Preparation of PMN-PT-BT/Ag nanocomposites by surface modification with MgO sol

Kyoung R. Han, Chang Sam Kim, Soonyong Jeong, Nahm Sahn

Research output: Contribution to journalArticlepeer-review


Nanocomposites of 0.96(0.91Pb(Mg1/3Nb2/3)O 3-0.09PbTiO3)-0.04BaTiO3 (PBT) with Ag were prepared via synthesis of low-temperature-sinterable PBT/Ag composite powder and its surface modification with a MgO sol. Dielectric properties and modulus of rupture were investigated as a function of the amount of the MgO sol at sintering temperature in the range from 850 to 1000°C. The MgO sol seemed to suppress the diffusion and migration of Ag during the heat treatment to give rise to the homogeneous microstructure with 300-80 nm of Ag particles in about 3.5-2.5 μm grains. The proper amount of the MgO sol seemed to be 0.5-1.0 wt.% for the PBT powder with 3.0 mol% Ag. The PBT/Ag nanocomposites showed density >99% T.D., εrt of 18,000-20,000, tan δ of 1-0.5%, specific resistivity of 1012 Ω cm, and MOR of 125-145 MPa.

Original languageEnglish
Pages (from-to)635-641
Number of pages7
JournalMaterials Research Bulletin
Issue number3
Publication statusPublished - 2006 Mar 9


  • A. Ceramics
  • A. Electronic materials
  • B. Chemical synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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