Preparation and Characterization of ß-Tricalcium Phosphate via Wet Mechanochemical Treatment

2008 ◽  
Vol 368-372 ◽  
pp. 1166-1168 ◽  
Author(s):  
Tao Yu ◽  
Jian Dong Ye
Keyword(s):  
Tricalcium Phosphate ◽  
Raw Materials ◽  
Low Cost ◽  
Synthesis Method ◽  
Particle Diameter ◽  
Mechanochemical Treatment ◽  
Mechanochemical Reaction ◽  
Ftir Analysis ◽  
Hydrogen Phosphate

In this work, a simple, reproducible and low-cost synthesis method for the preparation of ß-tricalcium phosphate (ß-TCP) was developed. ß-TCP was prepared via wet mechanochemical treatment using calcium oxide and calcium hydrogen phosphate as raw materials. XRD and FTIR analysis indicated that the as-treated precursor was non-stoichiometric, poorly-crystallized carbonated hydroxyapatite (CHA) resulting from the mechanochemical reaction, and the crystalline ß-TCP powder was obtained by calcining the precursor at 800°C for 2 hours. SEM observation showed that the addition of surfactants could eliminate the agglomeration of the powder and well-dispersive ß-TCP powder with a particle diameter between 0.1 and 2.0 2m can be obtained.

Production and characterization of biosurfactant from marine bacterium Inquilinus limosus KB3 grown on low-cost raw materials

2013 ◽  
Vol 63 (4) ◽  
pp. 1327-1339 ◽  
Author(s):  
Atipan Saimmai ◽  
Satianpong Udomsilp ◽  
Suppasil Maneerat
Keyword(s):  
Marine Bacterium ◽  
Raw Materials ◽  
Low Cost

scholarly journals Chemical and Biological Investigation of Organic Wastes of Frying Oils and Beef Fats: Valorization for Biodiesel Production

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Yasmine Souissi ◽  
Meha Alouini ◽  
Wissem Mnif
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Methyl Esters ◽  
Organic Wastes ◽  
Biodiesel Production ◽  
Biological Investigation ◽  
Frying Oils ◽  
Enzymatic Transesterification ◽  
Different Sources

The present study investigates the different approaches of biodiesel production by exploiting low cost feedstocks such as organic wastes of frying oils (WFO) and wastes of beef fats (WBF). The aim was to compare not only two different sources of waste raw materials but also different approaches of biodiesel production. Biodiesel which refers to fatty acid methyl esters (FAME) was produced by both chemical and enzymatic transesterification. The characterization of the biodiesel produced by both approaches was performed according to the European standard EN 14214. The results showed that the biological method gave a richer FAME biodiesel through the catalysis of whole-cell lipase. However, for the chemical method, better biodiesel physicochemical properties were observed for the two raw materials. Therefore, it would be interesting to compromise by optimizing the biological biodiesel production approach in order to obtain a better quality in coherence with EN 14214 requirements.

Preparation and characterization of low-cost high-performance mullite-quartz ceramic proppants for coal bed methane wells

2018 ◽  
Vol 25 (5) ◽  
pp. 957-961 ◽  
Author(s):  
Kaiyue Wang ◽  
Huijun Wang ◽  
Yi Zhou ◽  
Guomin Li ◽  
Yaqiao Wu ◽  
...  
Keyword(s):  
High Performance ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Low Cost ◽  
Quartz Ceramic ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Sintering Process ◽  
Flow Mechanism

AbstractIn this study, the mullite-quartz-based proppants were successfully prepared by using the coal gangue as the raw materials. Then, the effects of the additive and the sintering temperature on the composition, microstructure, and properties of the proppants were investigated. Results showed that the proppants sintered at 1250°C with the 10 wt% bauxite additive presented the best performance, which was very close to that of the quartz-proppant, and met the operational requirements of the 52 MPa coal bed methane wells. The viscous flow mechanism of the liquid phase formed during the sintering process also promoted the arrangement of the grains, thus benefiting the densification and the strength of the proppants.

scholarly journals Micro-Structure Determines the Intrinsic Property Difference of Bio-Based Nitrogen-Doped Porous Carbon—A Case Study

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1765
Author(s):  
Yingfang Jiang ◽  
Yanxia Liu ◽  
Yagang Zhang ◽  
Yidan Chen ◽  
Xingjie Zan
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Raw Materials ◽  
Low Cost ◽  
Synthesis Method ◽  
Intrinsic Property ◽  
Nitrogen Doped ◽  
Surface Areas ◽  
Cottonseed Hull ◽  
And Performance

Biomass-derived porous carbon materials have drawn considerable attention due to their natural abundance and low cost. In this work, nitrogen-doped porous carbons with high nitrogen content and large surface areas were designed and prepared from cottonseed hull and cattail. The two plant-based biomass compositions are similar, but the structures are very different, generating distinctly different property and performance of the prepared carbon materials. NRPC-112 has good electrochemical properties, while CN800 has good adsorption properties. By comparing the microstructure differences between the two starting materials, it was found that the structure of the raw materials would significantly affect the properties and performance of the materials. The work provided an important theoretical basis and reference for the selection of bio-resources for preparing carbon material. It is also important for choosing the appropriate synthesis method, process optimization, and application scenarios.

Influence of Nitrogen Pressure and TiN Addition on Combustion Synthesis of Ti2AlN Powders

2012 ◽  
Vol 624 ◽  
pp. 5-8
Author(s):  
Jia Jin Tian ◽  
Feng Rui Zhai ◽  
Li Li Zhang ◽  
Hong Wei Zhang ◽  
Zhong Zhou Yi
Keyword(s):  
Combustion Synthesis ◽  
Raw Materials ◽  
Low Cost ◽  
Synthesis Method ◽  
Nitrogen Compound ◽  
Combustion Method ◽  
Nitrogen Pressure ◽  
Small Sample ◽  
Optimum Process ◽  
Xrd Diffraction

It has a relatively rapid reaction with self-propagating combustion method to synthesize Ti-Al-N powder. This can effectively avoid uneven phenomenon of aluminum melting reunion during the reaction of raw materials. So you can use lower-cost aluminum as raw materials. In addition, the combustion synthesis method also has a simple process and low-cost advantage. Thus this method has the potential to become the optimum process method to prepare Ti2AlN and Ti4AlN3. In this paper, Ti, Al elemental powders and N2 were used as raw materials. The powder of Ti2AlN was successfully prepared for the first time by combustion synthesis method. This substance is a nitrogen compound of single-phase and three yuan. The results from the XRD diffraction analysis and SEM show that synthetic product is high purity Ti2AlN with a small sample to combustion synthesis when the pressure of nitrogen is in 5 MPa, but the content of synthesis products Ti2AlN is small when the sample is magnified, and the TiN and AlN has a higher content. It can burn synthetic Ti2AlN to control the nitrogen pressure and add the amount of TiN, and the pressure of N2 is better 2 MPa, and the amount of TiN added is better 30 wt.%.

Characterization of a Water Clearing Treatment Residue and Its Application as Clay Ceramic Addition

2014 ◽  
Vol 775-776 ◽  
pp. 642-647
Author(s):  
Carolina Nascimento de Oliveira ◽  
Michelle Pereira Babisk ◽  
Fernando Vernilli ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro ◽  
...  
Keyword(s):  
Raw Materials ◽  
Rupture Strength ◽  
Low Cost ◽  
Treatment Plant ◽  
Linear Shrinkage ◽  
Red Clay ◽  
Steel Making ◽  
Important Residue ◽  
Clay Ceramics

The addition of industrial residues into common red clay ceramic has been, from many decades, an alternative of using other low cost raw materials and, more recently, as an environmentally correct destination for polluting substances. An important residue, known as yellow sludge, is that generated at the water clearing stage (WCS) of a treatment plant by some heavy industries such as an integrated steel making. Since this yellow sludge residue is normally disposed in ways that pollutes water bodies, the objective of the present work was to characterize a WCS yellow sludge and investigate its addition into clay ceramics. The residue was characterized by X-ray fluorescence, particle size distribution and scanning electron microscopy. The addition was carried out up to 7.5 wt% followed by firing at 800oC. The added ceramics were evaluated in terms of water absorption, linear shrinkage, dry apparent density and flexural rupture strength. It was found that the residue addition does not practically alter the ceramic technical properties.

Preparate and Properties on Rare Earth PVA Complex Nanofibers

2014 ◽  
Vol 894 ◽  
pp. 332-335
Author(s):  
Di Zhang ◽  
Qing Shan Li ◽  
Li Jiao Zhao
Keyword(s):  
Composite Nanofibers ◽  
Single Phase ◽  
Raw Materials ◽  
Low Cost ◽  
Impact Resistance ◽  
Synthesis Method ◽  
Research Field ◽  
Uniform Size ◽  
Research Directions ◽  
Potential Applications

Nanofiber is an important part in nanomaterials research field, and the polymer nanofibers is one of the important research directions. RE, which has unique electronic structure, the optical, electrical and magnetic aspects of the special nature, combine with the polymer, that has rich raw materials, simple synthesis method, easy processing, high impact resistance, light weight and low cost advantages, to get a new kind materials of practical uses and potential applications. This topic was prepared PVA/Sm (NO3)3composite nanofibers using an electrostatic spinning, and the PVA/Sm (NO3)3nanofibers were treated at an appropriate temperature to obtain Sm2O3nanofibers. Samples were characterized and analyzed by the SEM, FTIR, XRD, TG-DTA and other modern means. The results show that the surface of PVA/Sm (NO3)3composite fibers is smooth, uniform size and amorphous. Sm (NO3)3is not interact with the PVA groups, and the diameter of fiber is 200nm. After firing, the diameter of fibers was reduced to 100nm. PVA, Sm (NO3)3and the water are completely decomposed at 600°C or more, finally obtained Sm2O3 nanofibers of single-phase crystalline state.

scholarly journals Synthesis of nearly spherical AlN particles by an in-situ nitriding combustion route

2021 ◽  
Vol 10 (2) ◽  
pp. 291-300
Author(s):  
Zhilei Wei ◽  
Kang Li ◽  
Bangzhi Ge ◽  
Chaowei Guo ◽  
Hongyan Xia ◽  
...  
Keyword(s):  
Particle Size ◽  
Combustion Temperature ◽  
High Efficiency ◽  
Raw Materials ◽  
Low Cost ◽  
Synthesis Method ◽  
Preparation Methods ◽  
Average Size ◽  
Micrometer Size

AbstractSpherical AlN powders with micrometer size have attracted great attention owing to their good fluidity and dispersity. However, the industrial preparation methods usually require high temperature and long soaking time, which lead to the high cost and limit the wide application of the products. Herein, nearly spherical AlN particles with the average size of 2.5 µm were successfully synthesized via an in-situ combustion synthesis method. The effect of N2 pressure, NH4Cl content, and Al particle size on the combustion reaction procedure, phase composition, and microstructure of the products was systematically investigated. The results showed that the decreased N2 pressure, increased NH4Cl content, and Al particle size led to the decreasing of combustion temperature and speed, which further affected the morphology of the products. As a result, low N2 pressure (0.2 MPa), a small amount of NH4Cl (0.5 wt%), and fine Al particles (∼2.5 µm) contributed to a moderate combustion temperature and facilitated the formation of nearly spherical AlN particles. In addition, based on the gas-releasing assisted quenching experiments and thermo-kinetic analysis, a two-step growth mechanism for the nearly spherical AlN particles was rationally proposed. The present method shows the advantages of low cost and high efficiency for preparing nearly spherical AlN particles, which can be used as raw materials for electronic substrates and fillers for packaging materials.

scholarly journals Sintesis dan Kararkterisasi Modifikasi Mikropartikel Magnetit (Fe3O4) Dalam Pemanfaatan Karat dengan Ekstrak Daun Ilalang (Imperata Cylindrica L)

2020 ◽  
Vol 2 (2) ◽  
pp. 51-55
Author(s):  
Annisaa Siti Zulaicha ◽  
Iwan Syahjoko Saputra ◽  
Indah Puspita Sari ◽  
Dicky Annas
Keyword(s):  
Leaf Extract ◽  
Functional Group ◽  
Synthesis Method ◽  
Imperata Cylindrica ◽  
Wave Number ◽  
Ftir Analysis ◽  
Eds Analysis ◽  
Magnetite Fe3o4 ◽  
The Mean

The synthesis of magnetite (Fe3O4) microparticles has been successfully carried out using rust and leaf extract of grass (Imperata cylindrica L). The purpose of this research is the synthesis and characterization of Fe3O4 microparticles using the Green Synthesis method. The UV-Vis results showed that the absorption peak was at a wavelength of 273 nm with an absorbance value of 0.75. FTIR analysis shows the shift of the peak at wave number 3356 cm-1 to 3290 cm-1 and the appearance of a new peak at wave number 500 cm-1 which is characteristic of the Fe-O-Fe functional group and indicates the formation of Fe3O4 microparticles. XRD results showed six specific peaks, which were crystallinity of Fe3O4 microparticles at position 2 theta 30.40 °, 35.70 °, 43.30 °, 53.80 °, 57.40 °, and 63.00 °. PSA analysis showed that the mean particle size was > 100 nm, and the PZC results showed a zeta potential of 20 mV. SEM results showed the morphology of Fe3O4 microparticles with 1000x magnification, and EDS analysis results showed Fe and O's elemental composition.

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