How to Improve Properties of Functional Films by Sol–Gel Technique

Preparation and some properties of pure and doped barium titanate thin films

“…It however, possesses two undesirable characteristics, namely decreased insulation resistance (degradation) under high dc voltage stresses at temperatures in excess of the Curie point of 120 o C and a high temperature coefficient of capacitance near the Curie point. Numerous studies on the effect of various modifiers on the dielectric and structural properties of barium titanate have been reported [1,4]. Barium titanate doped lightly with trivalent rear earth ions acts as a semiconductor.…”

“…Doping with higher levels of rare-earth also yields stabilized titanates suitable for capacitor dielectrics. Previous studies by our laboratory had been reported that crackfree and polycrystalline BaTiO 3 thin films could be synthesized as a good ferroelectric by high-concentration sol-gel method and gel-aging process on substrate [1][2][3]. In the present work, semiconductor property of BaTiO 3 thin films prepared by the newly developed method is discussed.…”

“…BaTiO 3 ceramics have been found for extensive applications in electric and electronic devices due to its excellent optical and electrical properties [1][2][3]. Because of the intrinsic capability of the perovskite structure to host ions of different size, a large number of different dopants can be accommodated in the lattice.…”