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mechanochemical synthesis of calcium titanate as ..

()Lead calcium titanate nanoparticles (PCT-NPs) were synthesized by themodified sol-gel method.

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Synthesis of calcium titanate from …

T1 - Synthesis of calcium copper titanate (CaCu3Ti4O12) nanowires with insulating SiO2 barrier for low loss high dielectric constant nanocomposites

Lead calcium titanate nanoparticles (PCT-NPs) were synthesized by the modified sol-gel method

The discovery of a giant dielectric constant of >105 in calcium copper titanate (CCTO) has generated significant interest for application in electronic devices. Over the past decade, many methods have been developed to synthesize CCTO particles in an effort to capitalize upon the outstanding dielectric properties. Polymer film capacitors are one application where CCTO could greatly increase the typically low dielectric constant of the polymer. Recent work has shown that the aspect ratio of the dispersed filler can greatly affect the dielectric constant of the polymer with high aspect ratio nanowires (NWs) producing greater dielectric constant and energy density than spherical particles. While CCTO NWs hold great potential to improve the properties of nanocomposite capacitors, no method currently exists for their preparation and their integration is challenged by the barrier layer capacitance which leads to high dielectric loss. Here, a novel two-step hydrothermal reaction is developed for the large-scale synthesis of CCTO NWs and an insulating barrier layer is applied to greatly reduce the loss while preserving the high dielectric constant.

Calcium copper titanate - Wikipedia

Effect of powder synthesis procedure on calcium site occupancies in barium calcium titanate: ..

(2008) Coprecipitation and Hydrothermal Synthesis of Praseodymium Doped Calcium Titanate Phosphors, in Developments in Strategic Materials: Ceramic Engineering and Science Proceedings, Volume 29, Issue 10 (eds H.-T.

Nano-crystalline barium strontium titanate, BaSrTiO, (BST) powders were synthesized by sol–gel method, and the effects of Bi-doped on the microstructure and dielectric properties of BST powders were investigated. At first, the stable BST sols with optimum molar ratio were prepared and then different precents of bismuth were doped in precursor solutions. The samples, after drying and calcination at 850°C for 2h, were characterized by TG-DTA, FTIR, XRD, FESEM and LCR meter equipments. The results showed that the crystallite size and lattice parameter changed by increasing doped Bi content of BST. Also, with increasing Bi content from 2 to 4mol%, average particle size of BSTB decreased from 40 to 35nm. The dielectric constant for all samples increased with increasing calcination temperatures and then decreased after Curie temperature. An increase in the dielectric constant was observed up to a maximum of 1040 at a temperature of 80°C for BSTB2 and 910 at 70°C for BSTB4, approximately. The maximum value of dielectric constant and dielectric loss of the Bi-doped BST ceramics decreased with increasing Bi content.

A Short Review on Copper Calcium Titanate ..

AbstractA hydrothermal synthesis method was used to prepare calcium titanate nano-fibre (CTNF) for bone drug protein sustained release

N2 - The discovery of a giant dielectric constant of >105 in calcium copper titanate (CCTO) has generated significant interest for application in electronic devices. Over the past decade, many methods have been developed to synthesize CCTO particles in an effort to capitalize upon the outstanding dielectric properties. Polymer film capacitors are one application where CCTO could greatly increase the typically low dielectric constant of the polymer. Recent work has shown that the aspect ratio of the dispersed filler can greatly affect the dielectric constant of the polymer with high aspect ratio nanowires (NWs) producing greater dielectric constant and energy density than spherical particles. While CCTO NWs hold great potential to improve the properties of nanocomposite capacitors, no method currently exists for their preparation and their integration is challenged by the barrier layer capacitance which leads to high dielectric loss. Here, a novel two-step hydrothermal reaction is developed for the large-scale synthesis of CCTO NWs and an insulating barrier layer is applied to greatly reduce the loss while preserving the high dielectric constant.

AB - Perovskite BaTiO3:hydroxyapatite (HAp) composites have shown promises for possible applications in synthetic bone materials. This paper reports the synthesis and electrical properties of composites of the perovskite family calcium titanate, a well known ferroelastic material that shows quantum paraelectric-like dielectric behavior at temperatures below 50K, with hydroxyapatite. The dielectric and pyroelectric properties of these composites have been studied. The results show that CaTiO3 retains its characteristic behavior in the composite with HAp and thus its quantum paraelectric-like behavior is sustained. Results are discussed in view of the standard Barrett equation for the quantum paraelectric or incipient ferroelectric behavior.

An Overview on Recent Developments in the Synthesis, Characterization and Properties of High Dielectric Constant Calcium Copper Titanate Nano-Particles
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    Thermodynamics of the Hydrothermal Synthesis of Calcium Titanate with Reference to Other Alkaline-Earth Titanates

  • Barium Calcium Titanate, Production Process Thereof …

    Calcium titanate - Wikipedia

  • Calcium Copper Titanate | AMERICAN ELEMENTS

    Calcium titanate is an inorganic compound with the chemical formula Ca Ti O 3

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Synthesis, Dielectric Properties, Film Deposition and Sensing ..

N2 - Perovskite BaTiO3:hydroxyapatite (HAp) composites have shown promises for possible applications in synthetic bone materials. This paper reports the synthesis and electrical properties of composites of the perovskite family calcium titanate, a well known ferroelastic material that shows quantum paraelectric-like dielectric behavior at temperatures below 50K, with hydroxyapatite. The dielectric and pyroelectric properties of these composites have been studied. The results show that CaTiO3 retains its characteristic behavior in the composite with HAp and thus its quantum paraelectric-like behavior is sustained. Results are discussed in view of the standard Barrett equation for the quantum paraelectric or incipient ferroelectric behavior.

as well as lowering the synthesis temperature.

Perovskite BaTiO3:hydroxyapatite (HAp) composites have shown promises for possible applications in synthetic bone materials. This paper reports the synthesis and electrical properties of composites of the perovskite family calcium titanate, a well known ferroelastic material that shows quantum paraelectric-like dielectric behavior at temperatures below 50K, with hydroxyapatite. The dielectric and pyroelectric properties of these composites have been studied. The results show that CaTiO3 retains its characteristic behavior in the composite with HAp and thus its quantum paraelectric-like behavior is sustained. Results are discussed in view of the standard Barrett equation for the quantum paraelectric or incipient ferroelectric behavior.

Coprecipitation and Hydrothermal Synthesis of …

AB - The discovery of a giant dielectric constant of >105 in calcium copper titanate (CCTO) has generated significant interest for application in electronic devices. Over the past decade, many methods have been developed to synthesize CCTO particles in an effort to capitalize upon the outstanding dielectric properties. Polymer film capacitors are one application where CCTO could greatly increase the typically low dielectric constant of the polymer. Recent work has shown that the aspect ratio of the dispersed filler can greatly affect the dielectric constant of the polymer with high aspect ratio nanowires (NWs) producing greater dielectric constant and energy density than spherical particles. While CCTO NWs hold great potential to improve the properties of nanocomposite capacitors, no method currently exists for their preparation and their integration is challenged by the barrier layer capacitance which leads to high dielectric loss. Here, a novel two-step hydrothermal reaction is developed for the large-scale synthesis of CCTO NWs and an insulating barrier layer is applied to greatly reduce the loss while preserving the high dielectric constant.

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