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Showing 1 to 10 of 10 for “"Barium Strontium Titanate"”.
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New pyroelectric phenomena from graded ferroelectric barium strontium titanate thin films
In this study we explored the potential application of graded ferroelectric thin films in uncooled pyroelectric detectors. We built a magnetron sputter system, and developed a method of deposited compositional graded ferroelectric thin films using rf magnetron sputtering, a silicon compatible thin …
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Hydrothermal Processing of Barium Strontium Titanate Composites on Printed Circuit Board for Thin Film Varactor Applications
… autoclave in an aqueous environment comprised of barium hydroxide, strontium hydroxide, and water, and is carried out at elevated temperature and pressure. This causes the amorphous BST sol to recrystallize, forming bridges that link the BST powders together, creating a dense network, leading to a …
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Effects Of Deposition Temperature And Post Deposition Annealing On The Electrical Properties Of Barium Strontium Titanate Thin Film For Embedded Capacitor Applications
… properties of sputter deposited ferroelectric Barium Strontium Titanate (Ba0.5St0.5) TiO3 thin film capacitors. Approximately 2000A of Barium Strontium Titanate (BST) thin film was deposited at different substrate temperatures (400,450,500 and 550[degrees]C) on cleaned silicon substrates. These …
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Hydrothermal conversion of diatom frustules into barium titanate based replicas
… replicas to an aqueous basic solution containing barium hydroxide to form barium titanate and barium strontium titanate replicas. The effects of reaction temperature, time, and solution composition on extent of conversion were examined. The conventional method of converting titanium dioxide to …
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Tunable microwave filters using ferroelectric thin films
Frequency agile microwave devices based on Barium Strontium Titanate (BST) thin films have gained a lot of interest in recent years. The frequency agility of the ferroelectric devices is based on the external DC electric field controlled permittivity of BST thin film. In this research work, several …
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Microwave Overlay Capacitor Fabrication on Printed Circuit Boards
… form of parallel plate overlay capacitors, using barium strontium titanate (BST): a ferroelectric, polymer composite thick film, has been developed in this work. BST was selected due to the commercial availability of powder. This involves the use of standard air brush techniques to deposit …
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Surface and Interface Magnetism in Nanostructures and Thin Films
… and ferroelectric materials. In one case, barium hexaferrite/barium strontium titanate thin films, the anisotropic behavior of the ferromagnet is shown to change due to the introduction of the secondary material. In the other example, CrO2/Cr2O3 bilayers, exchange coupling is observed as …
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Beam-Steerable and Reconfigurable Reflectarray Antennas for High Gain Space Applications
… reflectarray elements capacitively loaded with Barium Strontium Titanate (BST) thin film are shown. The effects of substrate thickness, operating frequency and deposition pressure are shown utilizing coupling conditions and the performance is optimized. To ensure minimum affects from biasing, …
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Chemically modified Ta₂O₅ thin films for dynamic random access memory (DRAM) applications
… for future generation DRAM applications. ¹Barium strontium titanate, ²Barium bismuth tantalate
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EFFECTS OF STRAIN ON DIELECTRIC PROPERTIES OF FERROELECTRIC Ba0.5Sr0.5TiO3 FILMS
… As one of the promising ferroelectric materials, barium strontium titanate thin film, especially Ba0.5Sr0.5TiO3 (BST) films, have raises great research interests due to its high dielectric constant, which is tunable in an external electric field, combined with relative low loss at microwave …