The role of anisotropic misfit strains on the spontaneous polarization, dielectric properties, and pyroelectric response of 110 oriented Ba0.6Sr0.4TiO3 BST 60/40 thin films on 100 orthorhombic substrates is analyzed theoretically. The anisotropic in-plane strain state and the rotation of the elastic and the electrostrictive constants of the BST 60/40 films result in strongly directional and uni...

Gamma-irradiation effects in single-crystalline barium titanate " (1968). Retrospective Theses and Dissertations. Paper 3480. 1968 Signature was redacted for privacy.

In this work, a broad overview in the field of strontium titanate (ST, SrTiO3)-, barium (BT, BaTiO3)- and (BST, BaSrTiO3)-based gas sensors is presented discussed. The above-mentioned materials are characterized by perovskite structure with long-term stability therefore very promising for commercial gas-sensing applications. Within last 20 years, number papers where ST, BT BST were tested as ga...

Nonlinear transmission lines (NLTLs) offer compact, low-cost, all solid-state high-power microwave (HPM) generation. This article experimentally investigates the RF output power for composite-based 10, 25, and 50 Ω NLTLs used as a combined pulse forming line HPM source. We manufactured coaxial containing 10% barium strontium titanate 15% nickel zinc ferrite encased in polydimethylsiloxane. The ...

Ferroelectric thin films are currently being used to develop tunable microwave circuits based on the electric-field dependence of the dielectric constant. (Ba0.5Sr0.5)TiO3 ~BST! films prepared by sputtering on Pt/TiO2 /SiO2 /Si substrates are found to exhibit a capacitance change ~tunability! of nearly 4:1. Higher tunability has been attributed to the ~100! texturing of the BST films and is a r...

The adsorption of barium ions on barium titanate in an aqueous solution was studied by means of batch technique as a function of Ba(II) concentration, temperature and solution pH using Ba-140 as radiotracer. The results show that adsorption is essentially complete in ca 180min and the steady state values of adsorption at various concentrations agree well with the classical Freundlich isotherm a...

A nonlinear thermodynamic model is used to investigate the influence of thermal stresses on the room temperature RT pyroelectric properties of 001 -textured polycrystalline barium strontium titanate BaxSr1−xTiO3, BST films with four different compositions on three integrated circuit-friendly substrates: Si, 0001 and 1̄1̄20 sapphire. It is found that the in-plane tensile thermal strain in BST incr...

Atriblock copolymerof polystyrene-polybutadiene-polystyrene (KratonD1102)hasbeenused topattern barium titanate precursor with nanoscale modulations. The copolymer self-assembles to yield cylindrical polystyrene nanodomains in a polybutadiene matrix. The preorganized thin films of polymer are then selectively OH-functionalized in situ on the unsaturated carbon bonds in the polybutadiene matrix w...

Strontium titanate (SrTiO(3)) nanoparticles with well defined cubic shape and sub-10 nm size that are highly dispersible in non-polar organic solvents were successfully synthesized by hydrothermal (HT) processing. Water-soluble titanium complexes and strontium hydroxide were employed as precursors. When the HT process was carried out without oleic acid, the SrTiO(3) particles obtained were rela...