scholarly journals Fabrication of Porous TiVAlC Ceramics with Low-Temperature Reactive Synthesis Method

2021 ◽  
Author(s):  
Haoran Zou ◽  
Xide Li ◽  
Chuo Zhang ◽  
Yi Wen ◽  
Yiquan Fan ◽  
...  
Keyword(s):  
Pore Size ◽  
Permeability Coefficient ◽  
Volume Expansion ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Synthesis Method ◽  
Size Variation ◽  
Expansion Ratio ◽  
Raw Material ◽  
Mixed Powder

Abstract Using the mixed powder of TiH2, V, Al and graphite as raw materials, porous TiVAlC ceramics were successfully prepared with the reaction synthesis method at only 1300℃. The pore-formation mechanism in the sintering process is discussed by combining XRD, pore size variation and sintering temperature. The formation of pores is mainly based on the following processes: (i) During the green compaction pressing, the pores formed by the gaps among the raw material powder particles; (ii) Stearic acid is completely decomposed at 500℃; (iii) TiH2 is completely decomposed at 700°C; (iv) Molten aluminum reacts with titanium and vanadium at 700℃ to generate titanium-aluminum and vanadium-aluminum compounds; (v) With the sintering temperature varying from 900℃ to 1100°C, excess titanium, vanadium and graphite generate a large amount of carbides (TiC, VC, TiVC2); (vi) Ti-Al and V-Al compounds react with carbides (TiC, VC, TiVC2) to form the final product TiVAlC at 1300℃.The effects of the sintering temperature on the volume expansion ratio, porosity, pore size and viscous permeability coefficient of porous TiVAlC ceramics were investigated. The results illustrated that the porosity, volume expansion rate and viscous permeability coefficient increased with the increase of sintering temperature from 700℃ to 1300℃, whereas the pore diameter first decreased from 6.2 μm to 5.0 μm, and then increased to 10.2 μm.

Use of Sugarcane Bagasse Ashes as Raw Material in the Replacement of Fluxes for Applications on Porcelain Tile

2016 ◽  
Vol 881 ◽  
pp. 383-386 ◽  
Author(s):  
Raimundo J.S. Paranhos ◽  
Wilson Acchar ◽  
Vamberto Monteiro Silva
Keyword(s):  
Mechanical Properties ◽  
Environmental Impact ◽  
Physical Properties ◽  
Sugarcane Bagasse ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Raw Material ◽  
The Cost ◽  
Potential Use ◽  
Porcelain Tile

This study evaluated the potential use of Sugarcane Bagasse Ashes (SBA) as a flux, replacing phyllite for the production of enamelled porcelain tile. The raw materials of the standard mass components and the SBA residue were characterized by testing by XRF, XRD, AG, DTA and TGA. Test samples were fabricated, assembled in lots of 3 units and sintered at temperatures of 1150 ° C to 1210 ° C. The results of the physical properties, mechanical properties and SEM of the sintered samples, showed that the formulation, G4 - in which applied 10% of SBA replacing phyllite, sintering temperature 1210 ° C showed better performance as the previously mentioned properties due to the formation of mullite crystals, meeting the prerequisites of standards for enamelled porcelain tile, while reducing the environmental impact and the cost of production.

Microstructure, Mechanical Properties, and Electrical Resistivities of Mica Glass-Ceramics with Flake Phlogopite and Waste Glass

2014 ◽  
Vol 602-603 ◽  
pp. 640-643
Author(s):  
Yu Fei Chen ◽  
Yan Gai Liu ◽  
Xiao Wen Wu ◽  
Zhao Hui Huang ◽  
Ming Hao Fang
Keyword(s):  
High Speed ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Glass Ceramics ◽  
Waste Glass ◽  
Raw Material ◽  
Bending Test ◽  
Electric Locomotive ◽  
Molding Process ◽  
Electrical Resistivities

Mica glass-ceramics can be applied in all kinds of electrical equipment, locomotive internal circuits in high-speed rail, ordinary electric locomotive and subway locomotive. In this study, mica glass-ceramics were prepared by sintering process using flake mica and waste glass as the main raw material with low cost. Different mica glass-ceramic samples were fabricated by changing the formula of raw materials, molding process and sintering temperature. X-ray diffraction, scanning electron microscopy, three-point bending test, and balanced-bridge technique were applied to investigate the phase, microstructure, mechanical and electrical resistivities of the samples, respectively. The results show that the optimum sintering temperature is 900 to 1000 °C holding for two hours, the desirable ratio is 70 wt% of mica powder while 30 wt% of glass powder. In that condition the sample could be less porosity, high flexural strength (63.3 MPa) and eligible electrical resistivity (0.4×1013 Ω·cm).

Effect of High Temperature Process on Microstructure and Properties of Industrial Steel Slag Cement

2019 ◽  
Vol 814 ◽  
pp. 413-418
Author(s):  
Fang Wang ◽  
Ming Han Xu ◽  
Rui Hua Wang ◽  
Chao Yang ◽  
Ai Xia Chen ◽  
...  
Keyword(s):  
Steel Industry ◽  
High Performance ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Steel Slag ◽  
Holding Time ◽  
Raw Material ◽  
Experimental Comparison ◽  
Slag Cement ◽  
Actual Performance

The construction industry continues to develop and the requirements for cement performance are getting higher and higher. At the same time, in the steel industry, the discharge of steel slag is also increasing. The effective reuse of steel slag has become a prominent problem in the steel industry. . Therefore, it is envisaged to use steel slag as a raw material for the cement production process to produce cement and to produce high-performance cement. The main raw materials of this experiment are steel slag, limestone, sandstone and shale. Through the cement preparation process, the cement is made, and then the cement is made into concrete to test its performance. This experiment mainly studies the sintering temperature and holding time variable. In the experimental test, the analysis and comparison were carried out in five aspects of the degree of macroscopic cracking, particle size, density, microstructure and composition. In the comparison experiment of sintering temperature, with the increase of temperature, the flexural and compressive properties of cement gradually increased. In this test, 1200 °C is the most suitable temperature for the performance of the cement. Through the experimental comparison of different holding time, it is known that with the prolonging of the holding time, the microstructure and actual performance of the cement are continuously enhanced. Comprehensive consideration: the ratio of steel slag in cement ratio is 10%, sintering temperature is 1200 °C, and heat preservation is 2h. The steel slag cement prepared under this condition has the strongest performance.

Study on Structure and Properties of Porous Copper Alloy

2013 ◽  
Vol 833 ◽  
pp. 301-304
Author(s):  
Hao Zhong ◽  
Yun Zhou
Keyword(s):  
Compressive Strength ◽  
Relative Density ◽  
Pore Size ◽  
Alloy Powder ◽  
Sintering Temperature ◽  
Raw Material ◽  
Structure And Properties ◽  
Pore Former ◽  
Porous Copper ◽  
Increasing Trend

CuSn6Zn6 alloy powder and a pore former were used as raw material. Porous bronze was successfully prepared by the sintering and dissolution process (SDP). The porosity is in range of 76%~88%, and the pore size is in range of 0.8~3.3mm. The effect of the porosity and cell sizes of specimens on its mechanical property was investigated, and the effect of sintering temperature on its relative density and porosity was also studied. The experimental results indicate that under the condition of the same pore size, the compressive strength decreases with the increase of porosity, the compressive strength changes from 10Mpa to 2Mpa with the porosity from 76% to 88%; under the same porosity condition, the compressive strength does not change significantly with the pore size, but it has a slightly increasing trend with the decrease of the pore size. The relative density of the specimens increases with the increase of the sintering temperature.

scholarly journals The Aesthetic and Plastic Values for the Concept of Synthesis through the Ages and the Variables of Material and Designing the Hanging Textile

2020 ◽  
Vol 9 (4) ◽  
pp. 281
Author(s):  
Nahla Ahmed Hamdy El-Deeb
Keyword(s):  
Raw Materials ◽  
Synthesis Method ◽  
Research Problem ◽  
Pop Art ◽  
Raw Material ◽  
New Method ◽  
Textile Materials ◽  
Ancient Egyptian ◽  
The Aesthetic ◽  
Artistic Values

Synthesis means intermarriage and compatibility between more than one raw material in a single artwork. Interacting with its various properties and sources to reach a balance between expressive and technical aspects within the framework of the technical and technical capabilities of that raw material. By adding raw materials, they are woven with textured structures or by the new method developed through the art of gluing or collage and the art of assembly through deletion and addition within the scope of plastic treatments of the textile surface or by using both the traditional and the new method combined to merge between Woven materials and added media on the surface of the artwork. The research deals with synthesis through the ages (the ancient Egyptian - Coptic - Islamic - popular) and some schools of modern art (Cubism - Dada - Pop Art) and some pioneers in plastic art in Egypt (Munir Kanaan - Ahmed Nawar - Farghali Abdul Hafeez - Zainab Sabra). Research Problem: - To what extent can the aesthetic and plastic values ​​be benefited from the different treatments of natural and synthetic textile materials for the concept of synthesis? Research Aims: - Revealing the aesthetic, plastic, and artistic values ​​of the synthesis method throughout the ages to find new approaches to teaching manual fabric. - Create innovative aesthetic values ​​and formulations on the surface of the tissue sphere. The current research provides a program consisting of 3 teaching entrances that depend on a number of key and sub-concepts proposed for the concept of synthesis through art education. Keywords: The Aesthetic - Plastic Values - The Concept of Synthesis – Variables of Material and designing - Hanging Textile

Large-Scale Fabrication of Ti3AlC2 Powder with High-Purity

2007 ◽  
Vol 336-338 ◽  
pp. 948-951
Author(s):  
Chang An Wang ◽  
Chun Qing Peng ◽  
Yang Song ◽  
Yong Huang
Keyword(s):  
Particle Size ◽  
High Purity ◽  
Mass Production ◽  
Large Scale ◽  
Raw Materials ◽  
Synthesis Method ◽  
Particle Size Analysis ◽  
Raw Material ◽  
Size Analysis ◽  
Sem Observation

A synthesis method of high-pure Ti3AlC2 powder with a large scale was presented as pressureless synthesis using TiC, Ti and Al powders as starting materials at 1300~1450°C in flow Ar. The different raw material scales were tested from 2 g to 1.0 kg, and the results showed that the purities of Ti3AlC2 powders could be kept around 97 wt% at different scales of raw materials. SEM observation and particle size analysis revealed that the synthesized Ti3AlC2 powders were uniform and around 5 μm in particle size. This method can be used for mass production of Ti3AlC2 powders with high-purity.

Effect of Fly Ash Pre-Sintering Temperature on Adiabatic Foam Fabricated by Sodium Silicate

2019 ◽  
Vol 295 ◽  
pp. 105-109
Author(s):  
Ye Li ◽  
Heng Ze Zhao ◽  
Xu Dong Cheng
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Fly Ash ◽  
Pore Structure ◽  
Pore Size ◽  
Sodium Silicate ◽  
Sintering Temperature ◽  
Raw Material ◽  
Sintering Process ◽  
Spherical Pore

Adiabatic foam was fabricated successfully using sodium silicate as the raw material with pre-sintered fly ash as additive. Fly ash was pre-sintered at 500 to 900 oC and the effect of the pre-sintering temperature on the performance, including the thermal conductivity, density, compressive strength and microstructure, was researched. The results show that the pre-sintering process effectively reduces the density of the samples while the thermal conductivity and compressive strength are higher than those of the samples fabricated by the fly ash without being pre-sintered. Moreover, the samples exhibit tri-modal spherical pore structure with macropores and mesopores. The pore size remains unchanged until the pre-sintering temperature exceeds 700 oC, and then starts to increase.

Study on Preparation of Ceramic Material and its Properties

2014 ◽  
Vol 686 ◽  
pp. 57-60
Author(s):  
Ya Li Liu
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Porous Ceramic ◽  
High Strength ◽  
Porous Ceramics ◽  
Raw Material ◽  
High Porosity

This paper introduces the classification, properties and application of porous ceramic materials, reviewed preparation of porous ceramics. Taking fly ash and red mud as the main raw material to generate porous ceramics, the paper study the influence of different proportions of raw materials, sintering temperature, porosity of porous ceramic sample rate, bending strength, and microstructure. The results show that, fly ash and red mud proportioning and sintering temperature are the main factors that influence the structure and properties of samples. The 4# sample is a kind of high porosity and high strength quality of porous ceramics.

Manganese Sulphate Fertilizer Potential as Raw Material of LMR-NMC Lithium-Ion Batteries: A Review

2021 ◽  
Vol 1044 ◽  
pp. 59-72
Author(s):  
Affiano Akbar Nur Pratama ◽  
Ahmad Jihad ◽  
Salsabila Ainun Nisa ◽  
Ike Puji Lestari ◽  
Cornelius Satria Yudha ◽  
...  
Keyword(s):  
Sintering Temperature ◽  
Specific Capacity ◽  
Synthesis Method ◽  
Lithium Ion ◽  
Raw Material ◽  
Li Ion Battery ◽  
Cycle Stability ◽  
Manganese Sulphate ◽  
Structure Synthesis ◽  
Li Ion

Lithium-ion battery (Li-ion) is an energy storage device widely used in various types of electronic devices. The cathode is one of its main components, which was developed because it accelerates the transfer of electrons and battery cycle stability. Therefore, the LiNixMnyCozO2 (LNMC) cathode material, which has a discharge capacity of less than 200 mAh g−1, was further developed. Li-Mn-rich oxide cathode material (LMR-NMC) has also received considerable attention because it produces batteries with a specific capacity of more than 250 mAh g−1 at high voltages. The structure, synthesis method, and sintering temperature in the fabrication of LMR-NMC cathode materials affect battery performance. Furthermore, manganese sulphate fertilizer replaces manganese sulphate as raw material for LMR-NMC cathode due to its lower price. The method used in this study was implemented by reviewing previous literature related to Li-ion batteries, Li-ion battery cathodes, synthesis of LMR-NMC cathode materials, and the potential of manganese fertilizers. This review aims to find out the effect of structure, synthesis method, and sintering temperature on LMR-NMC cathodes made from manganese sulphate fertilizer to obtain a Li-ion battery with a high specific capacity, more environmentally friendly, has good cycle stability, and a high level of safety and lower production costs.

Preparation of plate-like α-Al2O3 particles in Na2SO4 flux using kaolin as the starting material

Clay Minerals ◽  
2010 ◽  
Vol 45 (4) ◽  
pp. 503-506 ◽  
Author(s):  
Tan Hongbin
Keyword(s):  
Mechanical Properties ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Low Cost ◽  
Production Method ◽  
Sodium Sulphate ◽  
Raw Material ◽  
Mullite Phase ◽  
Sodium Aluminosilicate ◽  
Α Al2o3

AbstractPlate-like α-Al2O3 particles are used to reinforce metal or ceramics to improve their mechanical properties. Here, we have demonstrated the production of alumina platelets using kaolin as a raw material in a sodium sulphate flux. When kaolin was sintered using Na2SO4 flux, the main phase formed in samples sintered at 900ºC was mullite, but alumina was produced at 1000ºC. Sintering at 1200ºC led to alumina and sodium aluminosilicate, with little of the mullite phase present. Plate-like α-Al2O3 particles were observed in samples sintered at 1200ºC, with diameters ranging from 1.5 to 4.5 µm and thicknesses from 0.05 to 0.1 µm. This production method is economically feasible because the raw materials have a low cost and the sintering temperature is low.

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