Advanced structure research methods of amorphous Co69Fe4Cr4Si12B11 microwires with giant magnetoimpedance effect: Part 1 – Crystallization kinetics and crystal growth

Cr-substituted mesoporous aluminophosphate molecular sieve (Cr-MAP) was synthesized and characterized. Crystallization kinetics curves measured as an index to the relative degree of crystallinity, according to the Arrhenius equation to calculate the apparent nucleation activation energy and crystal growth activation energy of Cr-MAP, which was 63.7 and 14.7 kJ• mol-1, respectively. Cr-MAP had highly catalytic activity for fabricating acetophenone by selectively oxizing ethylbenzene. Using tert-butylhydroperoxide as oxidant and chlorobenzene as solvent at 100 °C for 8 h, acetophenone selectivity, acetophenone yield and ethylbenzene conversion reaches 85.4, 62.2 and 72.8 %, respectively.

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Effect of Arenga Pinnata “Ijuk” Fiber as Nucleating Agent on Crystallization Kinetics of Impact Polypropylene Copolymer

Materials Science Forum ◽

10.4028/www.scientific.net/msf.923.56 ◽

2018 ◽

Vol 923 ◽

pp. 56-60 ◽

Cited By ~ 1

Author(s):

Mochamad Chalid ◽

Evana Yuanita ◽

Ghiska Ramahdita ◽

Jaka Fajar Fatriansyah

Keyword(s):

Crystal Growth ◽

Crystallization Kinetics ◽

Nucleating Agent ◽

Avrami Equation ◽

Nucleating Agents ◽

Impact Polypropylene Copolymer ◽

Kinetics Of

Impact Polypropylene Copolymer (IPC) is one of the PP type which is widely used. IPC was made with addition of ethylene in PP which decreases PP crystallinity. Many efforts have been made to improve the properties of PP crystallinity by addition of nucleating agents. In this study, we use Arenga Pinnata “Ijuk” fiber as PP nucleating agent. In order to determine the effect of “Ijuk” fiber as nucleating agents in kinetics aspect, we used DSC measurement based on Avrami equation. The results showed that the addition of ijuk decreases crystallizationhalf timeand dimension of crystal growth which indicate the effects of “Ijuk” fiber as a nucleating agent.

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Giant magnetoimpedance effect in a positive magnetostrictive glass-coated amorphous microwire

Physical Review B ◽

10.1103/physrevb.65.064402 ◽

2002 ◽

Vol 65 (6) ◽

Cited By ~ 30

Author(s):

K. Mandal ◽

S. Pan Mandal ◽

M. Vázquez ◽

S. Puerta ◽

A. Hernando

Keyword(s):

Giant Magnetoimpedance ◽

Giant Magnetoimpedance Effect ◽

Amorphous Microwire

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Analysis of current-density distribution and giant magnetoimpedance effect in composite wires

Acta Physica Sinica ◽

10.7498/aps.55.2014 ◽

2006 ◽

Vol 55 (4) ◽

pp. 2014

Author(s):

Liu Long-Ping ◽

Zhao Zhen-Jie ◽

Huang Can-Xing ◽

Wu Zhi-Ming ◽

Yang Xie-Long

Keyword(s):

Density Distribution ◽

Current Density ◽

Current Density Distribution ◽

Giant Magnetoimpedance ◽

Giant Magnetoimpedance Effect ◽

Composite Wires

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Dissolution, Nucleation, Crystal Growth, Crystal Aggregation, and Particle Breakage of Amlodipine Salts: Modeling Crystallization Kinetics and Thermodynamic Equilibrium, Scale-up, and Optimization

Industrial & Engineering Chemistry Research ◽

10.1021/ie501572h ◽

2014 ◽

Vol 53 (26) ◽

pp. 10762-10774 ◽

Cited By ~ 23

Author(s):

Andrej Pohar ◽

Blaž Likozar

Keyword(s):

Crystal Growth ◽

Crystallization Kinetics ◽

Thermodynamic Equilibrium ◽

Scale Up ◽

Particle Breakage ◽

Crystal Aggregation ◽

Kinetics And Thermodynamic

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Modeling the Giant Magnetoimpedance Effect in Amorphous Microwires with Induced Magnetic Anisotropy

The Physics of Metals and Metallography ◽

10.1134/s0031918x20110071 ◽

2020 ◽

Vol 121 (11) ◽

pp. 1033-1038

Author(s):

V. V. Popov ◽

N. A. Buznikov

Keyword(s):

Magnetic Anisotropy ◽

Giant Magnetoimpedance ◽

Giant Magnetoimpedance Effect ◽

Induced Magnetic Anisotropy ◽

Amorphous Microwires

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Scattering of Microwaves by a Passive Array Antenna Based on Amorphous Ferromagnetic Microwires for Wireless Sensors with Biomedical Applications

Sensors ◽

10.3390/s19143060 ◽

2019 ◽

Vol 19 (14) ◽

pp. 3060

Author(s):

Alberto Moya ◽

Diego Archilla ◽

Elena Navarro ◽

Antonio Hernando ◽

Pilar Marín

Keyword(s):

Biomedical Applications ◽

High Sensitivity ◽

Bias Field ◽

Giant Magnetoimpedance ◽

Scattering Parameter ◽

Giant Magnetoimpedance Effect ◽

Radiation Theory ◽

Temperature Detector ◽

Frequency Sweeps ◽

Amorphous Microwires

Co-based amorphous microwires presenting the giant magnetoimpedance effect are proposed as sensing elements for high sensitivity biosensors. In this work we report an experimental method for contactless detection of stress, temperature, and liquid concentration with application in medical sensors using the giant magnetoimpedance effect on microwires in the GHz range. The method is based on the scattering of electromagnetic microwaves by FeCoSiB amorphous metallic microwires. A modulation of the scattering parameter is achieved by applying a magnetic bias field that tunes the magnetic permeability of the ferromagnetic microwires. We demonstrate that the OFF/ON switching of the bias activates or cancels the amorphous ferromagnetic microwires (AFMW) antenna behavior. We show the advantages of measuring the performing time dependent frequency sweeps. In this case, the AC-bias modulation of the scattering coefficient versus frequency may be clearly appreciated. Furthermore, this modulation is enhanced by using arrays of microwires with an increasing number of individual microwires according to the antenna radiation theory. Transmission spectra show significant changes in the range of 3 dB for a relatively weak magnetic field of 15 Oe. A demonstration of the possibilities of the method for biomedical applications is shown by means of wireless temperature detector from 0 to 100 °C.

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Giant Magnetoimpedance in as Quenched Fe Based Nanocrystalline Ribbons

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.2219 ◽

2005 ◽

Vol 475-479 ◽

pp. 2219-2222 ◽

Cited By ~ 5

Author(s):

Ji Fan Hu ◽

Hong Wei Qin ◽

Minhua Jiang ◽

Bo Li ◽

Dongliang Zhao ◽

...

Keyword(s):

Grain Size ◽

Magnetic Materials ◽

Melt Spinning ◽

Experimental Results ◽

Soft Magnetic Materials ◽

Soft Magnetic ◽

Giant Magnetoimpedance ◽

Giant Magnetoimpedance Effect ◽

Additional Annealing ◽

Melt Spinning Technique

FeCuNbSiB and FeZrBCu nanocrystalline ribbons can be obtained directly through the melt- spinning technique without additional annealing processes. The giant magnetoimpedance can be observed in FeCuNbSiB and FeZrBCu as quenched ribbons. The addition of Cu improves the nano-crystallization of a-Fe(Si) or a-Fe phase and reduces the grain size in FeCuNbSiB and FeZrBCu as quenched ribbons, which enhances the magnetoimpedance via increasing the variation of permeability under fields. The present experimental results reveal a novel route to fabricate the Fe based nanocrystalline soft magnetic materials with giant magnetoimpedance effect.

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