Fabrication of Lithium Silicate Doped with Lithium Titanate by Solid-State Reaction and its XRD Study

2012 ◽  
Vol 624 ◽  
pp. 200-203
Author(s):  
Yu Tian Wang ◽  
You Dong Cao ◽  
Jin Hu ◽  
Wei Jun Zhang ◽  
Da Ping Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Solid Phase ◽  
Raw Materials ◽  
Xrd Analysis ◽  
Lithium Titanate ◽  
Lithium Silicate ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Scanning Calorimetry

Fabrication of lithium silicate powder containing lithium titanate by solid phase reaction method. LiFabrication of lithium silicate powder doped with lithium titanate by solid-state reaction. Take lithium carbonate, silicon dioxide and titania as raw materials and then these powders were mixed according to the different ratios and grinded in an agate mortar for 15 min. And then the mixture were dried at 80°C. Finally, the samples were sintered in vacuum tube furnace at 750, 800, 850 and 900°C for 2h. Thermogravimetric analysis, differential scanning calorimetry and XRD analysis were carried out systematically in this paper. The reaction process and mechanism at different temperatures and the effect of the different ratios and sintering temperature were discussed. Experimental results showed that lithium titanate component increased with increasing amount of titanium dioxide. While the mixture were sintered at 900°C for 2h, there would have lithium silicate and lithium titanate phase.

scholarly journals Formation Mechanism of High-Purity Ti2AlN Powders under Microwave Sintering

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5356
Author(s):  
Weihua Chen ◽  
Jiancheng Tang ◽  
Xinghao Lin ◽  
Yunlong Ai ◽  
Nan Ye
Keyword(s):  
Electron Microscopy ◽  
Formation Mechanism ◽  
High Purity ◽  
Solid Phase ◽  
Raw Materials ◽  
Microwave Sintering ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Scanning Calorimetry ◽  
Transmission Electron

In the present study, high-purity ternary-phase nitride (Ti2AlN) powders were synthesized through microwave sintering using TiH2, Al, and TiN powders as raw materials. X-ray diffraction (XRD), differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were adopted to characterize the as-prepared powders. It was found that the Ti2AlN powder prepared by the microwave sintering of the 1TiH2/1.15Al/1TiN mixture at 1250 °C for 30 min manifested great purity (96.68%) with uniform grain size distribution. The formation mechanism of Ti2AlN occurred in four stages. The solid-phase reaction of Ti/Al and Ti/TiN took place below the melting point of aluminum and formed Ti2Al and TiN0.5 phases, which were the main intermediates in Ti2AlN formation. Therefore, the present work puts forward a favorable method for the preparation of high-purity Ti2AlN powders.

Characterization of Zirconium Germanosilicide Formed by Solid State Reaction of ZR With Sil−xGex Alloys

1995 ◽  
Vol 402 ◽  
Author(s):  
Z. Wang ◽  
D. B. Aldrich ◽  
P. Goeller ◽  
R. J. Nemanich ◽  
D. E. Sayers
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Sheet Resistance ◽  
Solid State Reaction ◽  
Solid Phase ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Final Phase ◽  
The Stability

AbstractWe have investigated the electrical and structural properties of zirconium germanosilicide (Zr-Si-Ge) films formed during the Zr-Sil−xGex solid state reaction. Thin films of C49 Zr(Si1−xGex)2 were formed from the solid phase reaction of Zr and Si1−xGex bilayer structures. It was observed that Zr reacts uniformly with the Sil−xGex alloy and that C49 Zr(Si1−x Gex)2 is the final phase of the Zr-Si1−xGex, solid phase reaction (such tht y = x) for all compositions examined (x = 0.20, 0.33, and 0.50). The sheet resistance of the Zr(Si1−xGex)2 thin films were higher than the sheet resistance measured for ZrSi2 films. The stability of Zr(Sil−x Gex)2 in contact with Si1−Gex was investigated and no germanium segregation was detected in the Zr(Si1−xGex)2/Si1−Gex structures.

Fabrication and XRD Study of Lithium Silicate by Solid-State Reaction

2013 ◽  
Vol 833 ◽  
pp. 213-216 ◽  
Author(s):  
You Dong Cao ◽  
Jin Hu ◽  
Hua Tang ◽  
Yu Tian Wang ◽  
Wei Jun Zhang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Lithium Silicate ◽  
Silicate Phase ◽  
Scanning Calorimetry ◽  
Paper Fabrication

At present, solid-state reaction, precipitation method and sol-gel method are applied to fabricate lithium silicate. Solid-state reaction has the advantage of short reaction time, simple process and less impurity phase in comparison with other method. So in this paper fabrication of lithium silicate by solid-state reaction was investigated systematically. Thermogravimetric analysis, differential scanning calorimetry and XRD analysis were carried out systematically in this paper. The reaction process and mechanism at different temperatures and the effects of the reaction temperature, Li:Si molar ratio and heat preservation time on the lithium silicate phase were discussed. Experimental results showed that the mixture were sintered at 900°C for 2h, there would have relatively high content of lithium silicate phase. And reunion is not serious that is benefit of grinding. While the Li:Si molar ratio was 4:1, there would have relatively high content of lithium silicate phase. While the Li:Si molar ratio was 5:1, the lithium silicate phase was severely agglomerated.

scholarly journals Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 330
Author(s):  
Hengli Xiang ◽  
Genkuan Ren ◽  
Yanjun Zhong ◽  
Dehua Xu ◽  
Zhiye Zhang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Solid Phase ◽  
Raw Materials ◽  
Phase Method ◽  
Maximum Adsorption Capacity ◽  
High Catalytic Activity ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
High Concentrations

Fe3O4@C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO4, FeS2, and PVP K30 as raw materials. The nanoparticles were utilized to decolorize high concentrations methylene blue (MB). The results indicated that the maximum adsorption capacity of the Fe3O4@C nanoparticles was 18.52 mg/g, and that the adsorption process was exothermic. Additionally, by employing H2O2 as the initiator of a Fenton-like reaction, the removal efficiency of 100 mg/L MB reached ~99% with Fe3O4@C nanoparticles, while that of MB was only ~34% using pure Fe3O4 nanoparticles. The mechanism of H2O2 activated on the Fe3O4@C nanoparticles and the possible degradation pathways of MB are discussed. The Fe3O4@C nanoparticles retained high catalytic activity after five usage cycles. This work describes a facile method for producing Fe3O4@C nanoparticles with excellent catalytic reactivity, and therefore, represents a promising approach for the industrial production of Fe3O4@C nanoparticles for the treatment of high concentrations of dyes in wastewater.

Microstructure and Mechanical Properties of ZrB2/h-BN Multiphase Ceramics by Low-Temperature Reactive Sintering

2016 ◽  
Vol 697 ◽  
pp. 510-514 ◽  
Author(s):  
Feng Rui Zhai ◽  
Ke Shan ◽  
Ruo Meng Xu ◽  
Min Lu ◽  
Zhong Zhou Yi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Relative Density ◽  
Fracture Strength ◽  
Solid Phase ◽  
Raw Materials ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Microstructure And Mechanical Properties ◽  
Multiphase Ceramics ◽  
Strength And Toughness

In the present paper, the ZrB2/h-BN multiphase ceramics were fabricated by SPS (spark plasma sintering) technology at lower sintering temperature using h-BN, ZrO2, AlN and Si as raw materials and B2O3 as a sintering aid. The phase constitution and microstructure of specimens were analyzed by XRD and SEM. Moreover, the effects of different sintering pressures on the densification, microstructure and mechanical properties of ZrB2/h-BN multiphase ceramics were also systematically investigated. The results show that the ZrB2 was obtained through solid phase reaction at different sintering pressures, and increasing sintering pressure could accelerate the formation of ZrB2 phase. As the sintering pressure increasing, the fracture strength and toughness of the sintered samples had a similar increasing tendency as the relative density. The better comprehensive properties were obtained at given sintering pressure of 50MPa, and the relative density, fracture strength and toughness reached about 93.4%, 321MPa and 3.3MPa·m1/2, respectively. The SEM analysis shows that the h-BN grains were fine and uniform, and the effect of sintering pressure on grain size was inconspicuous. The distribution of grain is random cross array, and the fracture texture was more obvious with the increase of sintering pressure. The fracture mode of sintered samples remained intergranular fracture mechanism as sintering pressure changed, and the grain refinement, grain pullout and crack deflection helped to increase the mechanical properties.

Needle-Like Mullite Ceramic Prepared by Sol-Gel Process

2011 ◽  
Vol 233-235 ◽  
pp. 2640-2643 ◽  
Author(s):  
Fu Sheng Song
Keyword(s):  
Powder Diffraction ◽  
Solid Phase ◽  
Raw Materials ◽  
Sol Gel ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Mullite Ceramic ◽  
X Ray ◽  
Sol Gel Process ◽  
Ceramic Blocks

Using tetraethoxysilane, aluminum nitrate and aluminum fluoride as raw materials, the precursor of mullite was prepared by sol-gel process. When the precursor sintered at 1200°C, mullite ceramic was obtained. Differential thermal analysis, X-ray powder diffraction and scanning electron microscope were used to characterize the dried mullite gel and ceramic blocks. The results suggest mullite is synthesized by solid-phase reaction mechanism. X-ray powder diffraction indicates mullite is the main crystals phase in the ceramic specimen. SEM micrograph shows the mullite grains in the shape of short rod with length of 20 um when sintered at 1200 °C for 2 h and the grains grown up to acicular with length of more than 50 um when the treating time under 1200 °C achieved to 4 h.

Hydrothermal Synthesis and Characterization of LiZr2(PO4)3

2012 ◽  
Vol 512-515 ◽  
pp. 195-198
Author(s):  
Jin Ye Niu ◽  
Zhi Wei Chen ◽  
Cheng Gong Sun ◽  
Liu Feng ◽  
Zheng Min Li ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Ph Value ◽  
Solid Phase ◽  
Low Cost ◽  
Reaction System ◽  
Xrd Analysis ◽  
Molar Ratio ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Hydrothermal Conditions

Lithium dizirconium phosphate (LiZr2(PO4)3) possesses good ionic conductivity owing to its unique framework structure and can be used as favorable anode material in Li-ion battery. LiZr2(PO4)3 is commonly prepared by solid phase reaction in which higher temperature is needed and pure LiZr2(PO4)3 without other phases is difficult to obtain in the final products. In this paper, low cost hydrothermal synthesis of pure (LiZr2(PO4)3) was studied. Effects of the hydrothermal conditions (molar ratios of Li+ to ZrOCl2, addition of HF, pH values of reaction system and hydrothermal temperatures) on the phase composition of the products were investigated. The results showed that pure LiZr2(PO4)3 was successfully prepared at lower temperature of 80°C for 24h with the addition of HF when the pH value was adjusted to 5.0 and the molar ratio of Li+ to ZrOCl2 was 0.5 with the concentration of ZrOCl2 as 0.6mol/L. The phases and purity of the final products were characterized by XRD analysis.

Luminescence properties of Eu2+ and Sm3+ co-doped in KBaPO4

2021 ◽  
Vol 40 (1) ◽  
pp. 389-396
Author(s):  
Yingwei Xu ◽  
Tingting Zhang ◽  
Li Zheng ◽  
Ailing Zou
Keyword(s):  
Solid Phase ◽  
Xrd Analysis ◽  
Rare Earth Ions ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Fluorescence Measurements ◽  
Xrd Patterns ◽  
Co Doped

Abstract KBaPO4:Eu2+/Sm3+ phosphor was synthesized via the high-temperature solid-phase reaction method. The structural properties, surface morphology, and optical properties of the synthesized samples were obtained by the X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and fluorescence measurements. The XRD patterns indicate that the crystal structure of KBaPO4 has not been changed by co-doped with two rare-earth ions. Under the excitation of 400 nm, the Eu2+ and Sm3+ co-doped KBaPO4 phosphors showed typical emission peaks at 430 (blue), 562 (yellow), and 600 nm (red). Meanwhile, with the increase of the Sm3+ content, the photoluminescent (PL) emission intensity of Sm3+ increased until the content reaches 0.12. However, the PL intensity of Eu2+ ions gradually decreased, which indicated that there was a possible energy transfer between the two ions. Therefore, the obtained results indicated that Eu2+/Sm3+ co-doped KBaPO4 is a promising phosphor for the use in white light-emitting diodes with near ultraviolet chips.

The Synthesis and the Thermal Properties of CaZr4(PO4)6 Materials

2013 ◽  
Vol 341-342 ◽  
pp. 69-73
Author(s):  
Long Su ◽  
Wan Mei Sui ◽  
Yu Jie Liu
Keyword(s):  
Thermal Expansion ◽  
Relative Density ◽  
Phase Structure ◽  
Solid Phase ◽  
Raw Materials ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Thermal Expansion Property ◽  
Thermal Expansion Coefficients ◽  
Low Thermal Expansion

CaZr4(PO4)6 ceramics were prepared with solid reaction of two-steps method. CaZr4(PO4)6 powders were synthesized by solid-phase reaction with Ca (OH)2, ZrO2 and (NH4)2HPO4 as raw materials. Then the powders precursor were sintered to CaZr4(PO4)6 ceramics with single phase structure at 1400°C for 8 hours. The relative density was measured, the phase structure of the materials synthesized at different temperatures and the average coefficients of thermal expansion were investigated. The results showed that the relative density of CaZr4(PO4)6 ceramics sintered at 1400°C was 93%. The average thermal expansion coefficients was 1.8×10-6/°C from 25°C to 1400°C. The CaZr4(PO4)6 ceramics obtained possesses low thermal expansion property in a broad range of temperatures.

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