Preparation of (1-x)(Ba,Sr)TiO3–xMgTiO3 Based Thick Films by Inkjet Printing

(1- x )(Ba 0.6 Sr 0.4 )TiO 3 – x MgTiO 3 ( x =0–0.01) thick film patterns were prepared by the inkjet method. The dielectric properties and tunabilities of the thick films were examined. The Curie temperature was shifted to a lower temperature by adding MgTiO 3 . The value of tan δ was improved by adding a small amount of MgTiO 3 . In order to improve the electric properties of the thick films, the effects of adding SiO 2 to 0.995(Ba 0.6 Sr 0.4 )TiO 3 –0.005MgTiO 3 thick films were investigated. The dielectric constant without DC electric field and the tunability at 10 V/µm DC electric field were approximately 2300 and 70%, respectively, when 0.5 wt % SiO 2 was added to the thick films. When the amount of SiO 2 added was too large, the Ba 2 TiSi 2 O 8 phase appeared and the electric properties deteriorated. These results indicate that the MgTiO 3 solute and the addition of SiO 2 were effective for improving the electric properties of the thick films prepared by the inkjet method.