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Jurnal Sains Materi Indonesia

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Published by Badan Tenaga Nuklir Nasional

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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.

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Articles 9 Documents

Search results for , issue "Vol 20, No 2: JANUARY 2019" : 9 Documents clear

THE POTENTIAL OF INDONESIAN GRAPHITE AS RDE FUEL MATRIX Deni Mustika; Sudirman Sudirman; Adel Fisli; I Made Joni; Th. Rina M.
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2019.20.2.5472

THE POTENTIAL OF INDONESIAN GRAPHITE AS RDE FUEL MATRIX. The development plan of Ex- perimental Power Reactor (RDE) in Indonesia is non-commercial and leads to the technology type of Pebble Bed Reactor (PBR) - High Temperature Gas Cooled Reactor (HTGR). The fuel used for PBR reactors is kernel dispersed in spherical fuel elements. The matrix used in PBR nuclear fuel is graphite which functions as a neutron moderator, fuel protective material and heat conductor. Domestication of the domestic fuel matrix needs to be conducted to improve national independence. Therefore, it is necessary to do research on the potential of local graphite to be used as RDE fuel matrix. This study focused on the identification and characterization of local and commercial graphite. The results are compared with the literature, how far it is fulfilling nuclear grade graphite for PBR fuel matrix. Characterization of graphite includes phase analysis with XRD, micro- structure with SEM, surface area/porosity, impurities determination with AAS, ICP-OES and NAA, equivalent boron content, carbon content, density, particle size distribution and ash content. The characterization results show that the carbon content obtained was 87.0 ± 4.2% for local graphite and 100% for commercial graphite. Meanwhile, for the purposes of nuclear graphite it requires a carbon content of >99%. The impurity content in local and commercial graphite still does not meet the RDE fuel matrix standard. The results of XRD analysis show that the local graphite phase is the same as the commercial graphite phase, namely the 2H graphite hexagonal crystal system with the lattice group of P 63/mmc. Particle size distribution and surface area of local graphite are higher compared to nuclear graphite literature. The ash content of commercial graphite was 0.236 ± 0.029 and local graphite was 9.587 ± 0.010%. The results of this study indicate that the local graphite from the flotation still requires a further refinement process to obtain local graphite that can be used as a fuel matrix for RDE.

Preface JUSAMI Vol. 20, No. 2, January 2019 Preface JUSAMI
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (156.281 KB)

THERMAL DECOMPOSITION KINETICS OF LANTHANUM OXALATE HYDRATE PRODUCT TREATMENT FROM MONAZITE M V Purwani; Suyanti Suyanti; Wisnu Ari Adi
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2019.20.2.5295

THERMAL DECOMPOSITION KINETICS OF LANTHANUM OXALATE HYDRATE PRODUCT TREATMENT FROM MONAZITE. Unreacted shrinking core model variation was developed for calcination and solid thermal decomposition reaction to non catalytic gas and no gas reactants were involved. In this research, thermal decomposition of lanthanum oxalate hydrate product treatment of monazite. The parameters for modeling are the time and temperature of thermal decomposition. The time was between 0 - 150 minutes with 30 minute intervals and the temperature range between 600 – 700 oC with 100 oC intervals. Based on the experimental data it can be concluded that the most suitable model was unreacted core sphere ash diffusion controls and obtained the relation between temperature T oC with diffusion coefficient D following equation D = 0.0011 T + 0.5175 with linearity R² = 0.9561. Another possible model was the sphere reaction control and obtained the relationship between 1 / T (K) and reaction rate constant ks was ks = 48873.e -4.88 / RT with activation energy = 4.88 kJ. The relationship between time t with rc (radius of particles at time t) at various temperatures and the relation between temperature and rc at various times follows the exponential line equation. If temperature and time parameters were combined will find the relation between time and temperature with rc following the equation ln rc = -0.9536 (9E-04 T + 0.005 T) + 4.9976.

UTILIZATION OF INDONESIAN LOCAL STANNIC CHLORIDE (SnCl4) PRECURSOR IN THE PROCESS OF MAKING FLUORINE- DOPED TIN OXIDE (FTO) CONDUCTIVE GLASS Tri Arini; Latifa Hanum Lalasari; Lia Andriyah; Gennady Fahmi; F. Firdiyono
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

UTILIZATION OF INDONESIAN LOCAL STANNIC CHLORIDE (SnCl4) PRECURSOR IN THE PROCESS OF MAKING FLUORINE-DOPED TIN OXIDE (FTO) CONDUCTIVE GLASS. Thin layer of fluorine- doped tin oxide (FTO) conductive glass has been deposited on a glass substrate heated at a temperature of 350°C using the ultrasonic spray pyrolysis nebulizer method with variations in fluorine doping and substrate temperatures. This experiment uses the raw material of Indonesian local stannic chloride (SnCl4) (PT Timah Industri) as a precursor with a temperature variation of 250, 300, 350, 400°C. The structure and morphology of the optical and electrical properties of all the thin layers have been examined. XRD results show that all thin layers have a tetragonal crystal structure. In this experiment, there is a significant influence on the role of fluorine doping on resistivity and transmittance values. With the addition of 2% wt doping, the resistivity and transmittance values decrease. The optimum value is obtained by doping 2 wt%, substrate temperature of 350°C with a resistivity value of 9.28.10-5 Ω.cm and transmittance value of 88%.

UTILISATION OF SLAG POWDER FOR CEMENT SUBSTITUTION BASED ON THE COMPRESSIVE STRENGTH AND PENETRATION OF CHLORIDE IONS Yasmina Amalia; Syoni Soepriyanto
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2019.20.2.5446

UTILIZATION OF SLAG POWDER FOR CEMENT SUBSTITUTION BASED ON THE COMPRESSIVE STRENGTH AND PENETRATION OF CHLORIDE IONS. The availability of waste from nickel ore smelting in the form of slag has increased, this is due to the high nickel production to meet the increasing needs for development and for compound- ing materials for construction materials. This research aims to make a paste from the mixture of Nickel Pig Iron (NPI) slag from PT Indoferro which is used as a substitute for making cement paste. The materials used in this study are cement, nickel slag, water, and zeolite. The cement paste is made with a dimension of 10 cm x 5 cm with each slag used as an amplifier on the paste with a volume variation of 15%, 30%, 45%, and 60%. Each material is weighed according to mix design then mixing the materials, after they are homogeneous, they are put into the mold and then let stand for 24 hours until the paste solidifies and hardens, after 24 hours, the paste sample is removed from the mold and treated at room temperature, after the life is qualified, the paste sample is tested. Results of the compression test show that variations of slag addition to the paste mixture giving maximum compressive strength is the 15% variant for NPI slag. The increase in compressive strength of the slag mixture paste may occur because slag contains cement compounds which can chemically react with Calcium Hydroxide (CH) com- pounds as a result of the hydration reaction of cement with water to form a Calcium Silicate Hydrate (CSH) compound from the hydration result between water and cement to increase adhesion and compressive strength on cement paste.

SYNTHESIS AND CHARACTERIZATION OF Li4Ti5O12 WITH SOL GEL METHOD AS A LITHIUM ION-BATTERY ANODE MATERIAL Slamet Priyono; Ilma Nuroniah; Achmad Subhan; Edi Sanjaya; Bambang Prihandoko
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

SYNTHESIS AND CHARACTERIZATION OF Li4Ti5O12 WITH SOL GEL METHOD AS A LITHIUM ION-BATTERY ANODE MATERIAL. Synthesis of anode Li4Ti5O12 material has been carried out using the sol gel method. The synthesis is carried out with variations in sintering temperatures at 500 oC, 600 oC, 700 oC dan 800 oC. Characterization carried out includes testing thermal analysis to determine the optimum temperature for sintering, XRD (X-ray Diffraction) to find out the phase formation of Li4Ti5O12, Scanning electron microscope (SEM) to analyse the morphology formed, testing Cyclic voltammetry, charge-discharge and Electrochemical Impedance Spectroscopy (EIS) is carried out to find out the elec- trochemical performance. From the results of characterization of thermal and XRD analyses, the optimum temperature for synthesis is 800oC with small impurity content. The results of SEM characterization show that the morphology of the sample is not homogeneous, and the particles are agglomerated. The resulting electrochemical performance increases along with the increase in temperature for sintering, including voltammogram graphs, diffusion coefficient values, electrical conductivity and charge-discharge capacity. Of all the samples, the LTO sintered at 800oC shows good electrochemical performance with a sharp and good voltammogram graph, diffusion coefficient value of lithium ion is 1.58 × 10-9 cm2s-1, electrical conductivity of 0.6282 S/cm and the discharge capacity given is 78,07 mAh/g.

STUDY OF CERIA STABILIZED ZIRCONIA MICROSPHERES MORPHOLOGY BY SMALL-ANGLE SCATTERING AND MICROSCOPY Andon Insani; Arum Patriati; Nadi Suparno; Ratih Langenati; Siriwat Soontaranoon; Ridwan Ridwan
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2019.20.2.5474

STUDY OF CERIA STABILIZED ZIRCONIA MICROSPHERES MORPHOLOGY BY SMALL-ANGLE SCATTERING AND MICROSCOPY. Ceria stabilized zirconia microspheres of about 500 microns were prepared by external gelation. The morphology in nano and micro scale of the microsphere was evaluated. The nanostructure of CSZ microsphere after drying was studied by small angle neutron and x-ray scattering (SANS and SAXS). In this state, the existing of the mixture of ceria oxide and zirconia oxide was observed inside the polymer matrix. The roundness and surface properties of the CSZ microsphere were observed under the optical microscopy (OM) and scanning electron microscopy (SEM). The data showed their good size uniformity, smooth surface, but also the imperfect phase of the gelation.

Cover JUSAMI Vol. 20, No. 2 January 2019 Cover JUSAMI
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.566 KB)

THE EFFECT OF CALCINATION ON MICROWAVE ABSORBING PROPERTIES OF Fe3O4/TiO2 COMPOSITE Adel Fisli; Didin Sahidin WinataPura; Wisnu Ari Adi; Yana Taryana
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

THE EFFECT OF CALCINATION ON MICROWAVE ABSORBING PROPERTIES OF Fe3O4/TiO2 COMPOSITE. The Fe3O4/TiO2 composites have been fabricated by simple precipitation method for microwave absorbing. The obtained powder of Fe3O4/TiO2 which 10 % iron oxide containing were calcinated from 300oC – 700oC for 3 hours. The characteristic of samples was investigated by various techniques. The TEM image showed the composites form agglomeration with particles size of around 20 nm. The all sample contents most of the anatase phase. The increasing of calcination temperature is the bigger of crystallite size. The Raman bands shift towards lower wavenumber and their full-widths at half-maximum (FWHM) of the bands decreases as the particles size increase. The measurement of the magnetic properties illustrated that the Fe3O4/TiO2 exhibited paramagnetic behavior at room temperature. The microwave absorbing properties of the sample was measured by VNA using frequency microwave filter in X-band range (8-12 GHz). The reflection loss (RL) values were calculated for thickness 1 mm of the sample. The minimum reflectivity peak value tends to decrease with the increase of the calcination temperature due to increasing the crystallite size of the particles. The lowest reflectivity value of Fe3O4/TiO2 was occurred calcinated at 600oC with -13.4 dB loss at 10.9 GHz, that is more 80% absorbed of the electromagnetic wave in thickness 1 mm of the sample. The microwave absorption properties the calcinated 700oC the sample decrease due to the loss of magnetic properties of the sample. This study concluded that increase in average crystalline size, microwave absorption properties increased. However, the decrease dratisly of magnetic properties of the sample causes microwave absorption properties to decrease.

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