scholarly journals Preparation and crystal structure of La0.7Ba0.1Sr0.2Mn0.9Cu0.1O3 perovskite: a comparison between sol-gel and solid state process

2019 ◽  
Vol 1170 ◽  
pp. 012050
Author(s):  
D S Razaq ◽  
B Kurniawan
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Sol Gel ◽  
State Process

Physical properties of La0.7Ca0.2Sr0.1MnO3 manganite: a comparison between sol–gel and solid state process

2016 ◽  
Vol 28 (4) ◽  
pp. 3648-3658 ◽  
Author(s):  
A. Ezaami ◽  
N. Ouled Nasser ◽  
W. Cheikhrouhou-Koubaa ◽  
M. Koubaa ◽  
A. Cheikhrouhou ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Sol Gel ◽  
State Process

scholarly journals Optimization of Li4Ti5O12 (LTO) performance through the addition of ZnO-Nanorods using sol-gel solid-state method process as half-cell lithium-ion battery anode

2018 ◽  
Vol 67 ◽  
pp. 03028
Author(s):  
B Priyono ◽  
NY Radiawan ◽  
AH Yuwono ◽  
C Hudaya ◽  
A Subhan ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Performance Optimization ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Lithium Ion ◽  
Solid State Method ◽  
State Process ◽  
Phase And Chemical Composition

Lithium-ion batteries have been a substantial power source for most electrical devices nowadays. Performance optimization for anode of lithium-ion batteries (LIBs) can be conducted by adding ZnO through sol-gel solid-state reaction. In this research, the Li4Ti5O12 (LTO) used was synthesized through sol-gel solid-state process and directly added with ZnO-nanorods obtained from aging and annealing process. LTO-ZnO obtained was characterized to determine the main phase and chemical composition by XRD and SEM-EDS respectively. Electrochemical performance of LTO-ZnO was tested by EIS, CV, and CD. ZnO-nanorods characterization with SEM-EDS results shows that the ZnO inside the LTO dispersed homogeneously. Characterization using XRD revealed that the ZnO successfully enter the LTO with the variation of amount of 4, 7, and 10 wt % of ZnO. Electric conductivity test shows improvement at an optimum addition amount of ZnO at 4 wt%, although BET result shows at the optimum amount of surface area with 96.459 m2/g. Electrochemical performance result shows optimum performance in ZnO at 4 wt% for its ability to withstand EIS test at 20C compared to 7 wt% and 10 wt%. Also, capacity of 4 wt% added is 150.8 mAh/g compared to 7 wt% with 134.1 mAh/g and 10 wt% with 118.3 mAh/g.

Critical properties in La0.7Ca0.2Sr0.1MnO3 manganite: A comparison between sol-gel and solid state process

2017 ◽  
Vol 693 ◽  
pp. 658-666 ◽  
Author(s):  
A. Ezaami ◽  
I. Sfifir ◽  
W. Cheikhrouhou-Koubaa ◽  
M. Koubaa ◽  
A. Cheikhrouhou
Keyword(s):  
Solid State ◽  
Sol Gel ◽  
Critical Properties ◽  
State Process

Preparation of Ternary Compound BaLi2Ti6O14 by the Sol-Gel Process

2006 ◽  
Vol 510-511 ◽  
pp. 102-105 ◽  
Author(s):  
Lorena L. Garza-Tovar ◽  
Leticia M. Torres-Martínez
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Solid State ◽  
Sol Gel ◽  
Ammonium Hydroxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Sol Gel Process ◽  
Ceramic Compound

Ceramic compound with the formula BaLi2Ti6O14 was prepared by sol-gel method at basic conditions, using ammonium hydroxide as hydrolysis catalyst. Some portions of gel sample obtained were heat treated at 200, 400, 600, and 800°C. Samples were characterized by X-ray diffraction (XRD), thermal analysis (DTA-TGA), UV-Vis and FTIR. Crystalline phase was formed when a sample was treated at 800°C for 6h. This material has been previously synthesized by solid state reaction using temperatures as high as 900-1150°C for 2 to 10 days. The crystal structure of BaLi2Ti6O14 is similar to that corresponding strontium containing phase, SrLi2Ti6O14, which has been reported as catalyst for oxidative dehydrogenation of lower alkanes.

The use of high-resolution FESEM to study solid-state phase transformations and reactions

1994 ◽  
Vol 52 ◽  
pp. 1028-1029
Author(s):  
P. G. Kotula ◽  
D. D. Erickson ◽  
C. B. Carter
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Phase Transformations ◽  
High Efficiency ◽  
Sol Gel ◽  
Quantitative Information ◽  
Solid State Reactions ◽  
Critical Dimensions ◽  
Backscattered Electrons ◽  
Backscattered Electron

High-resolution field-emission-gun scanning electron microscopy (FESEM) has recently emerged as an extremely powerful method for characterizing the micro- or nanostructure of materials. The development of high efficiency backscattered-electron detectors has increased the resolution attainable with backscattered-electrons to almost that attainable with secondary-electrons. This increased resolution allows backscattered-electron imaging to be utilized to study materials once possible only by TEM. In addition to providing quantitative information, such as critical dimensions, SEM is more statistically representative. That is, the amount of material that can be sampled with SEM for a given measurement is many orders of magnitude greater than that with TEM.In the present work, a Hitachi S-900 FESEM (operating at 5kV) equipped with a high-resolution backscattered electron detector, has been used to study the α-Fe2O3 enhanced or seeded solid-state phase transformations of sol-gel alumina and solid-state reactions in the NiO/α-Al2O3 system. In both cases, a thin-film cross-section approach has been developed to facilitate the investigation. Specifically, the FESEM allows transformed- or reaction-layer thicknesses along interfaces that are millimeters in length to be measured with a resolution of better than 10nm.

Improved Sol-Gel Materials for Efficient Solid State Dye Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
Michael Canva ◽  
Patrick Georges ◽  
Jean-Fran^ois Perelgritz ◽  
Alain Brun ◽  
Fréddric Chaput ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Tunable Lasers ◽  
Optical Quality ◽  
Dye Lasers ◽  
Laser Dyes ◽  
Host Matrix ◽  
Host Matrices

AbstractPhotoresistant laser dyes were trapped in silica based xerogel host matrices to obtain solid state tunable lasers. For this purpose very dense xerogel samples with improved chemical and physical properties were prepared at room temperature by the sol-gel technology. The as-prepared materials were polished to obtain optical quality surfaces and were used as new lasing media.Lasing action of such different dyes as rhodamine, perylene and pyrromethene doping dense sol-gel matrices was demonstrated. Efficiencies of 30 % or lifetimes of more than 100,000 shots were achieved with different new ≤dye dopant/host matrix≥ couples. Their different performances are reviewed and discussed.

Ruthenium(II) Complexes Bearing Thioether-Appended α- Iminopyridine Ligands: Arene Precursors Permit Access to K2-N,N and K3-N,N,S Complexes

2019 ◽  
Author(s):  
Victoria A. Ternes ◽  
Hannah A. Morgan ◽  
Austin P. Lanquist ◽  
Michael P. Murray ◽  
Bradley Wile
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Strong Field ◽  
Active Role ◽  
Binding Mode ◽  
Phenethyl Alcohol ◽  
Ru Complexes

Herein we report the preparation of a series of Ru(II) complexes featuring alpha-iminopyridine ligands bearing thioether functionality (NNS<sup>R</sup>, where R = Me, CH<sub>2</sub>Ph, Ph). Metallation using (<i>p</i> cymene)RuCl dimer permits access to (k<sup>2</sup>-N,N)Ru complexes in which the thioether moiety remains uncoordinated. In the presence of a strong field ligand such as acetonitrile or triphenylphosphine, the p-cymene moiety is displaced, and the ligand adopts a k<sup>3</sup>-N,N,S binding mode. These complexes are characterized using a combination of solution and solid state methods, including the crystal structure of [(NNS<sup>Me</sup>)Ru(NCMe)<sub>2</sub>Cl]Cl. The k<sup>2</sup>-N,N Ru(II) complexes are shown to serve as efficient precatalysts for the oxidation of sec-phenethyl alcohol at 5 mol% loadings, using a variety of external oxidants and solvents. The complex bearing an S-Ph donor was found to be the most active of those surveyed, suggesting that the thioether donor plays an active role in catalyst speciation for this transformation.

Crystal structure of tetraoxa[4]peristylane: Novel CH…O mediated architecture in the solid state

1999 ◽  
Vol 40 (12) ◽  
pp. 2417-2420 ◽  
Author(s):  
Goverdhan Mehta ◽  
Ramdas Vidya ◽  
Kailasam Venkatesan
Keyword(s):  
Crystal Structure ◽  
Solid State
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