scholarly journals Comparison of barium titanate thin films prepared by inkjet printing and spin coating

2015 ◽  
Vol 9 (3) ◽  
pp. 151-156 ◽  
Author(s):  
Jelena Vukmirovic ◽  
Djordjije Tripkovic ◽  
Branimir Bajac ◽  
Sanja Kojic ◽  
Goran Stojanovic ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Inkjet Printing ◽  
Spin Coating ◽  
Structural Characteristics ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Advantages And Disadvantages ◽  
Inkjet Printer ◽  
Deposited Films ◽  
Deposition Techniques

In this paper, barium titanate films were prepared by different deposition techniques (spin coating, office Epson inkjet printer and commercial Dimatix inkjet printer). As inkjet technique requires special rheological properties of inks the first part of the study deals with the preparation of inks, whereas the second part examines and compares structural characteristics of the deposited films. Inks were synthesized by sol-gel method and parameters such as viscosity, particle size and surface tension were measured. Deposited films were examined by optical and scanning electron microscopy, XRD analysis and Raman spectroscopy. The findings consider advantages and disadvantages of the particular deposition techniques.

Multi-Layer Microstructure of Sol-Gel Barium Titanate Thin Films for Optical Waveguide Applications

2015 ◽  
Vol 815 ◽  
pp. 136-140
Author(s):  
S.H. Najamudin ◽  
H.Mohd Yusof ◽  
Ala’eddin A. Saif ◽  
R.A. Osman ◽  
P. Poopalan
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Barium Titanate ◽  
Optical Waveguide ◽  
Spin Coating ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Diffraction Intensity ◽  
Number Of Layers ◽  
Crucial Part

— Barium titanate (BaTiO3) thin films are suitable for many application especially photonics. BaTiO3thin films are deposited using spin coating with an optimum spin speed of 4500rpm. The samples are then characterized using XRD, AFM and SEM. The results of the XRD analysis showed that both the 5-and 10-coated layers are polycrystalline BaTiO3with differences in terms of diffraction intensity, due to the number of layers. As for optical application, the surface roughness is the most crucial part. The number of layers of 5 and 10 have thickness of 2.927nm and 4.456nm RMS.

Preparation and Dielectric Properties of the Nb and Co Doped Barium Titanate by Sol-Gel Auto-Ignition Synthesis Process

2007 ◽  
Vol 336-338 ◽  
pp. 91-94
Author(s):  
Wen Feng Zhang ◽  
Qing Zhi Yan ◽  
Xin Tai Su ◽  
Chang Chun Ge
Keyword(s):  
Dielectric Properties ◽  
Barium Titanate ◽  
Ball Milling ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Synthesis Process ◽  
Homogeneous Distribution ◽  
Auto Ignition ◽  
Doped Barium Titanate ◽  
Co Doped

The Nb and Co doped barium titanate was synthesized by sol-gel auto-ignition synthesis process (abbreviated SAS) and compared with the doped powder of the same composition prepared by conventional ball milling process. The phase structure, morphology of the two as-obtained powders and correlative dielectric properties of sintered BaTiO3-based ceramics were measured. The XRD analysis demonstrated that the SAS powder was the Ba(M0.047Ti0.953)O3(M=Nb, Co) solid solution based on BaTiO3; it further suggested that Nb and Co cations could replace the Ti ions and reach reciprocal balance of acceptors and donors during the decomposition step of the organic fuel by igniting the dried gel. TEM observation showed that the Ba(M0.047Ti0.953)O3(M=Nb, Co) particles were spherical with the size ranged from 30 to 110nm. Furthermore, it was found that the value of the Curie temperature of both the doped powders was being lowered in comparison with pure BaTiO3 (Tc≈128°C ); and the dielectric constant at room temperature of the SAS powder was 5840, which was much higher than that of the conventional ball milling doped powder(3013). It was attributed to the maximum homogeneous distribution of dopants in Ba-Ti initial solution at atomic level via the SAS process.

Ba0.7Sr0.3TiO3 ferroelectric film prepared with the sol-gel process and its dielectric performance in planar capacitor structure

1998 ◽  
Vol 13 (5) ◽  
pp. 1243-1248 ◽  
Author(s):  
Fan Wang ◽  
Antti Uusimäki ◽  
Seppo Leppävuori ◽  
S. F. Karmanenko ◽  
A. I. Dedyk ◽  
...  
Keyword(s):  
Structural Characteristics ◽  
Sol Gel ◽  
Ion Scattering ◽  
X Ray Diffraction ◽  
Dielectric Performance ◽  
Sol Gel Process ◽  
Planar Capacitor ◽  
Capacitor Structure ◽  
Medium Energy Ion Scattering ◽  
Deposited Films

Ferroelectric Ba0.7Sr0.3TiO3 thin films were successfully deposited on sapphire (r-cut) substrates by the sol-gel process, and the deposited films were annealed at various temperatures and for various soaking times. The compositional and structural characteristics of the films were systematically examined with the aid of x-ray diffraction, scanning electron microscopy, and medium energy ion scattering techniques. Their dependence on thermal processes was investigated. A planar capacitor structure based on the BSTO films was fabricated to evaluate the electrical and dielectric performance. These results, together with the microstructure characteristics, were analyzed and an optimal process was finally established.

Simple Recipe to Synthesize BaTiO3-BaFe12O19 Nanocomposite Bulk System with High Magnetization

2014 ◽  
Vol 493 ◽  
pp. 634-639 ◽  
Author(s):  
Dwita Suastiyantia ◽  
Bambang Soegijono ◽  
M. Hikam
Keyword(s):  
Magnetic Properties ◽  
Barium Titanate ◽  
Sol Gel ◽  
Barium Hexaferrite ◽  
Weight Fraction ◽  
Xrd Analysis ◽  
Hexagonal Structure ◽  
Multiferroic Material ◽  
Raw Material ◽  
Bulk System

Barium titanate BaTiO3 (BTO) - barium hexaferrite BaFe12O19 (BHF) nanocomposite could be as a raw material of multiferroic. Multiferroic is a class of materials with coupled electric, magnetic and structural order parameters that yield simultaneous effects of ferroelectric, ferromagnetism and ferroelasticity in the same material. This material has potential applications in such as spintronic devices and sensors. This work was an earlier research towards formation of multiferroic material. Knowing magnetic properties that will lead to a better understanding of magnetoelectric coupling in multiferroic material is the objective of this research.The samples were BTO and BHF prepared by sol-gel and then were mixed to synthesize composite in bulk system by a conventional techniques in various of weight fraction between BTO : BHF = 1:1 ; 1:2 and 1:3, then samples were sintered at 925°C for 5, 10 and 15 hours for each fraction respectively. Composite phase study was carried out using X-Ray Diffraction (XRD). MPS Magnet Physik EP3 Permagraph L was used to characterize magnetic properties. No residual phases were identified in the XRD analysis for all parameters. The peaks can be only indexed to BaTiO3 and BaFe12O19 phases for all parameters respectively confirming the formation of a BaTiO3-BaFe12O19 composite system. Barium titanate retains its tetragonal structure while barium hexaferrite exhibits hexagonal structure. For weight fraction of BaFe12O19 until 2 parts there is an increase of intrinsic coersive and saturation magnetization value. The maximum values of intrinsic coersive for samples with 5, 10 and 15 hours sintering are of 361.3 kA/m, 359.0 kA/m and 391.6 kA/m respectively and the maximum values of saturation are of 0.1515 T, 0.1516 T and 0.1414 T respectively leading to good characteristics of multiferroic materials.

scholarly journals Inkjet Printing of Sc-Doped TiO2 with Enhanced Photoactivity

Coatings ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 78 ◽  
Author(s):  
Kirill Keller ◽  
Elena Khramenkova ◽  
Vladislav Slabov ◽  
Albina Musin ◽  
Alexander Kalashnikov ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Inkjet Printing ◽  
Large Scale ◽  
Structural Characteristics ◽  
Colloidal Suspension ◽  
Sol Gel ◽  
Rheological Parameters ◽  
Doped Tio2 ◽  
X Ray ◽  
Printing Technique

Here we report the methodology for nanocomposite fabrication based on the inkjet printing technique. Doped TiO2 nanoparticles with Sc contents up to 10 wt.% were synthesized and adapted towards a facile fabrication of microscale structures and thin film printing. Implementation of the state-of-the-art low-temperature synthesis allowed to us successfully incorporate high concentrations of Sc3+ ions into the TiO2 lattice and improve the light absorption characteristics of the resulting materials. Without affecting the anatase structure substantially, Sc doping gave rise to an intensified absorbance capacity and provided the means for the efficient fabrication of Sc-TiO2 microarchitectures via the inkjet printing technique. The changes in the spectral and structural characteristics of the Sc-TiO2 composites were observed by Energy Dispersive X-Ray spectroscopy (EDX), X-ray diffraction (XRD), and UV-vis methods. The rheological parameters of the colloidal suspension based on the synthesized Sc-TiO2 nanoparticles were adapted for inkjet printing in terms of the optimal viscosity, morphology, and surface tension. The developed individual ink characteristics allowed us to produce a close coherence between the enhanced optical properties of the Sc-TiO2 prepared the sol–gel method and the inkjet-printed films. The introduced methodology features the possibility to inkjet-print doped and pure TiO2 robust films for potential large-scale fabrication.

Enhanced Electrochromic Performance of Sol-Gel Derived WO3 Thin Films Assisted by Electrospun PVA Nanofibers

2012 ◽  
Vol 528 ◽  
pp. 249-253
Author(s):  
K. Paipitak ◽  
J. Rattanarak ◽  
D. Pakdeeyingyong ◽  
W. Techitdheera ◽  
S. Porntheeraphat ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Coating ◽  
Emission Spectroscopy ◽  
Tungsten Powder ◽  
Sol Gel ◽  
Xrd Analysis ◽  
X Ray ◽  
Electrochromic Properties ◽  
Wo3 Thin Films ◽  
Scanning Electron

The paper describes the results obtained on the enhanced electrochromic performance of Tungsten oxide (WO3) thin films assisted by electrospun PVA nanofibers. WO3 was fabricated by spin coating technique with tungsten powder as starting precursor. The effect of electrospun-PVA nanofibers layer on structural, chemical composition, surface morphology and electrochromic properties of the films were characterized by X-ray diffractometer (XRD), X-ray photo-emission spectroscopy (XPS), scanning electron microscope (SEM) and UV-VIS spectrophotometer. The XRD analysis suggested that the crystalline of WO3 can be identified as a monoclinic WO3 structure. XPS investigations also confirmed the existence of characteristic peaks of W. The significant enhancement of electrochromic properties of the films is achieved by additive electrospun-PVA nanofiber layer.

Formation of Vanadium Oxide Thin Films Prepared from Aqueous Sol-Gel System

2014 ◽  
Vol 605 ◽  
pp. 79-82 ◽  
Author(s):  
Olivier Monfort ◽  
Tomas Roch ◽  
Maros Gregor ◽  
Leonid Satrapinskyy ◽  
Tomas Plecenik ◽  
...  
Keyword(s):  
Thin Films ◽  
Vanadium Oxide ◽  
Spin Coating ◽  
Gas Sensing ◽  
Sol Gel ◽  
Oxide Thin Films ◽  
Glass Substrates ◽  
Sensing Applications ◽  
Vanadium Oxide Thin Films ◽  
Deposited Films

Vanadium oxide thin films are promising materials for various applications. Much attention has been devoted to thermotropic VO2(M/R) films which exhibit semiconductor-conductor phase transition at 67 °C making them excellent materials for switching applications. Non-thermotropic VO2(B) films are semiconducting and have layered structure which makes them interesting for gas sensing applications. Vanadium pentoxide films are also of great interest for photocatalytic production of H2by H2O decomposition as well as for gas sensing. In this paper the preparation of vanadium oxide thin films by using the spin coating of V2O5·nH2O aqueous gel on Si/SiO2and lime-glass substrates is reported. The as-deposited films were annealed in either air or H2/Ar atmosphere at normal or low pressure in order to prepare V2O5and VO2thin films. The obtained samples were characterized by XRD and SEM.

Synthesis and Properties of Highly Oriented Lead Barium Titanate Thin Film on MgO(100) by a Nonaqueous Sol-Gel Process

2012 ◽  
Vol 581-582 ◽  
pp. 514-518
Author(s):  
Hong Zhu ◽  
Zhi Jun Guo ◽  
Wein Duo Yang ◽  
Wein Feng Chang
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Barium Titanate ◽  
Spin Coating ◽  
Sol Gel ◽  
Chelating Agent ◽  
Titanium Isopropoxide ◽  
Ultraviolet Region ◽  
Sol Gel Process

This study investigated the structure, microstructure and optical properties of the highly-oriented lead barium titanate (Pb1-xBaxTiO3, PBT) thin films prepared on MgO (100) substrate by a nonaqueous sol-gel process. The film precursor was synthesized by the modified sol-gel processing from lead acetate, barium acetate, and titanium isopropoxide, acetylacetone as chelating agent, and ethylene glycol as solvent. This stable precursor was formed by acetylacetone chelating with titanium isopropoxide and then mixing the solution of the acetates. The spin-coating technique was used to deposit the PBT films on MgO (100) substrate with different barium contents and various spin-coating numbers, respectively. X-ray diffraction was employed to study the crystal structure of the thin film and field emission scanning electron microscopy was used to characterize the microstructure of the films. Optical properties of the thin films were investigated by Ultraviolet-visible spectrophotometer. All films exhibited a (100) preferred orientation, especially the PB0.5T (3-coating layers) thin film. In the optical properties, the adsorption wavelength shifted to the ultraviolet region with increasing barium.

A Systematic investigation on structural and optical properties of sol-Gel spin coating fabricate CdS Nanocrystalline thin films: Effect of Ni doping

2021 ◽  
Author(s):  
BRIJLATA SHARMA ◽  
Rajesh Lalwani ◽  
Ruby Das ◽  
Devi Singh Raghuwanshi
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Spin Coating ◽  
Sol Gel ◽  
Band Edge ◽  
Photoluminescence Spectra ◽  
Cds Thin Film ◽  
Vis Spectroscopy ◽  
Deposited Films ◽  
Nanocrystalline Thin Films

Abstract In the present work, we have successfully fabricated undoped and Ni-doped Nanocrystalline CdS thin film on an ultrasonically cleaned glass substrate employing the Sol-Gel spin coating technique. The structural and spectroscopic properties of the films were investigated using XRD spectra, UV-Vis spectroscopy and photoluminescence spectra respectively. The X-Ray diffraction spectra revealed the polycrystalline nature of films with cubic structure and (111) as preferred orientation. The average particle size evaluated by the Debye-Scherrer formula lying in the range 6.65nm to 12.05 nm for the deposited films. According to UV-VIS Spectroscopy, the average transmittance of films in the visible region varies between 70–90%. The optical band gap of CdS thin film was evaluated from absorption spectra. The bandgap of the deposited films is in the range of 2.48 eV to 2.70 eV which is higher than that of bulk CdS (2.42eV). This verifies the blue shifting in band edge of CdS Nanocrystalline thin films due to the quantum confinement effect. Photoluminescence spectra of the thin film showed that the fundamental band edge emission peak centred at 485nm also called blue band emission.

Synthesis of ZnS/SiO2 Core-Shell by Sol-Gel Process and Covering then with Gold Nanoparticle and Study of its Photoluminescence Properties

2012 ◽  
Vol 326-328 ◽  
pp. 238-242 ◽  
Author(s):  
Mirabdullah Seyed Sadjadi ◽  
Nazanin Farhadyar ◽  
K. Zare
Keyword(s):  
Band Gap ◽  
Structural Characteristics ◽  
Sol Gel ◽  
Protective Layer ◽  
Green Emission ◽  
Wide Band ◽  
Xrd Analysis ◽  
Host Lattice ◽  
Core Shell ◽  
Sol Gel Process

Semiconductors have been suggested as ideal candidates for many electrical and optical applications and several groups have reported their successful synthesis in recent years. In particular, ZnS that is a direct wide band gap (3.91 eV) semiconductor and an important phosphor host lattice material, can be used in electroluminescent devices (ELD), due to its large band gap, which enables emission of visible light without absorption and efficient electron transport. In this work, we report synthesis and structural characteristics of gold covered core-shell nanometer size of ZnS/SiO2thin films as a patterning materials for use as a protective layer in optical phase change discs prepared through a simple sol-gel process. The results obtained by transmission electron microscopy (TEM) images showed that, as prepared core-shell materials were well-aligned nanoprticles grew in the same direction and through X-ray diffraction (XRD) analysis, we found that ZnS/SiO2core shell material was composed of crystalline ZnS core covered by an amorphous SiO2shell. Photoluminescence (PL) measurements performed on core-shell samples before and after gold coverig samples have provided information regarding stoichiometric vacancies or interstitial impurities and enhenced intensity of the green emission of ZnS nanowires at room temperature due to sheelding with SiO2.

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