Article Per Year (5 Year)
p-Index From 2019 - 2024
0
P-Index
This Author published in this journals
All Journal BERKALA FISIKA INDONESIAN JOURNAL OF APPLIED PHYSICS
Wahyu Widanarto, Wahyu
Jurusan Fisika, FakultasMatematika dan Ilmu Pengetahuan Alam, UNSOED, Purwokerto
Astronomy Energy Materials Science & Nanotechnology Physics

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Pengaruh temperatur sintering terhadap struktur dan sifat magnetik La3+ - barium nanoferit sebagai penyerap gelombang mikro Hasanah, Siti Uswatun; Widanarto, Wahyu; Sunardi, Sunardi
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): IJAP Volume 07 ISSUE 02 YEAR 2017
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.14978

Abstract

Seri La3+-barium nanoferit telah dibuat melalui metode solid-state reaction termodifikasi tanpa sintering dan dengan sintering pada temperatur 600, 800 dan 1000 °C. Pengaruh temperatur sintering terhadap komposisi, struktur, ukuran kristal, sifat magnetik dan kemampuan menyerap gelombang mikro dari La3+-barium nanoferit dikarakterisasi masing-masing menggunakan XRD, VSM dan VNA. Hasil karakterisasi menunjukkan bahwa La3+-barium nanoferit yang di-sintering pada 600 ºC mempunyai kemampuan menyerap gelombang mikro yang paling baik, dengan rata-rata nilai reflection loss sebesar -16,2165 dB pada frekuensi 10,86 GHz. Ferit terdiri dari tiga fasa kristal yaitu BaLa2Fe2O7, BaFe11.9O19, dan Fe21.33O32 dengan nilai Hc yang rendah 231,65 Tesla. Hal ini menunjukkan bahwa temperatur sintering sangat berpengaruh terhadap La3+-barium ferit sebagai penyerap gelombang mikro.
PENGARUH ADITIF BaCO3 PADA KRISTALINITAS DAN SUSEPTIBILITAS BARIUM FERIT DENGAN METODA METALURGI SERBUK ISOTROPIK Nugraha, Priska R.; Widanarto, Wahyu; Cahyanto, Wahyu Tri; Kuncoro, Handoko S.
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.367 KB)

Abstract

Influences of concentration of BaCO3 on crystallinities and susceptibilities of barium ferrites using isotropic powder metallurgy method of fabrication is studied based on the characterization of X-Ray Diffraction (XRD), crystallite size distributions and hysteresis curve of Vibrating Sample Magnetometer (VSM).  In this study, Fe2O3 of Cilacap iron sands are doped with BaCO3 with various concentrations of 15%, 30% and 45% at 1100 °C of sintering temperature.  The results show that the addition of BaCO3 affects the formation of the multi-phase barium ferrite crystals and widen the crystallite size distribution, as well as lowering the saturations and the magnetic remanences. The optimum composition for barium ferrite magnets is obtained for 15% of BaCO3, with the highest mass susceptibility of 2.4 × 10-6 M3/Kg. Keywords: Barium hexaferrites, isotropic powder metallurgy, crystal characterizations, permanent magnets
PENINGKATAN SIFAT MAGNETIK MATERIAL HEMATIT MELALUI SUBTITUSI BARIUM DAN KONTROL TEMPERATUR SINTERING Widanarto, Wahyu; Fauzi, Fuzi Nurrahman; Cahyanto, Wahyu Tri; Effendi, Mukhtar
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.079 KB)

Abstract

Ferrite magnet or ceramic magnet is a competitive product in the magnet market due to low price, corrosion resistant and chemically stable. Barium hexa-ferrite magnet is one of ferrite magnet which is mostly used as magnetic storage and electronic devices based on nanotechnology. Barium hexa- ferrites are synthetized through solid state reaction method at sintering temperatures of 1100 °C with the composition (100-x)Fe2O3 : xBaCO3 , where x = 0 and 20 in mol % . Results of XRD characterization show that the diffraction peaks of XRD spectrum is dominated by the peaks of barium ferrite crystal with a hexagonal crystal system. Magnetic properties of Fe2O3 material doped with barium carbonate of 20 mol % and sintered at 1100 °C increase significantly compared to the others. This simple and inexpensive method is very promising for the manufacture of barium hexa-ferrite materials with natural ferrite as the main material.Keywords: Iron sand, barium ferrite, structure, magnetic properties
Co-Authors Aris Setiawan Fuzi Nurrahman Fauzi, Fuzi Nurrahman Handoko S. Kuncoro, Handoko S. Mukhtar Effendi Priska R. Nugraha, Priska R. Siti Uswatun Hasanah Sunardi Sunardi Wahyu Tri Cahyanto