scholarly journals Synthesis, Characterization and Electrical Properties of ZnFe2O4 Nanoparticles

2021 ◽  
Vol 7 (2) ◽  
pp. 946-948
Author(s):  
Md Ashfaq Hussain ◽  
S Sindhu ◽  
B Raghunanda ◽  
S. Molakeri Ajai Kumar
Keyword(s):  
Ac Conductivity ◽  
Zinc Ferrite ◽  
Size Range ◽  
Combustion Method ◽  
Dc Conductivity ◽  
Temperature Dependent ◽  
Particle Size Range ◽  
Ft Ir ◽  
Znfe2o4 Nanoparticles ◽  
Increasing Temperature

Zinc ferrite (ZnFe2O4) nanoparticles were prepared by combustion method. The FT-IR, XRD and SEM with EDS were used to characterize the prepared sample. The characterization results confirm the successful synthesis of ZnFe2O4 nanoparticles with the particle size range of 24 – 30 nm. The temperature dependent DC conductivity of the sample has been studied in the temperature range 30-175 °C and AC conductivity was investigated between the frequencies of 10 Hz and 10 MHz. DC conductivity of the sample was increased while increasing temperature and AC conductivity was increased as the frequency increased.

scholarly journals Evaluation of Antioxidant and Cytotoxicity Activities of Copper Ferrite (CuFe2O4) and Zinc Ferrite (ZnFe2O4) Nanoparticles Synthesized by Sol-Gel Self-Combustion Method

2016 ◽  
Vol 6 (9) ◽  
pp. 184 ◽  
Author(s):  
Samikannu Kanagesan ◽  
Mansor Hashim ◽  
Sidek AB Aziz ◽  
Ismayadi Ismail ◽  
Subramani Tamilselvan ◽  
...  
Keyword(s):  
Zinc Ferrite ◽  
Sol Gel ◽  
Combustion Method ◽  
Copper Ferrite ◽  
Znfe2o4 Nanoparticles ◽  
Cytotoxicity Activities

Cononsolvency Phenomena of Poly(N-Isopropylacrylamide) in Mixed Solvents at Different Temperatures

2011 ◽  
Vol 332-334 ◽  
pp. 1752-1755
Author(s):  
Xiao Xia Qiu ◽  
Jie Sun ◽  
Shu Jie Tong ◽  
Shi Jia Wang ◽  
Li Yuan Wu ◽  
...  
Keyword(s):  
Mixed Solvents ◽  
Volume Ratio ◽  
Polymer Gels ◽  
High Water ◽  
Polymer Chains ◽  
Temperature Dependent ◽  
Different Temperatures ◽  
Ft Ir ◽  
Water Fractions ◽  
Increasing Temperature

N-isopropylacrylamide was synthesized in a mixture of DMF and THF ( 7:3 in volume ratio) and characterized by FT-IR. The behavior of poly(N-isopropylacrylamide) chain was studied by spectrometer in mixtures of water with DMF and THF. Cononsolvency phenomena were found to be temperature-dependent, as demixing occurred upon increasing temperature. A significant shrinkage of polymer chains and deswelling of polymer gels, followed by phase separation, were observed for high water fractions.

Temperature Dependent Dielectric Constant and AC Conductivity of Porous CeO2 Nanoparticles Obtained by Solution Combustion Method

2018 ◽  
Vol 7 (4) ◽  
pp. 620-625 ◽  
Author(s):  
B. M. Harish ◽  
S. Yallappa ◽  
B. S. Avinash ◽  
V. S. Chaturmukha ◽  
H. S. Jayanna ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Ac Conductivity ◽  
Combustion Method ◽  
Ceo2 Nanoparticles ◽  
Temperature Dependent ◽  
Solution Combustion ◽  
Solution Combustion Method

Theoretical and experimental studies on DC conductivity and temperature-dependent AC conductivity of poly(butyl methacrylate)/Nd-TiO2 nanocomposites

2019 ◽  
Vol 33 (8) ◽  
pp. 1061-1077 ◽  
Author(s):  
K Suhailath ◽  
MT Ramesan
Keyword(s):  
Ac Conductivity ◽  
Volume Fraction ◽  
Experimental Studies ◽  
Dc Conductivity ◽  
Butyl Methacrylate ◽  
Temperature Dependent ◽  
Exponential Factor ◽  
Structural Regularity ◽  
Uniform Dispersion ◽  
Xrd Patterns

Electrically conductive nanocomposite system based on poly(butyl methacrylate) (PBMA) with different contents of neodymium-doped titanium dioxide (Nd-TiO2) was prepared by in situ free radical polymerization method. The effect of Nd-TiO2 on the morphology and structural properties of the composites was carried out by scanning electron microscope (SEM) and X-ray diffraction analysis (XRD). The temperature-dependent AC conductivity and DC electrical conductivity of PBMA/Nd-TiO2 nanocomposites were studied with respect to the different volume fraction of Nd-TiO2 nanoparticles. SEM and XRD patterns revealed the uniform dispersion and structural regularity of nanoparticles in the polymer matrix. The AC conductivity of PBMA and its composites were found to be increased with an increase in temperatures and frequencies. The activation energy and exponential factor were analyzed from AC conductivity and both results indicate the hopping conduction mechanism present in PBMA/Nd-TiO2 nanocomposite, which is responsible for the variation of conductivity with temperature also. The DC conductivity of nanocomposites was higher than pure PBMA and the conductivity increases with increase in the concentration of Nd-TiO2 nanoparticles. Experimental and theoretical investigations based on McCullough, Bueche, Scarisbrick, and Mamunya modeling were carried out to observe the DC conductivity differences induced by the addition of Nd-TiO2 nanoparticles in PBMA matrix. Among the various modeling studied here, Mamunya model shows better agreement with the experimental conductivity.

381. Sampling Efficiencies of Three Personal Aerosol Samplers within and Beyond the Inhalable Particle Size Range

2001 ◽  
Author(s):  
V. Aizenberg ◽  
P. Baron ◽  
K. Choe ◽  
S. Grinshpun ◽  
K. Willeke
Keyword(s):  
Particle Size ◽  
Size Range ◽  
Particle Size Range

Synthesis and Characterization of a Novel Linear Benzoxazine-Containing Polytriazole via Metal-Free Click Reaction and its Self-Crosslinking Behavior

2012 ◽  
Vol 557-559 ◽  
pp. 973-978
Author(s):  
Zhong Yi Xu ◽  
Lei Du ◽  
Li Qiang Wan ◽  
Fa Rong Huang
Keyword(s):  
Click Reaction ◽  
Decomposition Temperature ◽  
Linear Polymer ◽  
The Novel ◽  
Metal Free ◽  
Crosslinked Polymer ◽  
Degradation Behaviors ◽  
Ft Ir ◽  
Increasing Temperature

A novel linear benzoxazine-containing polytriazole was successfully synthesized via metal-free click reaction. Benefited from the advantages of click reaction, the synthesis procedure was easily and efficiently. The linear polymer could be transformed into crosslinked structure after ring-opening polymerization of oxazine induced by the increasing temperature. The FT-IR characterization verified the structure transformation between linear and crosslinked polymer. Moreover, the thermal properties and thermal degradation behaviors of linear polymer and the corresponding crosslinked polymer were studied by DSC and TGA. The novel polytriazole was proved to be a kind of thermal stable polymers with high thermal decomposition temperature (Td5over 300°C).

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