cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
BERKALA FISIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
BERKALA FISIKA adalah jurnal saintifik yang diterbitkan secara periodik 3 bulanan. Jurnal ini memuat kajian-kajian Fisika baik kajian teoretik maupun hasil eksperimen. Jurnal ini juga memberi ruang yang luas bagi kajian – kajian aplikasi fisika dalam bidang teknologi, ilmu-ilmu hayati dan kedokteran.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 15, No 2 (2012): Berkala Fisika" : 5 Documents clear
SINTESIS DAN KARAKTERISASI MATERIAL MAGNETIK BARIUM HEXAFERRITE TERSUBSTITUSI MENGGUNAKAN TEORI SOLGEL UNTUK APLIKASI SERAPAN GELOMBANG MIKRO PADA FREKUENSI X-BAND Sulistyo, Sulistyo; Marhaendrajaya, Indras; Priyono, Priyono
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.297 KB)

Abstract

The Barium hexaferrite well known by permanen magnet which have prime properties for microwave application. The properties of Barium hexaferrite modified by substitution of MnCo and Ti have been investigated. Material was produced by sol-gel processing. Analysis of composition, crystal structure, refinement, microstructure and grain size, hysterisies and microwave characteristic respectively done by means of EDX, XRD, GSAS, SEM, magnetometers and wave guide at frequency1-17GHz. The formed crystal structure were hexagonal with the grain size is 500 nm, saturation magnetisation, field of coercivities , and remaneninduction respectively is 0.32 T,  3.8 kA/m and 0.04 T. The substitution of Fe3+ ion, resulted on decreasing the value of Ms, Hc , Rr and range of microwave absorbtion respectively. The maximum absorbtion of microwave occured on frequency 13.6 GHz.Keywords : barium hexaferrite, permanen magnet, sol-gel method, microwave
Sintesis Nanopartikel Cerium Oxide Menggunakan Metode Presipitasi dan Sifat Optiknya Nurhasanah, Iis; Sutanto, Heri; Muhlisin, Zaenul; Nurdianik, Sulistia; Nursanti, Ida
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.071 KB)

Abstract

Cerium oxide nanoparticles have been synthesized using precipitation method in mixed-solvent system of aquades DM and isopropanol with volume rasio of 1:6.  Presipitation wascarried out by dropping amonium hidroxide to cerium nitrate hexahydrate solution until pH of 9. Precipitated was dried at temperature of 60oC for 2 hours and then calcined  for 2 hours attemperatur of 200oC, 300o and 400oC. Optical properties of cerium oxide nanoparticles werecharacterized using UV-Vis spectrophotometer. Cerium oxide nanoparticles exhibit goodtransparency in visible region and strong UV absorbance. These reults suggesting that ceriumoxide nanoparticles are potential as bionanomaterial for application in UV-blocker.Keywords: cerium oxide, nanoparticles, precipitation, UV filter, band gap energy, UV-Visspectrophotometer
APLIKASI IMC BERBASIS STRATEGI PENALAAN PENGENDALI PID DIGITAL PADA SISTEM PEMANAS UDARA Khuriati RS, Ainie
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.995 KB)

Abstract

This paper investigated  an application of the methodology that was developed by Rivera, a methodology to obtain reduced-order models that satisfy the Prett-Garcıa digital PID tuningrules, using prefiltered ARX estimation as a  basis. The  method was applicated as the temperaturecontrol system on theair heater. IMC-PID controller is not only superior but it has a simple andgeneral structure such as that of a PID controller too.Keywords:  PID digital , IMC, ARX model.
SIMULASI MONTE CARLO UNTUK MENENTUKAN DOSIS SINAR-X 6 MV PADA KETAKHOMOGENAN MEDIUM JARINGAN TUBUH Rizani, Alfian; Setiabudi, Wahyu; Anam, Choirul
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.831 KB)

Abstract

Study on dose distribution of human body at 6 MV X-ray beam has been done using Monte Carlo Simulation. This study is aimed to define dose distribution of soft tissues, lungs andbones also corrections factor due to tissue inhomogeneity.The study was conducted by Monte Carlo Simulation using EGSnrc software, i.e.BEAMnrc and DOSXYZnrc. The linear accelerator head was simulated by BEAMnrc  with SSD100 cm and field size 10 x 10 cm . The calculating of radiation dose distribution at homogen andnonhomogen phantom that have size 40 x 40 x 40 cm in tissues of human body, such as softtissues, lungs and bones were made by using DOSXYZnrc. Nonhomogen phantom of human bodywas made by insert lungs or bones with thickness 10 cm in soft tissues at depth of 5 cm – 14 cm.It is obtained that the dose distribution of soft tissue and water phantom have samecharacteristic which both of them have maximum dose (D ) at depth of 1,5 cm. Inserting of lungswith a thickness of 10 cm in soft tissue results to the increasing of dose until 12,2 % and insertingof bones with the same thickness with lungs results to decreasing of dose until 10,3 %. The rangeof correction factor due to inserting lungs is 1,00–1,27 and for bone is 0,81–1,05.Keywords:Monte Carlo Simulation, PDD (Percentage Depth Dose), corrections factor
PERUBAHAN BUTIR DAN PENENTUAN TEMPERATUR PEMBENTUKAN BARIUM HEXAFERRITE TERSUBSTITUSI ION Mn+2 Dan Ti+4 MELALUI MEKANISME MEKANIKA MILLING Priyono, Priyono; Manaf, A
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (907.403 KB)

Abstract

Abstract Ferrite as magnetic material has been exploited for various the application for exampleas electronic peripherals and optic like hard magnetic also soft magnetic materials. For theapplication of high frequency usually exploited as circulator, phase shifter and absorber and antidetection material. In research has been done synthesis and characterization of sewer structuresnanocristall barium phase hexaferrite substitution is partial with ion Manganese and Titaniumthrough mechanics engineering alloy. Indicated that monophase formation of Barium Hexaferriteis substitution by Mn+2 and Ti+4 happened at growth temperature above 7500 C. At low relativetemperature 5000 C and 750 0 C , 8500 C and 10000 C  result of plant from mechanics processalloy is not happened formation of phase, but only experiences recrystallization to returnfollowed with magnification growth of grain its. Above heating 7500 C plant grain desisted andhappened orthogonal transformation of off the cuff phase towards formation of bariumhexaferrite substitution by Mn+2 and Ti+4 ions. In research is not found existence of intermediatephase during formation of the phaseKeywords: recrystalization, high frequency, intermediate phase, ferrites

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2012 2012


Reset
Filter By Issues
All Issue Vol 26, No 1 (2023): Berkala Fisika Vol 25, No 4 (2022): Berkala Fisika Vol 25, No 2 (2022): Berkala Fisika Vol 24, No 4 (2021): Berkala Fisika Vol 24, No 3 (2021): Berkala Fisika Vol 24, No 1 (2021): Berkala Fisika Vol 23, No 4 (2020): Berkala Fisika Vol 23, No 3 (2020): Berkala Fisika Vol 23, No 2 (2020): Berkala Fisika Vol 23, No 1 (2020): Berkala Fisika Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 Vol 16, No 4 (2013): Berkala Fisika Vol 16, No 3 (2013): Berkala Fisika Vol 16, No 2 (2013): Berkala Fisika Vol 16, No 1 (2013): Berkala Fisika Vol 15, No 4 (2012): Berkala Fisika Vol 15, No 3 (2012): Berkala Fisika Vol 15, No 2 (2012): Berkala Fisika Vol 15, No 1 (2012): Berkala Fisika Vol 11, No 2 (2008): Berkala Fisika Vol 14, No 4 (2011): Berkala Fisika Vol 14, No 3 (2011): Berkala Fisika Vol 14, No 2 (2011): Berkala Fisika Vol 14, No 1 (2011): Berkala Fisika Vol 13, No 4 (2010): Berkala Fisika Vol 13, No 3 (2010): Berkala Fisika Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus Vol 13, No 2 (2010): Berkala Fisika Vol 13, No 1 (2010): Berkala Fisika Vol 12, No 4 (2009): Berkala Fisika Vol 12, No 3 (2009): Berkala Fisika Vol 12, No 2 (2009): Berkala Fisika Vol 12, No 1 (2009): Berkala Fisika Vol 11, No 4 (2008): Berkala Fisika Vol 11, No 3 (2008): Berkala Fisika Vol 11, No 1 (2008): Berkala Fisika Vol 10, No 4 (2007): Berkala Fisika Vol 10, No 3 (2007): Berkala Fisika Vol 10, No 2 (2007): Berkala Fisika Vol 10, No 1 (2007): Berkala Fisika Vol 9, No 4 (2006): Berkala Fisika Vol 9, No 3 (2006): Berkala Fisika Vol 9, No 2 (2006): Berkala Fisika Vol 9, No 1 (2006): Berkala Fisika More Issue