Study on Formation Mechanism of Fayalite (Fe2SiO4) by Solid State Reaction in Sintering Process

JOM ◽  
2017 ◽  
Vol 70 (4) ◽  
pp. 539-546 ◽  
Author(s):  
Zhongbing Wang ◽  
Bing Peng ◽  
Lifeng Zhang ◽  
Zongwen Zhao ◽  
Degang Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction ◽  
Sintering Process

Formation mechanism of Mn x Fe 3−x O 4 by solid-state reaction of MnO 2 and Fe 2 O 3 in air atmosphere: Morphologies and properties evolution

2017 ◽  
Vol 313 ◽  
pp. 201-209 ◽  
Author(s):  
Bingbing Liu ◽  
Yuanbo Zhang ◽  
Zijian Su ◽  
Manman Lu ◽  
Zhiwei Peng ◽  
...  
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction ◽  
Air Atmosphere

Effects of CuO on the Preparation, Microstructure and Dielectric Response of CaCu3Ti4O12

2008 ◽  
Vol 368-372 ◽  
pp. 121-122
Author(s):  
Jian Fang Qiao ◽  
Dan Dan Qin ◽  
Li Guan ◽  
Hai Long Wang ◽  
Rui Zhang
Keyword(s):  
Solid State ◽  
Grain Growth ◽  
Barrier Layer ◽  
Solid State Reaction ◽  
Dielectric Response ◽  
Second Step ◽  
Sintering Process ◽  
Ceramic Capacitor ◽  
Inhomogeneous Microstructure ◽  
Maximum Permittivity

CaCu3Ti4O12 (CCTO) barrier layer ceramic capacitor was prepared by a two-step sintering process. The CCTO powders were pre-synthesized at 900oC by solid-state reaction and the effects of the amount of CuO on the formation of the CCTO powders were investigated. The CCTO ceramics were prepared by the second-step sintering. It was found that the abnormal grain growth and inhomogeneous microstructure are controlled by the amount of excessive CuO. The optimized CuO content in the composites is ~14 wt%. The maximum permittivity is 115,000 (1 kHz, 210oC).

Formation Mechanism of Garnet-Like Li7La3Zr2O12 Powder Prepared by Solid State Reaction

2016 ◽  
Vol 45 (3) ◽  
pp. 612-616 ◽  
Author(s):  
Hongxia Geng ◽  
Kai Chen ◽  
Di Yi ◽  
Ao Mei ◽  
Mian Huang ◽  
...  
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction

scholarly journals Metallurgical Mechanism and Optical Properties of CuSnZnSSe Powders Using a 2-Step Sintering Process

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Tai-Hsiang Liu ◽  
Fei-Yi Hung ◽  
Truan-Sheng Lui ◽  
Kuan-Jen Chen
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Raman Shift ◽  
Sintering Process ◽  
Composition And Structure ◽  
Absorber Material ◽  
The Stability ◽  
Stability Of Structure ◽  
Sintering Processes

Cu2SnZn(S + Se)4is an excellent absorber material for solar cells. This study obtained Cu2SnZn(S + Se)4powders through solid state reaction by the ball milling and sintering processes from elemental Cu, Zn, Sn, S, and Se without using either polluting chemicals or expensive vacuum facilities. Ratios of S/S + Se in CuSnZnSSe were controlled from 0 to 1. The results showed that the 2-step sintering process (400°C for 12 hrs and then 700°C for 1 hr) was able to stabilize the composition and structure of the CuSnZnSSe powders. The crystallized intensity of the CuSnZnS matrix decreased with increasing the Se content. Raising the Se content restrained the SnS phase and reduced the resistance of the absorber layer. In addition, Raman data confirmed that Se caused a Raman shift in the CuSnZnSSe matrix and enhanced the optical properties of the CuSnZnSSe powders. For the interface of CuSnZnSSe film and Mo substrate, Mo could diffuse into CuSnZnSSe matrix after 200°C annealing. The interface thermal diffusion of CuSnZnSSe/ZnS improved the effects of stack to enhance the stability of structure.

scholarly journals Influence of Carbon Content on Superconductivity of Bi2Sr2CaCu2Ox

2017 ◽  
Vol 5 (1) ◽  
pp. 77
Author(s):  
Deawha Soh ◽  
Zhanguo Fan ◽  
N. Korobova
Keyword(s):  
Solid State ◽  
Grain Boundary ◽  
Critical Current Density ◽  
Carbon Content ◽  
Critical Current ◽  
Conventional Method ◽  
Current Density ◽  
Solid State Reaction ◽  
Sintering Process ◽  
Shs Method

<p>Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>X</sub> was prepared by the conventional method of solid state reaction and SHS method. The samples were annealed in different atmosphere in order to examine the influence of atmospheres on the carbon contents in the Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>X</sub> compound. The lowest carbon content in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>X</sub> could be attended when the sample was annealed in O<sub>2</sub> at 800 °C for 100 hours. The CO<sub>2</sub> in air pollute the samples and increase the carbon content in the sintering process. The critical current density of the Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>X</sub> samples will decrease with the increasing carbon contents in the samples. The impurity carbon will deposit in the grain boundary, which makes critical current density lower.</p>

scholarly journals Preparation and Formation Mechanism of the (NH4)3PMo6W6O40 Nanoparticles by Solid State Reaction at Room Temperature

2003 ◽  
Vol 19 (08) ◽  
pp. 733-736
Author(s):  
Zhou Li-Qun ◽  
◽  
Liu Shi-Zhong ◽  
Yu Guo-Feng ◽  
Sun Ju-Tang
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction ◽  
Room Temperature

Dielectric Properties of Mg-Doped CaCu3Ti4O12 Measured at High Frequencies

2014 ◽  
Vol 895 ◽  
pp. 190-193
Author(s):  
Mohd Fariz Ab Rahman ◽  
Sabar Derita Hutagalung ◽  
Julie Juliewatty Mohamed ◽  
Mohd Fadzil Ain
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Dielectric Loss ◽  
Solid State Reaction ◽  
Single Phase ◽  
Raw Materials ◽  
Sintering Process ◽  
High Frequencies ◽  
Mg Doped

Mg-doped CaCu3Ti4O12 (CCTO) systems were prepared by solid state reaction using raw materials of CaCO3, CuO, TiO2 and MgO. The samples were calcined at 900°C for 12 hours and sintered at 1030°C for 10 hours. Single phase CCTO formed after sintering process. It was found that dielectric constant and dielectric loss of CCTO improved by MgO dopant.

Optimal Charge and Discharge Capacity Effects of the Sintering Process on LiMn2O4 by the Solid-State Reaction Method

2013 ◽  
Vol 377 ◽  
pp. 141-145 ◽  
Author(s):  
Yen Chun Liu ◽  
Mao Chieh Chi ◽  
Ming Cheng Liu
Keyword(s):  
Solid State ◽  
Discharge Capacity ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Discharge Voltage ◽  
Operating Voltage ◽  
Initial Discharge Capacity ◽  
Sintering Process ◽  
Charge Voltage ◽  
Initial Discharge

This study investigates the optimal charge and discharge capacity of the sintering process on the lithium battery spinel - LiMn2O4. Both Li2CO3 and Mn3O4 are utilized to synthesize the cathode material LiMn2O4 using the solid-state reaction. Cathode materials are processed to fabricate batteries at temperatures ranging from 800°C to 900°C. Test results reveal that the highest initial discharge capacity of 105.19 mAhg-1 (theoretically at 148 mAhg-1) has been obtained at the temperature of 850°C in the sintering process for synthesis of LiMn2O4. In addition, the initial discharge capacity can be increased to 140.51 mAhg-1 with both overdosing the amount of lithium by 2% and increasing the range of operating voltage. The increasing of the charge voltage ranges from 4.5V to 4.8V and reducing of the discharge voltage ranges from 3.0V to 2.8V.

scholarly journals Influence of NaCl on the formation of stoichiometric polycrystalline La0.85Na0.15MnO3

2019 ◽  
Vol 54 (4) ◽  
pp. 289-296
Author(s):  
R Majumder ◽  
MM Hossain ◽  
ME Hossain ◽  
MAR Sarker
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Solid State Reaction ◽  
Lanthanum Manganite ◽  
Sintering Process ◽  
Flux Method ◽  
Solid State Reaction Technique ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Synthesis Technique

Origination of defects and loss of Na during the sintering process are the major problems for the conventional solid-state synthesis technique to form sodium (Na) doped lanthanum manganite. To minimize defect and Na loss during the sintering process, the sodium (Na) doped lanthanum manganite with 15% substitution of La by Na (La0.85Na0.15MnO3) was synthesized using the NaCl flux material incorporated with the conventional solid-state reaction technique (flux method). The amount of micro strain, lattice strain and dislocation density for the flux method to grow polycrystalline La0.85Na0.15MnO3were detected successfully. The structural study using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive Analysis X-Ray (EDAX) showed that the use of flux synthesis technique instead of conventional solid-state reaction technique was satisfactory to obtain stoichiometric La0.85Na0.15MnO3 polycrystalline structure with a smaller defect. From the closer inspection of the XRD spectrum for La0.85Na0.15MnO3 significantly showed a higher order layered structure for the cathode material for using this flux technique, which is a very important feature to increase the efficiency of the cathode material. Bangladesh J. Sci. Ind. Res.54(4), 289-296, 2019

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