Structural, electrical, and optical absorption properties of LaxCd1−xO solid solution films obtained by sol–gel method

Recently, using microwave devices that emit electromagnetic waves and enhance the convenience of life have increased; however, they can be harmful to the environment. In this study, CuFe2O4 nanoparticles were prepared through the conventional sol-gel procedure and then were characterized by X-ray powder diffraction (XRD), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), and vector network analyzer (VNA) using S parameters. Results illustrated that pure crystal structure of magnetic nanoparticles has been synthesized by the sol-gel method with magnetic saturation (Ms) of 22 emu/g. Finally, CuFe2O4 nanoparticles were composited by silicone rubber to investigate its microwave absorption properties. Results showed that the CuFe2O4/silicone rubber nanocomposite absorbed more than 94.87% of the microwave irradiation at ku-band frequency with 1.7 mm thickness and the maximum reflection loss was −60.38 dB at 16.1 GHz. Magnetic and dielectric properties of the CuFe2O4 nanoparticles and silicone rubber polymeric matrix in the nanocomposite demonstrated desirable microwave absorption properties.

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Study on Preparation and Optical Absorption of Ge Doped TiO2 Composite Thin Films by Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.299-300.558 ◽

2011 ◽

Vol 299-300 ◽

pp. 558-561 ◽

Cited By ~ 3

Author(s):

Yan Jun Zhou ◽

Fang He ◽

Jin Gang Qi ◽

Yu Lin Wang

Keyword(s):

Thin Films ◽

Optical Absorption ◽

Sol Gel ◽

Visible Region ◽

Diffraction Peak ◽

Composite Thin Films ◽

Gel Method ◽

Sol Gel Method ◽

Chemical States ◽

Quartz Substrates

By using the sol-gel method, TiO2 thin films and Ge doped TiO2 composite thin films were fabricated onto quartz substrates. XRD, XPS and UV-vis were used to characterize the phase structure, the atomic chemical states and optical absorption of these composite TiO2 thin films. XRD results indicate that diffraction peak of anatase is observed in samples. XPS result reveals that there is Ge crystal in Ge doped films which were prepared by sol-gel method, and Ge exists as elemental Ge and GeO2 in the films. The composite TiO2 thin films by sol-gel method exhibits the absorption shift to visible region due to Ge doped TiO2 thin films.

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Synthesis of Li3xLa1−xVO4 solid solution by citrate sol–gel method and its ionic conductivity

Materials Chemistry and Physics ◽

10.1016/s0254-0584(00)00204-2 ◽

2000 ◽

Vol 65 (1) ◽

pp. 85-89 ◽

Cited By ~ 5

Author(s):

Xiuqin Song ◽

Rufen Chen ◽

Miying Jia

Keyword(s):

Solid Solution ◽

Ionic Conductivity ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method

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Structural, Optical and Magnetic Properties of (1−x)Bi0.5Na0.5TiO3+xBaCoO3−δ Solid Solution Systems Prepared by the Sol–Gel Method

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19090 ◽

2021 ◽

Vol 21 (4) ◽

pp. 2604-2612

Author(s):

Dang Duc Dung ◽

Nguyen The Hung

Keyword(s):

Solid Solution ◽

Magnetic Properties ◽

Sol Gel ◽

Host Lattice ◽

Ferroelectric Materials ◽

X Ray Diffraction ◽

Gel Method ◽

Sol Gel Method ◽

Lattice Materials ◽

Rhombohedral Symmetry

A new solid solution, (1−x)Bi0.5Na0.5TiO3+xBaCoO3−δ materials, was fabricated using the sol–gel method. X-ray diffraction showed that the crystal structure of the compound exhibited rhombohedral symmetry and is similar to the crystal structures of host Bi0.5Na0.5TiO3 materials. Distortions in the structures and reduction in the optical band gaps of the Bi0.5Na0.5TiO3 materials were possibly due to the random incorporation of Ba and Co cations into host lattice materials. The magnetic properties of the Bi0.5Na0.5TiO3 materials were tuned by controlling the concentrations of BaCoO3−δ as the solid solution. We expect that our work will provide valuable information on current methods for integrating ferromagnetic properties into lead-free ferroelectric materials for the development of multiferroic materials.

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The Impact of Zr Substitution on the Crystal Structure of Yb Doped BaCeO3 Solid Solution Prepared by a Sol-Gel Method

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.317.412 ◽

2021 ◽

Vol 317 ◽

pp. 412-416

Author(s):

Nafisah Osman ◽

Nurul Waheeda Mazlan ◽

Oskar Hasdinor Hassan ◽

Zakiah Mohamed

Keyword(s):

Crystal Structure ◽

Solid Solution ◽

Goodness Of Fit ◽

Sol Gel ◽

Proton Conductor ◽

Diffraction Measurement ◽

Barium Cerate ◽

Gel Method ◽

Sol Gel Method ◽

The Impact

A modified sol-gel method using metal nitrate salts was adopted to synthesis proton conductor of Ba(Ce1-xZrx)0.95Yb0.05O2.975 where x=0.2, 0.3, 0.4, 0.5 and 0.6 ceramic powders. The aim of this work is to study the crystal structure of Yb-doped barium cerate solid solution at different Zr concentrations. The powder was calcined at 1100°C for 12 hours and pressed at 5 tons to become a pellet by a dry pressing technique. The pellet was sintered at 1400°C in air for 6 hours and ground to powder form prior to the X-ray diffraction measurement. The raw diffraction data of the sample at room temperature was analyzed using Rietveld refinement method in X’pert Highscore software. Cubic crystal structure was observed by software with goodness of fit in average 2.82. Phase formation, structure analysis and the empirical rule which holds the linear relation between lattice parameters at different Zr concentrations using Vegard’s Law were also presented and discussed.

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Nanocrystalline CNT-TiO2 Composites Produced by an Acid Catalyzed Sol-Gel Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.587-588.849 ◽

2008 ◽

Vol 587-588 ◽

pp. 849-853 ◽

Cited By ~ 3

Author(s):

Cláudia G. Silva ◽

Wen Dong Wang ◽

Joaquim L. Faria

Keyword(s):

Carbon Nanotube ◽

Sol Gel ◽

Pure Tio2 ◽

Absorption Properties ◽

Interphase Interaction ◽

Gel Method ◽

Sol Gel Method ◽

Composite Catalysts ◽

Acid Catalyzed

Carbon nanotube-TiO2 composites and pure TiO2 are prepared by a modified sol-gel method. The nanoscaled materials obtained are extensively characterized by spectroscopic, microscopic and calorimetric techniques. Their photoactivity is tested in the degradation of phenol under visible illumination. A correlation between the CNT content and the changes in the UV–vis absorption properties was found. The effect induced by CNT on the composite catalysts is explained in terms of an interphase interaction between CNT and TiO2 in the composite catalysts.

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Preparation and Electromagnetic Wave Absorption Properties of Carbon Nanotubes-Titanium Dioxide Nanoparticles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.457-458.225 ◽

2012 ◽

Vol 457-458 ◽

pp. 225-228 ◽

Cited By ~ 1

Author(s):

Xin Jun Wang ◽

Fang Wang ◽

Chen Gao ◽

Dong Shan Sun

Keyword(s):

Carbon Nanotubes ◽

Titanium Dioxide ◽

Titanium Dioxide Nanoparticles ◽

Sol Gel ◽

Weight Fraction ◽

Absorption Properties ◽

Gel Method ◽

Sol Gel Method ◽

Microwave Absorbing Materials ◽

Coated Carbon

A novel titanium dioxide （TiO2） nanoparticles coated carbon nanotubes (CNTs) composites were prepared by sol-gel method as microwave absorbing materials in this paper. SEM and XRD researches show that sol-gel method can realize uniform coating of CNTs with TiO2. Among them, with the weight fraction of TiO2/ CNTs composites was 10%, microwave absorption characteristics with a minimum RL value of -34 dB at 6.2 GHz on a coating with a matching thickness of 4mm and <−10 dB was obtained in the frequency range of 4.5-18 GHz with the thickness of 1.5-5.0mm.

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