Pengaruh Aditif Mgo dan Perlakuan Panas terhadap Material Elektro Keramik Berbasis Beta Alumina (β”-Alumina)

PENGARUH ADITIF MgO DAN PERLAKUAN PANAS TERHADAP MATERIAL ELEKTRO KERAMIK BERBASIS BETA ALUMINA (β”-ALUMINA). Telah dilakukan pembuatan β”-Alumina menggunakan metode metalurgi serbuk dengan paduan komposisi α-Alumina 83 %, Na2O 10 % dan variasi MgO masing-masing 5,5 %; 6,7%; 7,9 %; 8,9%dan 10%. Proses pencampuran dilakukan dengan menggerus selama 4 jam. Kemudian bahan paduan di bentuk pelet menggunakan hydroulic press dengan tekanan 3 ton. Sampel disinter pada suhu 1500 oC selama 5 jam. Untuk 7,9 % bahan diberikan perlakuan panas untuk 3 kali perlakuan panas pada suhu yang berbeda yaitu pada 1300 oC, 1400 oC dan 1500 oC. Karakterisasi meliputi analisis fasa dengan XRD, identifikasi fasa menggunakan perangkat lunak Match dan GSAS serta analisis struktur mikro dengan SEM. Hasil dari analisis fasa memperlihatkan telah terbentuknya β”-Alumina dan masih adanya β-Alumina pada semua variasi MgO yang digunakan. Dengan kata lain fasa β”-Alumina tidak terbentuk 100%. Variasi MgO juga memberikan densitas yang relatif tinggi begitu juga dengan fraksi berat. Pembentukan fasa β”-Alumina tidak mencapai 100 %, tetapi dengan penambahan MgO maka dapat diperoleh fasa stabil

Phase Analysis of Particles Nano Licoo2 as Cathode Materials of Rechargeable Battery Using X-ray Diffractometer

Research of the analysis of particle nano LiCoO2 phase as cathode material of lithium ion based batteries rechargeable using XRD has been done. Particle Nano LiCoO2 are synthesized using planetary milling technique followed by sonication. The morphology of particle nano LiCoO2 are characterized by using Scanning Electron Microscope (SEM) dan Transmission Electron Microscope (TEM), the phase of particle nano LiCoO2 have been analyzed using XRD. The results show that the size of the particle nano LiCoO2 isare 20-40 nm, the phase of n-particles LiCoO2 is rhombohedral, R-3m, with a = b = 2.82 Å and c = 14.08 Å, where LiCo formed octahedral symmetry, 3-3m, and CO2 to formed tetrahedral symmetry, 63m

Sifat Dinamik Mekanikal Vulkanisat Karet Alam-organoclay

Sifat dinamik dan swelling vulkanisat karet alam (NR) yang mengandung bahan pengisi organoclay dengan basal spasi yang berbeda telah dipelajari. Vulkanisat NR/organoclay dibuat dengan menggunakan metode pelelehan kompon di dalam gilingan terbuka. Sifat dinamik diukur dengan menggunakan Dynamic Mechanical Thermal Analyzer (DMTA). Hasil penelitian menunjukkan bahwa penambahan organoclay dengan basal spasi lebih besar (15A) menghasilkan struktur interkalasi/eksfoliasi di dalam matrik karet alam sehingga sifat dinamik mekanikal dan swelling menjadi lebih baik. Storage modulus di bawah Tg dan di atas Tg meningkat dengan peningkatan basal spasi organoclay. Adanya organoclay juga menyebabkan penurunan tan d dan Tg vulkanisat, terutama organoclay 15A. Organoclay 15A di dalam vulkanisat karet alam dapat menurunkan nilai swelling dan koefisien difusi, sorptivitas serta permeabilitas. Derajat ikatan silang dari NR/organoclay 15A sedikit lebih besar dan memperbaiki sifat elastis vulkanisat. Diterima : 7 Januari 2013; Disetujui : 24 April 2013How to Cite : Faturrohman, M., Soegijono, B., Budianto, E., & Yoneda, K. (2013). Sifat Dinamik Mekanikal Vulkanisat Karet Alam-Organoclay. Jurnal Penelitian Karet, 31(1), 45-53. Retrieved from http://ejournal.puslitkaret.co.id/index.php/jpk/article/view/13

Effect of Ph on the Synthesis of Cu-zno Catalysts by Sol Gel Process for Glycerolhidrogenolisis

Cu-ZnO catalyst in this study made for the reaction of glycerol to propylene glycol hidrogenolysis with sol gel process fromacetate salts. pH is an important parameter in sol gel process in the synthesis of Cu-ZnO nanocatalyst. pH ajustment of the sol influencing the morphology and structure of Cu-ZnO catalyst, seen from the characterization performed by X-Ray Diffractometer (XRD) and Scanning ElectronMicroscope (SEM). Diffraction spectra showed that the particle size of Cu-ZnO material is strongly influenced by the preparation. Cu-ZnO materials prepared at pH 7 and 8 showed a stong peak, mean the peak is broadening on Cu-ZnO prepared at pH 9. SEM-EDS of Cu and Zn ratios is different, which at pH 7 and 8, the ratio of Cu greater than Zn, while at pH 9, the ratio of Zn is higher than Cu which shows the interaction that changes the structure of the material in the presence of pH treatment. Confirmed by GC-MS analysis, at pH 7 and 8 the structure of Cu is in the core material and surrounded by Zn, and vice versa at pH 9 the structure of Zn in the nucleus and surrounded by Cu

Effect of Ph on the Synthesis of Cu-zno Catalysts by Sol Gel Process for Glycerolhidrogenolisis

Cu-ZnO catalyst in this study made for the reaction of glycerol to propylene glycol hidrogenolysis with sol gel process fromacetate salts. pH is an important parameter in sol gel process in the synthesis of Cu-ZnO nanocatalyst. pH ajustment of the sol influencing the morphology and structure of Cu-ZnO catalyst, seen from the characterization performed by X-Ray Diffractometer (XRD) and Scanning ElectronMicroscope (SEM). Diffraction spectra showed that the particle size of Cu-ZnO material is strongly influenced by the preparation. Cu-ZnO materials prepared at pH 7 and 8 showed a stong peak, mean the peak is broadening on Cu-ZnO prepared at pH 9. SEM-EDS of Cu and Zn ratios is different, which at pH 7 and 8, the ratio of Cu greater than Zn, while at pH 9, the ratio of Zn is higher than Cu which shows the interaction that changes the structure of the material in the presence of pH treatment. Confirmed by GC-MS analysis, at pH 7 and 8 the structure of Cu is in the core material and surrounded by Zn, and vice versa at pH 9 the structure of Zn in the nucleus and surrounded by Cu

Perhitungan Kurva Histeresis Intrinsik Material Zinc Oxide (Zno)

Energi bebas Gibbs dan kurva polarisasi spontan dari Zinc Oxide (ZnO) dihitung menggunakan Teori Landau-Devonshire. Program komputasi untuk menghitung Energi bebas Gibbs dan kurva polarisasi spontan  dibuat pada Delphi 6 . Dari hasil perhitungan menunjukan bahwa energi bebas Gibbs terendah terdapat pada ZnO doping Li 1%s yang menunjukan struktur kristal paling stabil

The influence of Cu doped on structure and mechanical properties of aluminium material

Development of technology in industrial field specially automotive needs specific materials with good properties. Aluminum materials are as alternative to answer this challenge. Aluminum alloy that is being developed by Cu doped will be found the new material with good properties. In this report, we have synthesized AlCu alloy using hot mixing method. The composition of 95.1 to 96.2 wt % of Al and 3.8 to 4.9 wt% of Cu were synthesized by melting and mixing process at a temperature of 1100 °C. Analysis of the structure of x-ray diffraction data for Al-Cu showed a single phase of Al for all compositions. The mechanical properties such as hardness of highest vickers of alloy of 96.2% Al - 3.8% Cu is 80 kg/mm2 for cooling in room temperature

The influence of Cu doped on structure and mechanical properties of aluminium material

Development of technology in industrial field specially automotive needs specific materials with good properties. Aluminum materials are as alternative to answer this challenge. Aluminum alloy that is being developed by Cu doped will be found the new material with good properties. In this report, we have synthesized AlCu alloy using hot mixing method. The composition of 95.1 to 96.2 wt % of Al and 3.8 to 4.9 wt% of Cu were synthesized by melting and mixing process at a temperature of 1100 °C. Analysis of the structure of x-ray diffraction data for Al-Cu showed a single phase of Al for all compositions. The mechanical properties such as hardness of highest vickers of alloy of 96.2% Al - 3.8% Cu is 80 kg/mm2 for cooling in room temperature