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

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

Research output: Contribution to journalArticle

Abstract

Nanocomposites of 0.96(0.91Pb(Mg 1/3Nb 2/3)O 3-0.09PbTiO 3)-0.04BaTiO 3 (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., ε rt of 18,000-20,000, tan δ of 1-0.5%, specific resistivity of 10 12 Ω cm, and MOR of 125-145 MPa.

Original languageEnglish
Pages (from-to)635-641
Number of pages7
JournalMaterials Research Bulletin
Volume41
Issue number3
DOIs
Publication statusPublished - 2006 Mar 9

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Polymethyl Methacrylate
Sols
Surface treatment
Nanocomposites
nanocomposites
preparation
Powders
dielectric properties
sintering
heat treatment
microstructure
electrical resistivity
composite materials
synthesis
Dielectric properties
Sintering
Heat treatment
Temperature
Microstructure
temperature

Keywords

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

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Preparation of PMN-PT-BT/Ag nanocomposites by surface modification with MgO sol. / Han, Kyoung R.; Kim, Chang Sam; Jeong, Soonyong; Nahm, Sahn.

In: Materials Research Bulletin, Vol. 41, No. 3, 09.03.2006, p. 635-641.

Research output: Contribution to journalArticle

Han, Kyoung R. ; Kim, Chang Sam ; Jeong, Soonyong ; Nahm, Sahn. / Preparation of PMN-PT-BT/Ag nanocomposites by surface modification with MgO sol. In: Materials Research Bulletin. 2006 ; Vol. 41, No. 3. pp. 635-641.
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