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All Journal MESIN Makara Journal of Technology
Safei Purnama
Pusat Teknologi Bahan Industri Nuklir, Badan Tenaga Nuklir Nasional Kawasan Puspitek, Serpong, Tangerang Selatan
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH SUHU TERHADAP KONDUKTIVITAS BAHAN KOMPOSIT (AgI)0,3(p-Al203)0,7 DAN (AgI)0,5(B-Al203)0,5 Purwanto, P.; Purnama, Safei
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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The composite materials of (Agl)„rffi-AliOj),,? and (Agl)„5(p-Al20})ll5 have been madebysolid state reaction mixing between Agl with /3-AI20j. The results show that the conductivity valuesof (AgOoJp-AliOj),,- were 5.98xW5 to 9.47xIO3 S/m, and the conductivity values of (Agl),l5(p-Al?Os),)j were 0.33x/04 to 4.47x/03 S/m asfunction of temperature. The conductivity of materialscompositedecreased at transition temperature, but the conductivity ofAgl increased with temperature.The activation energy of (Agl)o.}(/3-A/20})„- and (Agl)„5(P-Al203),,5 relative stable with value ofactivation energy between 0.74xl02" J to 2.80x102" J. The diffraction peaks of (Agl),, /fi-Al:Oj)„. -and(AgQojffi-dljOjJoj have thepeak ofAgl.
Thermal and -γ –Ray Irradiation Effects on the Ionic Conductivity of (LiCl)x(Montmorillonite)1-x Purnama, Safei; Jahja, Aziz Khan; Sakuma, Takeshi
Makara Journal of Technology Vol. 20, No. 3
Publisher : UI Scholars Hub

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Compositesof montmorillonite (MMT) - lithium salts have been prepared using a simple process of powders mixing followed by heating. The powders resulting from this method are expected to beionic conductors with a high ionic conductivity characteristics. This characteristics is also further improved by employing gamma-ray irradiation technique at specified irradiation doses. The best results were obtained for the (LiCl)0.5(MMT)0.5 composite with a room temperature ionic conductivity of 2.192 mS/cm, which then increases to ~5 mS/cm after gamma irradiation at a dose of 400 kGy. This value is equivalent to the value of the ionic conductivity of current commercial rechargeable lithium battery, which is ~10 mS/cm. However the commercial battery system is still employing an unsafe organic electrolyte. By employing this lightweight,inexpensive and high-temperature resistant ceramic montmorillonite, the final result of this Research and Development workt is expected to provide an alternative solid electrolyte system for rechargeable battery which is safer and more inexpensive especially for secondary battery technology development in Indonesia.
Co-Authors Jahja, Aziz Khan P Purwanto Sakuma, Takeshi