barium titanate invention

  • Barium Titanate - an overview | ScienceDirect Topics

    Invention discloses method of barium titanate synthesis. 2 The invention uses a hydrothermal synthesis for preparing barium titanate for a multi-layer ceramic capacitors. The barium titanate of invention has high purity, particle size of submicron size,

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  • Barium titanate - Wikipedia

    Barium titanate (BTO) is an inorganic compound with chemical formula BaTiO 3.Barium titanate appears white as a powder and is transparent when prepared as large crystals. It is a ferroelectric ceramic material that exhibits the photorefractive effect and piezoelectric properties. It is used in capacitors, electromechanical transducers and nonlinear optics

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  • US4832939A - Barium titanate based dielectric compositions ...

    The present invention involves a method for producing a variety of barium titanate based powder products consisting of submicron, dispersible primary particles having narrow size distributions. The method, in its broadest aspects, involves heating an aqueous slurry of PbO, or Pb(OH) 2 , and Ca(OH) 2 with a stoichiometric excess of the hydrous oxides of Ti(IV), Sn(IV), Zr(IV) and Hf(IV) to a ...

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  • Method for preparing barium-titanate based powder - Patent ...

    Aug 14, 2001 · The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C 2 O 4 ) 2 .4H 2 O) with spraying a mixture of an aqueous barium chloride (BaCl 2 .2H 2 O) and titanium tetrachloride (TiCl 4 )

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  • Barium Titanate - an overview | ScienceDirect Topics

    Barium titanate (BaTiO 3) is the most well-known lead-free FE material with the highest ECE strength (ΔT/ΔE) due to the first-order FE–PE phase transition. The adiabatic temperature change of the pure BaTiO 3 FE ceramics can reach 1.10K under 30 kV/cm. 26 However, the very narrow temperature window (less than 10K) and the high Curie ...

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  • US5783165A - Method of making barium titanate - Google Patents

    The present invention provides a new and improved method of making barium titanate powder. The method includes the steps of providing a solution comprising oxalic acid and titanium oxychloride, maintaining the solution at a predetermined temperature, adding barium carbonate to the solution thereby precipitating barium titanyl oxalate, and calcining the barium titanyl oxalate so as to provide ...

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  • US2777773A - Barium titanate of increased dielectric ...

    US2777773A - Barium titanate of increased dielectric constant and piezoelectric response and method of producing same - Google Patents

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  • US20040115122A1 - Method for preparing high quality barium ...

    The present invention relates to a method for preparing high quality barium titanate powder by precipitating barium titanyl oxalate with spraying a mixture of an aqueous barium chloride and titanium tetrachloride (TiCl 4 ) to an aqueous solution of oxalic acid via a nozzle in high speed, which exhibits improved yield with shortened reaction time and optimized stoichiometric mole ratio of ...

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  • Method of making barium titanate - Ferro Corporation

    The present invention provides a new and improved method of making barium titanate powder. The method includes the steps of providing a solution comprising oxalic acid and titanium oxychloride, maintaining the solution at a predetermined temperature, adding barium carbonate to the solution thereby precipitating barium titanyl oxalate, and calcining the barium titanyl oxalate so as to provide ...

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  • US3002861A - Method of producing a coating of barium ...

    barium barium titanate titanium film coating Prior art date 1957-06-07 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US664443A Inventor Lydia A Suchoff Original ...

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  • Barium Titanate - an overview | ScienceDirect Topics

    Invention discloses method of barium titanate synthesis. 2 The invention uses a hydrothermal synthesis for preparing barium titanate for a multi-layer ceramic capacitors. The barium titanate of invention has high purity, particle size of submicron size,

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  • Barium titanate - Wikipedia

    Barium titanate (BTO) is an inorganic compound with chemical formula BaTiO 3.Barium titanate appears white as a powder and is transparent when prepared as large crystals. It is a ferroelectric ceramic material that exhibits the photorefractive effect and piezoelectric properties. It is used in capacitors, electromechanical transducers and nonlinear optics

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  • Barium Titanate - an overview | ScienceDirect Topics

    Barium titanate. Barium titanate is the inorganic compound with the chemical formula BaTiO 3.Barium titanate is a white powder and transparent as larger crystals (Veith et al., 2000).This titanate is a ferroelectric ceramic material, with photorefractive effect and piezoelectric properties.

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  • Barium Titanate, Method of Making and Capacitor thereof ...

    Aug 31, 2004 · Barium Titanate, Method of Making and Capacitor thereof. Cite. Download. Patent: KR-20070050973-A: Inventor: SHIRAKAWA AKIHIKO (JP) YOKOUCHI HITOSHI (JP) Assignee: SHOWA DENKO KK (JP) Date: Priority .

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  • Method for preparing barium-titanate based powder - Patent ...

    Aug 14, 2001 · The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C 2 O 4 ) 2 .4H 2 O) with spraying a mixture of an aqueous barium chloride (BaCl 2 .2H 2 O) and titanium tetrachloride (TiCl 4 )

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  • Richard Weir & Carl Nelson: Barium-Titanate Ultra-Capacitor

    Yet another aspect of the present invention is that the coating of aluminum oxide and calcium magnesium aluminosilicate glass on calcined composition-modified barium titanate powder provides many enhancement features and manufacturing capabilities to the basis material.

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  • Suk-Joong L. Kang Inventions, Patents and Patent ...

    Mar 24, 2010 · Abstract: The invention relates to a method for growing single crystals of barium titanate [BaTiO3] and barium titanate solid solutions [(BaxM1-x)(TiyN1-y)O3]. This invention is directed to a method for growing single crystals of barium titanate or barium titanate solid solutions showing the primary and secondary abnormal grain growths with increasing temperature

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  • Barium - Wikipedia

    Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal.Because of its high chemical reactivity, barium is never found in nature as a free element.. The most common minerals of barium are baryte (barium sulfate, BaSO 4) and witherite (barium carbonate, BaCO 3).The name barium originates from the ...

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  • Titanates | AMERICAN ELEMENTS

    Titanates are compounds containing titanium, oxygen, and at least one additional metallic element.Some of the most common titanates are strontium titanate, barium titanate, calcium titanate, and dysprosium titanate. Strontium titanate, at room temperature, is a centrosymmetric paraelectric material with a perovskite structure.However, at low temperatures it nears a ferroelectric phase ...

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  • Kazumi Kato Inventions, Patents and Patent Applications ...

    Oct 07, 2015 · Abstract: A manufacturing method of a barium zirconate titanate nanocrystal is provided. The manufacturing method of a barium zirconate titanate nanocrystal according to the present invention includes mixing a barium hydroxide aqueous solution, an aqueous solution of a water-soluble titanium complex, an aqueous solution of a water-soluble zirconium complex, a sodium hydroxide

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  • Disruptive Inventions in Electroceramics

    The dielectric constant and loss of barium titanate and barium-strontium titanate have been measured at biasing field strengths from 0 to 5 megavolts per meter, at temperatures from -50°C to +135 ...

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  • New solar cells produces a thousand times more power

    Oct 13, 2021 · Yeseul Yun, a PhD student at MLU and first author of the study, explains: "We embedded the barium titanate between strontium titanate and calcium titanate. This was achieved by vaporising the crystals with a high-power laser and redepositing them on carrier substrates. This produced a material made of 500 layers that is about 200 nanometres thick."

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  • Disruptive Inventions in Electroceramics | Scientific.Net

    Disruptive inventions in electroceramics arose out of need for greatly improved properties or short-supply of existing materials, or, more importantly, serenpedity. In the case of ceramic capacitors, the key property of the material, dielectric constant, jumped from less than 10 (mica) to 100 (titania) to over 1000 (barium titanate ceramics) to over 10,000 (relaxor ferroelectrics) to over ...

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  • Process for preparing barium titanate - 百度学术

    Aug 06, 2008 · According to barium titanate prepared by the present invention under reducing conditions, and the crystalline hydrated titanic acid compound prepared by sulfuric acid of titanium dioxide and barium hydroxide as a raw material obtained by calcining the solid product of the residual material Barium sulfate is converted to sulfide produced barium ...

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  • Barium Titanate - an overview | ScienceDirect Topics

    Barium titanate, BaTiO3 [BT] [8,9], is the first-discovered ferroelectric oxide with perovskite structure. This ceramic has a relatively high electromechanical coupling factor, k33 (~0.50), and a piezoelectric strain constant, d33 (~190 pC/N), and has been partially

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  • High Purity Barium Titanate Market Size 2021 Industry ...

    Dec 14, 2021 · Press Release High Purity Barium Titanate Market Size 2021 Industry Share, Recent Trends, Growth Opportunities, Business Boosting Strategies, Covid-19 Impact Analysis, Development Challenges, Top ...

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  • Method for producing perovskite-type barium titanate ...

    Method for producing perovskite-type barium titanate powder - Patent JP-6573653-B2 - PubChem. National Center for Biotechnology Information. 8600 Rockville Pike, Bethesda, MD, 20894 USA. Contact. Policies. FOIA. National Library of Medicine. National Institutes of Health.

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  • Hideyuki Osuzu Inventions, Patents and Patent Applications ...

    Abstract: The dielectric layers are formed from a dielectric porcelain formed from crystal particles containing barium titanate as a main component and containing a rare earth element, and the crystal particles have, in a particle boundary vicinity, a low concentration region in which the concentration of the rare earth element is lower than the concentration of the rare earth element in an ...

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  • Ho Yong Lee Inventions, Patents and Patent Applications ...

    Apr 16, 2020 · Abstract: The invention relates to a method for growing single crystals of barium titanate [BaTiO3] and barium titanate solid solutions [(BaxM1−x)(TiyN1−y)O3]. This invention is directed to a method for growing single crystals of barium titanate or barium titanate solid solutions showing the primary and secondary ...

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  • Process for preparing barium titanate - 百度学术

    Aug 06, 2008 · According to barium titanate prepared by the present invention under reducing conditions, and the crystalline hydrated titanic acid compound prepared by sulfuric acid of titanium dioxide and barium hydroxide as a raw material obtained by calcining the solid product of the residual material Barium sulfate is converted to sulfide produced barium ...

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  • History of Piezoelectricity | PIEZO.COM

    Development of the barium titanate family of piezoceramics and later the lead zirconate titanate family. ... established as the Barium Titanate Application Research Committee, in 1951. ... slow, even declining. Globally, however, there was still much pioneering research work taking place as well as device invention and patenting. CHAPTER 6.

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  • Brief History of Ceramics and Glass - The American Ceramic ...

    Ceramic capacitors based on barium titanate are developed. 1960s: Alumina insulators for voltages over 220 kV are introduced and applications for carbides and nitrides are developed. The first yttria-based transparent ceramic is invented. Bioglass is also discovered. 1970s: Partially stabilized zirconia is

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  • Barium - Wikipedia

    Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal.Because of its high chemical reactivity, barium is never found in nature as a free element.. The most common minerals of barium are baryte (barium sulfate, BaSO 4) and witherite (barium carbonate, BaCO 3).The name barium originates from the ...

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  • Anomalous structure transition in undercooled melt ...

    Mar 02, 2021 · Here, we show when and how polymorphic selection occurs during the crystallization of barium titanate (BaTiO 3, BT) using in situ high energy synchrotron X

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  • Method of production of barium titanate

    The invention allows to raise the productivity of the barium titanate production process due to the reduced time necessary for preparation of the titanium tetrachloride and the oxalic acid source solutions.

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  • Mn–Nb co-doping in barium titanate ceramics by different ...

    1. Introduction. Barium titanate (BaTiO 3, BT), an ABO 3 type perovskite material, is a main dielectric component for multilayer ceramic capacitors (MLCCs) [].BT undergoes a series of phase transitions from a cubic paraelectric phase (c-BT) to three successive ferroelectric phases: tetragonal (t-BT), orthorhombic (o-BT), and rhombohedral (r-BT) at around 120 °C (Curie temperature, T c), 5 °C ...

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  • Historical Introduction to Capacitor Technology

    At present, more than 1012 barium titanate–based MLCC are manufactured each year. Ceramic capacitors are not limited to barium titanate MLCC. A wide range of ceramic formulations has been developed, some with very high dielectric constants but usually with large temperature/voltage coefficients, and others

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  • Novel solar cells produce a thousand times more power ...

    Jul 27, 2021 · To achieve this increase in electrical energy production, the researchers created crystalline layers of barium titanate, strontium titanate, and calcium titanate, which they placed alternately on top of one another, separating the positive and negative charges in the same photovoltaic device.

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