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Title: Particle size effect on microwave absorbing of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of ultrasonic irradiation

Abstract

Doped manganites have attracted substantial interest due to their unique chemical and physics properties, which makes it possible to be used for microwave absorbing materials. In this paper we report synthesizes and characterization of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of a high power ultrasonic treatment. After solid state reaction, the presence of single phase was confirmed by X-ray Diffraction (XRD). Refinement results showed that samples are single phase with monoclinic structure. It was found that powder materials derived from mechanical alloying results in large variation in the particle size. A significant improvement was obtained upon subjecting the mechanically milled powder materials to an ultrasonication treatment for a relatively short period of time. As determined by particle size analyzer (PSA), the mean particle size gradually decreased from the original size of 5.02 µm to 0.36 µm. Magnetic properties were characterized by VSM, and hysteresis loops results showed that samples are soft magnetic. It was found that when the mean particle size decreases, saturation was increases and coersitivity was decreases. Microwave absorption properties were investigated in the frequency range of 8-12 GHz using vector network analyzer. An optimal reflection loss of 24.44 dB is reached at 11.4 GHz.

Authors:
 [1]; ;  [2]
  1. Faculty of Science and Technology, State Islamic University, Jakarta (Indonesia)
  2. Departement of Physics, University of Indonesia, Depok (Indonesia)
Publication Date:
OSTI Identifier:
22590879
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1719; Journal Issue: 1; Conference: 4. international conference on theoretical and applied physics (ICTAP) 2014, Bali (Indonesia), 16-17 Oct 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; BARIUM COMPOUNDS; DOPED MATERIALS; GHZ RANGE; HYSTERESIS; IRRADIATION; LANTHANUM COMPOUNDS; MAGNETIC PROPERTIES; MANGANESE COMPOUNDS; MICROWAVE RADIATION; MONOCLINIC LATTICES; PARTICLE SIZE; PARTICLES; POWDERS; REFLECTION; SOLIDS; TITANATES; ULTRASONIC WAVES; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION

Citation Formats

Saptari, Sitti Ahmiatri, E-mail: siti-ahmiatri@yahoo.co.id, Manaf, Azwar, and Kurniawan, Budhy. Particle size effect on microwave absorbing of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of ultrasonic irradiation. United States: N. p., 2016. Web. doi:10.1063/1.4943726.
Saptari, Sitti Ahmiatri, E-mail: siti-ahmiatri@yahoo.co.id, Manaf, Azwar, & Kurniawan, Budhy. Particle size effect on microwave absorbing of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of ultrasonic irradiation. United States. doi:10.1063/1.4943726.
Saptari, Sitti Ahmiatri, E-mail: siti-ahmiatri@yahoo.co.id, Manaf, Azwar, and Kurniawan, Budhy. Fri . "Particle size effect on microwave absorbing of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of ultrasonic irradiation". United States. doi:10.1063/1.4943726.
@article{osti_22590879,
title = {Particle size effect on microwave absorbing of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of ultrasonic irradiation},
author = {Saptari, Sitti Ahmiatri, E-mail: siti-ahmiatri@yahoo.co.id and Manaf, Azwar and Kurniawan, Budhy},
abstractNote = {Doped manganites have attracted substantial interest due to their unique chemical and physics properties, which makes it possible to be used for microwave absorbing materials. In this paper we report synthesizes and characterization of La{sub 0.67}Ba{sub 0.33}Mn{sub 0.94}Ti{sub 0.06}O{sub 3} powders prepared by mechanical alloying with the assistance of a high power ultrasonic treatment. After solid state reaction, the presence of single phase was confirmed by X-ray Diffraction (XRD). Refinement results showed that samples are single phase with monoclinic structure. It was found that powder materials derived from mechanical alloying results in large variation in the particle size. A significant improvement was obtained upon subjecting the mechanically milled powder materials to an ultrasonication treatment for a relatively short period of time. As determined by particle size analyzer (PSA), the mean particle size gradually decreased from the original size of 5.02 µm to 0.36 µm. Magnetic properties were characterized by VSM, and hysteresis loops results showed that samples are soft magnetic. It was found that when the mean particle size decreases, saturation was increases and coersitivity was decreases. Microwave absorption properties were investigated in the frequency range of 8-12 GHz using vector network analyzer. An optimal reflection loss of 24.44 dB is reached at 11.4 GHz.},
doi = {10.1063/1.4943726},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1719,
place = {United States},
year = {Fri Mar 11 00:00:00 EST 2016},
month = {Fri Mar 11 00:00:00 EST 2016}
}