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INDONESIA
Jurnal Sains Materi Indonesia
Published by Badan Tenaga Nuklir Nasional
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Materials Science & Nanotechnology
Jurnal Sains Materi Indonesia (Indonesian Journal of Materials Science), diterbitkan oleh Pusat Teknologi Bahan Industri Nuklir - BATAN. Terbit pertama kali: Oktober 1999, frekuensi terbit: empat bulanan.
Arjuna Subject : -
Articles 2 Documents
 1 
Search results for , issue "Vol 11, No 2: FEBRUARI 2010" : 2 Documents clear
MATERIAL MAGNETIK BARIUM HEKSAFERIT TIPE-M UNTUK MATERIAL ANTI RADAR PADA FREKUENSI S-BAND Priyono Priyono; Azwar Manaf
Jurnal Sains Materi Indonesia Vol 11, No 2: FEBRUARI 2010
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (490.074 KB) | DOI: 10.17146/jusami.2010.11.2.4576

Abstract

MATERIAL MAGNETIK BARIUM HEKSA FERITTIPE-M UNTUK MATERIAL ANTI RADAR PADA FREKUENSI S-BAND.Dalam makalah ini dibahas preparasi dan evaluasi karakteristik senyawa material penyerap (absorber) gelombang mikro dengan komposisi BaFe12-2x MnxTixO19 (x = 0,0 hingga 1,5) yang diperoleh melalui proses subsitusi senyawa dasar barium heksaferit (BaO.6Fe2O3) melalui alur pemaduan mekanik (mechanical alloying). Pembentukan fasa material penyerap diawali dengan substitusi ion Mn dan ion Ti terhadap ion Fe dalam komponen material Fe2O3 pada suhu 1.300 oC. Material hasil substitusi dipadukan secara mekanik dengan komponen BaCO3 untuk membentuk fasa heksaferit tipe-M setelah reaksi padat. Identifikasi puncak difraksi sinar-X dari material hasil pemaduan mekanik ini menunjukkan secara meyakinkan bahwa telah terbentuk material fasa tunggal BaFe12-2x MnxTixO19. Evaluasi material mencakup ukuran rata-rata butir dan karakteristik serapan gelombang mikro pada rentang frekuensi 1 GHz hingga 6 GHz. Hasil evaluasi menunjukkan bahwa terjadi serapan gelombang pada frekuensi ~ 2.000MHz dan ~ 3.500MHz dengan koefisien refleksi yang relatif tinggi pada rentang frekuensi yang tersedia. Keberadaan ion Mn dan ion Ti mampu memperlebar frekuensi serapan terutama pada daerah 3.500 MHz.
FABRICATION OF UNGLAZED CERAMIC TILE USING DENSE STRUCTURED SAGO WASTE AND CLAY COMPOSITE Aripin Aripin; S. Tani; S. Mitsudo; T. Saito; T. Idehara
Jurnal Sains Materi Indonesia Vol 11, No 2: FEBRUARI 2010
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (137.266 KB) | DOI: 10.17146/jusami.2010.11.2.4580

Abstract

FABRICATION OF UNGLAZED CERAMIC TILE USING DENSE STRUCTURED SAGOWASTE AND CLAY COMPOSITE. In Indonesia, the sago processing industry generates every year huge amount of sago waste, and converting this waste into a useful material is possible. In the present study, physical properties of dense structured sago waste and clay composite were investigated in order to study the feasibility of reuse this sample as raw material in the producing of ceramics. Firstly, the chemical composition of ash (obtained from the sago waste) and clay was characterized. The prepared sample was sintered at the temperature range from 800 to 1,200 oC using electric furnace. The density, linear shrinkage and water absorption of the sintered sample were determined by using the Archimedes' method. The experimental result indicated that the density of the sintered sample increased with increasing sintering temperature up to 1100oC and then slightly decreased afterward. The water absorption of the products decreased with an increase in sintering temperature. In the sintered sample at 1,100 oC, the water absorption decreased rapidly and water adsorption of less than 1% was achieved. This water absorption was less than 5% which was needed for unglazed floor tile. The result of water adsorption suggest that it is possible to use this sample as a raw material for producing the ceramic floor tile.

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