Synthesis of Ni0.6Cu0.4Fe2O4 Ferrite Fine Powder Using Egg White Method

2014 ◽  
Vol 492 ◽  
pp. 253-257 ◽  
Author(s):  
Lei Wang ◽  
Zhi Dong Li ◽  
Yin Liang ◽  
Kun Yu Zhao
Keyword(s):  
Grain Size ◽  
Sintering Temperature ◽  
Fine Powder ◽  
Egg White ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
Soaking Time ◽  
X Ray ◽  
Synthesis Conditions ◽  
Metal Nitrates

Polycrystalline ferrites powders samples: Ni0.6Cu0.4Fe2O4 were synthesized by using metal nitrates and freshly extracted egg white, all the samples were sintered at 500°C,520°C, 550°C, 580°C and 600°C for 3h,6h,9h, respectively. The better synthesis conditions were investigated by analyzed the effect of sintering temperature and soaking time on structural, grain size and magnetic properties using X-ray diffraction (XRD), laser grain size analyzer (LPSA) and vibrating sample magnetometer (VSM). From the above analysis, the better synthesis conditions is set two insulation work steps: First at 240°C for 1h, then heating to 440°C for 2h, finally sintering at between 520°C and 550°C for 6h.

Study on the Properties of Doped La in BaBi4Ti4O15 Ceramic

2007 ◽  
Vol 26-28 ◽  
pp. 243-246
Author(s):  
Xing Hua Yang ◽  
Jin Liang Huang ◽  
Xiao Wang ◽  
Chun Wei Cui
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sintering Temperature ◽  
Solid Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lanthanum Content ◽  
Scanning Electron

BaBi4-xLaxTi4O15 (BBLT) ceramics were prepared by conventional solid phase sintering ceramics processing technology. The crystal structure and the microstructure were detected by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD analyses show that La3+ ions doping did not change the crystal structure of BBT ceramics. The sintering temperature increased from 1120°C to 1150°C with increasing Lanthanum content from 0 to 0.5, but it widened the sintering temperature range from 20°C to 50°C and refined the grain size of the BBT ceramic. Additionally, polarization treatment was performed and finally piezoelectric property was measured. As a result, the piezoelectric constant d33 of the 0.1at.% doped BBLT ceramics reached its highest value about 22pc/N at polarizing electric field of 8kV/mm and polarizing temperature of 120°C for 30min.

scholarly journals Influence of different synthesis conditions on properties of oleic acid-coated-Fe3O4 nanoparticles

2015 ◽  
Vol 33 (1) ◽  
pp. 100-106 ◽  
Author(s):  
Atieh Aliakbari ◽  
Majid Seifi ◽  
Sharareh Mirzaee ◽  
Hoda Hekmatara
Keyword(s):  
Oleic Acid ◽  
Room Temperature ◽  
Magnetic Measurement ◽  
Precursor Solution ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Conditions ◽  
Transmission Electron ◽  
Ft Ir

AbstractIn the present paper, iron oxide nanoparticles coated by oleic acid have been synthesized in different conditions by coprecipitation method. For investigating the effect of time spent on adding the oleic acid to the precursor solution, two different processes have been considered. The as synthesized samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR). Magnetic measurement was carried out at room temperature using a vibrating sample magnetometer (VSM). The results show that the magnetic nanoparticles decorated with oleic acid decreased the saturation of magnetization. From the data, it can also be concluded that the magnetization of Fe3O4/oleic acid nanoparticles depends on synthesis conditions.

Synthesis and Characterization of Nanocrystalline PZT Powders by a Simple Sol-Gel Method

2012 ◽  
Vol 512-515 ◽  
pp. 147-152
Author(s):  
Shao Peng Zhang ◽  
Xiao Hui Wang ◽  
Long Tu Li
Keyword(s):  
Grain Size ◽  
Lead Zirconate Titanate ◽  
Sintering Temperature ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Average Grain Size

Nanocrystalline lead zirconate titanate (PZT) powders with composition at the morphotropic phase boundary (MPB) were synthesized by a simple aqueous based sol-gel method, using lead nitrate, zirconium nitrate and tetrabutyl titanate as the starting materials. The sol could be easily transformed into gel, firstly heated at 120°C for 10h, then at 180°C for 24h. The thermal decomposition process of the gel was investigated by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. The effect of citrate addition amount on the calcining temperature was discussed. The results reveal that pure perovskite phase PZT powders can be obtained at a calcining temperature as low as 600°C. The average grain size of the powders was determined by transmission electron microscope and X-ray diffraction. The influences of calcining temperature and the pH value of the solution on the grain size were investigated. The sintering temperature and electrical properties of the ceramics derived by nano-powders were compared with those prepared by the conventional ceramic processing. The result shows that using the nanopowder, the sintering temperature could be reduced by about 100°C and the ferroelectric properties were enhanced.

The Effect of Sintering Temperature on the Sintered Mg/3wt.%Zn-Bioglass (45S5) Composites

2015 ◽  
Vol 819 ◽  
pp. 325-330
Author(s):  
Noorazimah Ab Llah ◽  
Shamsul Baharin Jamaludin ◽  
Zuraidawani Che Daud
Keyword(s):  
Grain Size ◽  
Sintering Temperature ◽  
Xrd Analysis ◽  
Good Combination ◽  
Crystalline Compound ◽  
X Ray Diffraction ◽  
Bioactive Materials ◽  
Xrd Pattern ◽  
X Ray ◽  
Optical Micrograph

Magnesium and bioglass are a good combination to create biocompatible and bioactive materials. Magnesium-bioglass composites can be manufactured by casting or sintering. This work was aimed to manufacture the composite Mg-3wt.%Zn filled with 5, 10, 15, 20, 25 and 30wt.% bioglass (45S5) by powder metallurgy. Two sintering temperatures of 450 °C and 550 °C were used to sinter the samples. The sintered samples were characterized using optical micrograph and X-Ray diffraction (XRD). Optical micrograph shows that increasing of bioglass content lead to smaller grain size. XRD analysis shows no new crystalline compound detected on XRD pattern for Mg-3wt%Zn sintered at 450 °C ad 550 °C.

Fabrication and Mechanical Properties of High-Pure Ti3SiC2 Bulk Materials Directly by Hot-Pressing its Powder

2007 ◽  
Vol 336-338 ◽  
pp. 958-960
Author(s):  
Yang Song ◽  
Chang An Wang ◽  
Chun Qing Peng ◽  
Yong Huang
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Sintering Temperature ◽  
Argon Atmosphere ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
Bulk Materials ◽  
Soaking Time ◽  
X Ray ◽  
Microstructure Evaluation

High-pure bulk Ti3SiC2 samples were fabricated by directly hot-pressing (HP) high-pure Ti3SiC2 powder without any additives at 1200°C to 1500°C for 0.5–2 hours in flow argon atmosphere. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used for phase identification and microstructure evaluation. The fabricated Ti3SiC2 materials have relative high density with high purity, flexural strength of 500-700MPa and fracture toughness of 9-12MPa·m1/2. The influence of sintering temperature and soaking time on the mechanical properties of Ti3SiC2 materials was discussed. The sintering mechanism for Ti3SiC2 powder without any additives was considered to be related with the fragile-ductile transformation of Ti3SiC2 at 1100°C.

Processing and Characterizations of Bi2O3/BaTiO3 Ceramic

2013 ◽  
Vol 802 ◽  
pp. 7-11 ◽  
Author(s):  
Wanwilai C. Vittayakorn ◽  
Dondanai Banjong ◽  
Naratip Vittayakorn
Keyword(s):  
Electron Microscopy ◽  
Grain Size ◽  
Single Phase ◽  
Sintering Temperature ◽  
Secondary Phase ◽  
Dielectric Characteristics ◽  
X Ray ◽  
Synthesis Conditions ◽  
Average Grain Size ◽  
Scanning Electron

The objective of this work is to provide the process for making BaTiO3-based ceramics by adding bismuth oxide (Bi2O3) into the system. The attention is also focused on synthesis conditions, where sintering temperature exhibits a pronounced effect on phase formation, density, microstructure and dielectric properties of BaTiO3 ceramics doped with different contents of Bi2O3 nanoparticles. The phases of BaTiO3-based ceramics have been prepared by solid state reaction using different Bi2O3 amount and characterized by X-ray diffractometry, Archimedes’s method, scanning electron microscopy and dielectric spectroscopy. The results show that single phase of BaTiO3 with no evidence of secondary phase forms in all samples. Abnormal grain growth was found in pure BaTiO3 ceramic with 37.30 µm of average grain size. After added Bi2O3 nanoparticles into system, the grain size significantly decreases and the sintering temperature of BaTiO3-based ceramics efficiently reduces without degrading the dielectric characteristics.

Preparation and Characteristic Development of Nano Zn2SiO4: Mn Green Phosphors by La2O3 Doping

2012 ◽  
Vol 512-515 ◽  
pp. 1520-1523
Author(s):  
Fann Wei Yang ◽  
Chien Min Cheng ◽  
Kai Huang Chen
Keyword(s):  
Grain Size ◽  
Grain Shape ◽  
Sintering Temperature ◽  
Main Principle ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
State Method ◽  
Sintering Conditions

In this experimental, solid state method is used to synthesize proportioned nano-ZnO and SiO2 powders into Zn2SiO4 phosphor, and to achieve better control on grain size and grain shape than traditional powder. La is used to replace Mn; and to achieve better control on grain size and grain shape than traditional powder. With different sintering conditions, With different sintering conditions, the effect of the luminescent intensity due to sintering temperature and the concentration of activator would be discussed by the X-Ray Diffraction, SEM and TEM were utilized in the characterization of phase purity and microstructure of phosphor particles. Photoluminescence (PL) spectroscopy was utilized to characterize the optical properties. This use of phosphor materials is the application of the main light source, display components. Therefore, our study zinc silicate as the main principle of doping Mn, La of the characteristics of, expects to find the best glow.

scholarly journals Effect of Microwave Calcinations on Barium Hexaferrite Synthesized via Sol-Gel Combustion

2011 ◽  
Vol 3 (3) ◽  
pp. 451-456 ◽  
Author(s):  
S. Kanagesan ◽  
S. Jesurani ◽  
M. Sivakumar ◽  
C. Thirupathi ◽  
T. Kalaivani
Keyword(s):  
Magnetic Measurements ◽  
Sol Gel ◽  
Barium Hexaferrite ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Nitrates ◽  
Microwave Furnace ◽  
Gel Combustion ◽  
Hexagonal Platelet

In the present work we have shown a novel Barium hexaferrite (BaFe12O19 - BaF) powder synthesized by a sol-gel combustion route using metal nitrates and D-Fructose. BaFe12O19 precursor was calcined using microwave furnace at 900°C for 10 minutes. The products were characterized by X-ray diffraction (XRD), high resolution scanning electron microscope (HR-SEM), and vibrating sample magnetometer (VSM), whose results indicate that they have well crystalline phase of barium hexaferrite, the diameter of the hexagonal platelet-like structure ranges from 50 to 100 nm. Magnetic measurements showed that the coercivity was 5558.6 Oe and saturation magnetization was 55.20 emu/g. Magnetic measurements for the barium hexaferrite showed enhanced coercivity.Keywords: Sol-gel combustion; Hexaferrite; D-Fructose; Remanent magnetization; Precursor.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi:10.3329/jsr.v3i3.6483               J. Sci. Res. 3 (3), 451-456 (2011)

scholarly journals Sintering behavior of Y2O3 doped Bi2O3 ceramics

2007 ◽  
Vol 39 (3) ◽  
pp. 215-221 ◽  
Author(s):  
M. Alizadeh ◽  
A. Maghsoudipour ◽  
F. Moztarzadeh ◽  
K. Ahmadi ◽  
M. Saremi
Keyword(s):  
Relative Density ◽  
Sintering Temperature ◽  
Stable Phase ◽  
Sintering Behavior ◽  
X Ray Diffraction ◽  
Time Duration ◽  
Soaking Time ◽  
Density Measurements ◽  
X Ray ◽  
Different Temperatures

Influence of sintering temperature and soaking time on densification of Bi2O3 samples doped with 25%mol Y2O3 was investigated by shrinkage and relative density measurements. Samples were sintered in air at different temperatures in the range of 800 to 1000?C for 24 hr. The results showed that samples sintered at 950?C have the maximum relative density. Several samples were sintered at 950?C for duration of 0 to 36 hr in order to evaluate the effect of soaking time on densification of samples. It was found that the samples were sintered at 950?C for 36hr had higher relative density than others did for smaller time duration X-ray diffraction (XRD) analyses detected ? -Bi2O3 as the sole stable phase in all samples. Scanning Electron Microscopy (SEM) investigation of fractured surface of the samples showed that porosities decrease by increasing of sintering temperature and grow by further increasing of temperature.

Influence of Sol-Gel pH and Soaking Time on the Morphology, Phases and Grain Size of TiO2 Coating

2017 ◽  
Vol 268 ◽  
pp. 219-223
Author(s):  
Nur Dalilah Johari ◽  
Zulkifli Mohd Rosli ◽  
Jariah Mohamad Juoi ◽  
Muharniza Azinita Musa
Keyword(s):  
Grain Size ◽  
Surface Morphology ◽  
Ph Value ◽  
Sol Gel ◽  
Glass Slide ◽  
X Ray Diffraction ◽  
Soaking Time ◽  
X Ray ◽  
Brookite Phase ◽  
Gel Ph

Titanium oxide, (TiO2), can exist in three distinct crystallographic phases known as anatase, rutile, and brookite. Brookite, however, is the least known TiO2 phases and usually exists as byproduct during synthesising rutile or anatase. Therefore, in this study, the influence of sol-gel pH and soaking time on surface morphology, phases and grain size of TiO2 coating were investigated in an attempt to develop brookite thin film. Titanium (IV) isopropoxide (TTiP) is used as precursor for preparing TiO2 sols. Prior to heating, TiO2 layers were deposited on a glass slide by dipping it five times into TiO2 sols. The TiO2 layers were then heated at 450°C and soaked for 1 and 3 hours to form TiO2 coating. Analysis on the phases and grain size were carried out using X-ray diffraction (XRD). The TiO2 surface morphology was investigated using Scanning Electron Microscope (SEM). Results showed that brookite phase with grain size of 27.40 nm successfully deposited on glass slide from sols with pH12. Conversely, the TiO2 coatings deposited from sols of pH1 and pH7 are amorphous. The effect of soaking time on phases and grain size is insignificant but enhances coatings uniformity as the soaking time increased. Thus, it can be concluded that sol-gel pH affect TiO2 crystallinity and phases. Brookite film is develop only when the TiO2 sols is in bases condition or at higher pH value.

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