MOCVD deposition of CoAl2O4 films

Carta, Giovanni; Casarin, Maurizio; Habra, Naida El; Natali, M.; Rossetto, G.; Sada, Cinzia; Tondello, Eugenio; Zanella, P.

doi:10.1016/j.electacta.2004.10.094

Cited by 33 publications

(32 citation statements)

References 27 publications

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“…5). This effect can be attributed to the reduction of Co 3+ to Co 2+ , which is a thermodynamically favored process at temperatures higher than 700 • C [1,9]. Samples annealed at 900 • C show no absorption in the wavelength range between 320 and 420 nm (Fig.…”

Section: Color Evolution and Uv-vis Analyses Of Heat-treated Samplesmentioning

confidence: 93%

“…When such material is in a form of micron-sized pigment, it is opaque, having good hiding power. On the other hand, when it is in the form of nano-sized pigment dispersed in a matrix, it exhibits transparency along with color generation [1].…”

Section: Phase Evolution and Structural Analysis Of Heat-treated Samplesmentioning

confidence: 99%

“…This intense blue color pigment, known as Thénard blue is characterized by its thermal and chemical stability, and also by its stability to solar exposure and atmospheric agents [1]. Beside ceramic, it is widely used for the coloration of plastics, paint, fibers, paper, rubber, glass and cement [1].…”

Section: Introductionmentioning

confidence: 99%

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Evolution of structural and optical properties in the course of thermal evolution of sol–gel derived cobalt-doped gahnite

Kurajica

Tkalčeć

Gržeta

et al. 2011

Journal of Alloys and Compounds

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Section: Color Evolution and Uv-vis Analyses Of Heat-treated Samplesmentioning

confidence: 93%

Section: Phase Evolution and Structural Analysis Of Heat-treated Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of structural and optical properties in the course of thermal evolution of sol–gel derived cobalt-doped gahnite

Kurajica

Tkalčeć

Gržeta

et al. 2011

Journal of Alloys and Compounds

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“…Copper 53 , freeze-drying 54 , sol-gelhydrothermal method 55 , ultrasonic-assisted-hydrothermal method 56 , polymerized complex technique 57 , chemical vapor deposition 58 , and via supercritical water conditions 59 . In this work, both copper and cobalt aluminates were prepared by route using chitosan as template.…”

Section: Introductionmentioning

confidence: 99%

Production of Copper and Cobalt Aluminate Spinels and Their Application As Supports for Inulinase Immobilization

et al. 2015

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Copper and cobalt aluminates were obtained through the use of chitosan as template. In this synthesis route, chitosan is eliminated by heating, and a porous material is produced. These oxides were used as supports for inulinase immobilization by adsorption process. Physical properties of produced particles were analyzed by X-ray diffraction (XRD) and nitrogen adsorption-desorption isotherms. Both oxides presented particles containing mesoporous characteristics and high surface area, which is desirable for applications in enzyme immobilization processes. The results revealed that the copper and cobalt aluminates exhibit high inulinase immobilization efficiencies, which makes them promising supports for enzyme immobilization.

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“…These composites with metal ions have wide range of application in electrical and electronic industries 8,9 . So CASC composite is a leading candidate for high transmitting IR windows, electronic material, humidity sensors, protective coatings with pigments, electrical insulators, and turbine engine components etc [10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

<strong>Cobalt Alumino Silicate Ceramic(CASC) nanocomposite, a material with moderately high dielectric constant </strong><strong>and low tangent loss at a critical concentration in high frequency range.</strong>

Paul

Manna

Roy

et al. 2015

Proceedings of MOL2NET, International Conference on Multidisciplinary Sciences

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Cobalt Alumino Silicate Ceramic (CASC) composites, with different molar weight concentration (i.e. G0=0, G1=0.4, G2=0.6, G3=0.8, G4=1.0, and G5=1.2 (M.W.)) of cobaltus acetate are prepared via sol-gel route. XRD shows mullite and cobalt aluminate phase which is found to depend on the concentrations of Co +2 ions. Field emission scanning electron microscope (FESEM) images show for all samples of CASC nanocomposites after sintering at 1400 o C, nano sized cobalt aluminate grains are embedded in evenly spread mullite grains; but in case of G0, there are only evenly spread mullite grains. The study of dielectric property of the composite samples at room temperature shows that at all concentration (G1, G2, G3, G4 and G5) the dielectric constant is higher than pure mullite (G0) and there is a critical concentration of cobaltus acetate (G3) where there is maximum enhancement of dielectric constant in the higher frequency range from 40 KHz to 2 MHz. The dielectric constant varies from 44.77 to 37.75 for G3 and from 29.8 to 24.12 for G0 respectively. The tangent loss of composite with G3 has the lowest value than that of other concentrations including pure mullite in the frequency range 40 KHz to 2MHz. Due to high dielectric constant and low tangent loss, the composite with specific concentration and in the high frequency range has great importance as an electronic material. .

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MOCVD deposition of CoAl2O4 films

Cited by 33 publications

References 27 publications

Evolution of structural and optical properties in the course of thermal evolution of sol–gel derived cobalt-doped gahnite

Evolution of structural and optical properties in the course of thermal evolution of sol–gel derived cobalt-doped gahnite

Production of Copper and Cobalt Aluminate Spinels and Their Application As Supports for Inulinase Immobilization

<strong>Cobalt Alumino Silicate Ceramic(CASC) nanocomposite, a material with moderately high dielectric constant </strong><strong>and low tangent loss at a critical concentration in high frequency range.</strong>

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