Articles
  • Synthesis and characterization of strontium titanate powder via a simple polymer solution route
  • Sang-Jin Leea, Pradheep Thiyagarajanb and Man-Jong Leeb,*
  • a Department of Advanced Materials Science and Engineering, Mokpo National University, Muan 534-729, South Korea b Department of Advanced Technology Fusion, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, South Korea
Abstract
A simple chemical route has been used to synthesize highly sinterable strontium titanate (SrTiO3) powders using titanium isopropoxide, strontium nitrate and ethylene glycol. This method utilizes complexation-polymerization using ethylene glycol as an organic carrier, which leads to compositional homogeneity and fine particle sizes. The calcined SrTiO3 powder showing a porous nature was fully crystallized to a cubic phase at 1,300 oC for 1 hour. Through ball-milling the porous SrTiO3 powders with particle sizes of 200-300 nm were easily obtained, which was sintered to a bulk density of 4.8 g/cm3 at 1,400 oC for 1 h with a grain size of approximately 6.0 mm. The relative dielectric constant and loss tangent of SrTiO3 sintered at 1,400 oC for 1 hour were 2078 and 0.022, respectively.

Keywords: Strontium titanate; Titanium isopropoxide; Strontium nitrate; Ethylene glycol; Powder synthesis; Complexationpolymerization.

This Article

  • 2008; 9(4): 385-388

    Published on Aug 31, 2008

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