEnglish
Pages (from-to)851-856
Number of pages6
JournalGuocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering
Volume11
Issue number5
StatePublished - Oct 2011

Keywords

  • Ethylene glycol
  • Ethylenediaminetetraacetic acid
  • Microwave dielectric property
  • Polymeric precursor method
  • Sinterability
  • SmAlO

Fingerprint

Dive into the research topics of 'Synthesis of SmAlO3 by polymeric precursor method and its microwave dielectric properties'. Together they form a unique fingerprint.

Cite this