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Book Synthesis of Ultra Fine Barium Strontium Titanate Powder Using a Non transferred Arc Thermal Plasma Reactor

Download or read book Synthesis of Ultra Fine Barium Strontium Titanate Powder Using a Non transferred Arc Thermal Plasma Reactor written by Ana Maria Vera Arcetti and published by . This book was released on 1999 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book EPD Congress 2003

Download or read book EPD Congress 2003 written by M. E. Schlesinger and published by . This book was released on 2003 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14th edition in the EPD Congress series, this volume is concerned with environmental issues, reflecting the increased significance of this facet of metals production and processing. A centerpiece of this volume is the proceedings on mercury management in metals production and recycling, an area in which the breadth of expertise within TMS provides a unique opportunity for comprehensive examination of the topic.

Book Hydrothermal Synthesis of Barium Strontium Titanate bst Powders and Continuous and Patterned Thin Films

Download or read book Hydrothermal Synthesis of Barium Strontium Titanate bst Powders and Continuous and Patterned Thin Films written by Xuezheng Wei and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Barium strontium titanate (BST) solid-solution oxides represent an important class of ferroelectric materials due to their high dielectric constants, composition dependent Curie temperature, and potential applications in dynamic random access memory (DRAM). Hydrothermal technique is a new low-temperature (

Book Energy Conservative Production for Thermoelectric Strontium Titanate

Download or read book Energy Conservative Production for Thermoelectric Strontium Titanate written by Kikuchi Asami and published by LAP Lambert Academic Publishing. This book was released on 2015-01-09 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book proposes the production methods of thermoelectric strontium titanate which enable efficient use of energy resources. Key technology used in whole this book is combustion synthesis and also, spark plasma sintering was applied in Chapters 2 and 3. In Chapter 1, a introduction is given. In Chapters 2 and 3, the effects of operating conditions of spark plasma sintering were investigated. Spark plasma sintering successfully led the improvement of merit of lanthanum-doped strontium titanate since grain growth were effectively suppressed and oxygen defects can be introduced at the same time, which resulted in the low thermal conductivity and good electronic properties. In Chapter 4, new combustion route of strontium titanate was described. Powders of titan, titan dioxide, and strontium dioxide were used as raw materials, and the reaction mechanism were investigated. As a result, the oxidation of titan powders was found to trigger the reaction and the apparent activation energy of the reaction was calculated and the obtained results suggest a new route to produce commercially available highly dense ceramics.

Book Strontium Titanate

Download or read book Strontium Titanate written by Oleksandr Tkach and published by . This book was released on 2019 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strontium titanate (STO) is a classical high-permittivity perovskite material known since the 1940s. Although incipient ferroelectric behaviour of SrTiO3 was thoroughly studied during several decades, many new physical phenomena in STO and its solid solutions have been predicted theoretically and observed experimentally in past few years. The obtained results were successfully applied for the development of modern electronic devices on the basis of macroscopic and nanostructured samples. Besides the incipient ferroelectricity, properties of STO include a structural phase transition, semiconductivity, superconductivity, and thermoelectricity, among others. This book provides the latest information on the developments of field preparation, characterization, and application of STO and the materials based on it, with perspectives on future research. It collects the contributions of several established researchers from around the world on the fundamental mechanisms, processing, and possible uses for STO-based materials in the form of single crystals, thin films, and ceramics. This book covers a broad range of topics related to STO and materials based on it, including an overview of lattice dynamics and magnetic resonance characterization, Sr/Ti ratio, and stress induced modification of the properties, modelling, and simulation of improper ferroelectricity and multiferroic phases, dielectric responses and thermoelectric performance for tunable devices, and energy harvesting applications, respectively.

Book Hydrothermal Processing of Barium Strontium Titanate Composites on Printed Circuit Board for Thin Film Varactor Applications

Download or read book Hydrothermal Processing of Barium Strontium Titanate Composites on Printed Circuit Board for Thin Film Varactor Applications written by and published by . This book was released on 2014 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin film Ba0.7Sr0.3TiO3 has been deposited onto printed circuit boards at low temperatures for low and high frequency applications. The fabrication method involves spin coating sol-gel composites (a mixture of BST powder suspended in an amorphous BST sol), and treating the resultant films at 175°C. The treatment is done in an 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 higher dielectric constant. Three different types of powders have been explored for the composite. They are low-temperature derived, ceramic derived, and sol-gel derived powder. Low-temperature derived powders are the smallest in size, in the nanometer range. Due to such small sizes, the ferroelectric properties are lost, leading to no tunability and very low dielectric constant. The permittivity ranges from 30 to 55. Sol-gel derived powders are very reactive to the hydrothermal process. The resultant film permittivity is the highest, ranging from 200 to 260, but with a limited tunability of 1%. Ceramic derived powders are compatible with the process. The permittivity is less than that of sol-gel derived, with values from 130 to 140, but the tunability ranges from 4 to 8% at low frequencies (500 kHz to 20 MHz). For high frequency characterization (45 MHz to 1.15 GHz), films containing ceramic derived powder are deposited onto grounded coplanar waveguide capacitors. The dielectric constant significantly reduced, reaching as low as 18, but tunability increased to 18%.

Book The Synthesis of Nano Titania Particles Using a DC Transferred Arc Plasma Reactor

Download or read book The Synthesis of Nano Titania Particles Using a DC Transferred Arc Plasma Reactor written by Xiaohong Liao and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Synthesis of Nano Titanium Dioxide Particles Using a DC Transferred Arc Plasma Reactor

Download or read book The Synthesis of Nano Titanium Dioxide Particles Using a DC Transferred Arc Plasma Reactor written by Xiaohong Liao and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Characterization of Barium Titanate and Strontium Titanate Nanoparticles Synthesized by Hydrothermal and Molten Salt Methods

Download or read book Characterization of Barium Titanate and Strontium Titanate Nanoparticles Synthesized by Hydrothermal and Molten Salt Methods written by Jin Zhou and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis mainly focused on investigating the suitable synthesis methods to get barium titanate (BaTiO3) and strontium titanate (SrTiO3) nanocubes without using any capping agents. Two synthesis methods (hydrothermal and molten-salt) were used to synthesize BaTiO3 and SrTiO3 nanoparticles. X-ray diffraction (XRD) was used to identify phases and determine the phase purity of synthesized BaTiO3 and SrTiO3 nanoparticles. The morphology and formation mechanisms were investigated through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was verified that BaTiO3 nanocubes can be successfully synthesized by molten-salt method, while SrTiO3 nanocubes were obtained by hydrothermal method. The synthesized nanocubes for both materials have high crystallinity and high purity. The formation mechanism of BaTiO3 nanocubes was proposed due to the low surface energy of {100} crystal planes. Crystal planes with low surface energy are preferred in the crystal growth stage. The formation of SrTiO3 nanocubes was proposed due to the crystal growth of {100} crystal planes and face-to-face attachment. These mechanisms provided clear explanations for the formation of BaTiO3 and SrTiO3 nanocubes without using any capping agents, which can be applied to other metal oxide nanocubes. Future studies can be focused on the synthesis of other metal oxide nanocubes by using the formation mechanisms proposed in this thesis.

Book The Synthesis of Nano TiO2 Particles Using a DC Transferred Arc Plasma Reactor

Download or read book The Synthesis of Nano TiO2 Particles Using a DC Transferred Arc Plasma Reactor written by Xiaohong Liao and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of quench conditions on the properties of titanium dioxide produced using atransferred arc process was studied. Rutile phase TiO2 in the form of micron sized powder wasdecomposed and vaporized in a continuous feed DC transferred arc system. The hot gas streamexiting the reactor contained a mixture of the decomposition products of titania includingtitanium suboxides (TiO, Ti2O3), argon (Ar), and oxygen (O2). Rapid quenching of this gasstream with dry air resulted in the production of a titania aerosol. Collection of the product tookplace in the filtration system. The quench conditions studied included pre-quenchtemperature, T1, quench rate, Rq, residence time, tau, and operating power, Ptorch . Thecharacterization of particles includes phase identification, phase content calculation, sizedistribution analysis, elemental composition analysis, and morphology examination. The range of quench conditions studied were as follows, 1300

Book Growth and Characterization of Barium Strontium Titanate Thin Films with Enhanced Electrical Properties Using Pulsed Laser Deposition

Download or read book Growth and Characterization of Barium Strontium Titanate Thin Films with Enhanced Electrical Properties Using Pulsed Laser Deposition written by Anuranjan Srivastava and published by . This book was released on 1999 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Processing Science of Barium Titanate

Download or read book Processing Science of Barium Titanate written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Barium titanate and barium strontium titanate thin films were deposited on base metal foils via chemical solution deposition and radio frequency magnetron sputtering. The films were processed at elevated temperatures for densification and crystallization. Two unifying research goals underpin all experiments: 1) To improve our fundamental understanding of complex oxide processing science, and 2) to translate those improvements into materials with superior structural and electrical properties. The relationships linking dielectric response, grain size, and thermal budget for sputtered barium strontium titanate were illustrated. (Ba0.6Sr0.4)TiO3 films were sputtered on nickel foils at temperatures ranging between 100-400 Ã'°C. After the top electrode deposition, the films were co-fired at 900 Ã'°C for densification and crystallization. The dielectric properties were observed to improve with increasing sputter temperature reaching a permittivity of 1800, a tunability of 10:1, and a loss tangent of less than 0.015 for the sample sputtered at 400 Ã'°C. The data can be understood using a brick wall model incorporating a high permittivity grain interior with low permittivity grain boundary. However, this high permittivity value was achieved at a grain size of 80 nm, which is typically associated with strong suppression of the dielectric response. These results clearly show that conventional models that parameterize permittivity with crystal diameter or film thickness alone are insufficiently sophisticated. Better models are needed that incorporate the influence of microstructure and crystal structure. This thesis next explores the ability to tune microstructure and properties of chemically solution deposited BaTiO3 thin films by modulation of heat treatment thermal profiles and firing atmosphere composition. Barium titanate films were deposited on copper foils using hybrid-chelate chemistries. An in-situ gas analysis process was developed to probe the organic removal and.