IOP Conference Series: Materials Science and Engineering

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ISSN / EISSN : 17578981 / 1757899X
Current Publisher: IOP Publishing (10.1088)
Total articles ≅ 41,790
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T Nawate, Y Yamamoto, Y Kanie, S Mitsudo, Y Fujii, T Sakurai
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012032

Abstract:Electromagnetic-wave sintering of alumina ceramics using 28 GHz gyrotron has been performed aiming for a high fracture toughness value in order for use as pistons for pressure cells of high-frequency electron spin resonance (ESR) measurements. We have tried to improve the fracture toughness by using nano-sized alumina powder (140 nm in average particle size) having smaller particle size than our previous work (400 nm in average particle size). Rapid densification was observed around the sintering temperature of 1200 °C. We obtained the relative density over 99 % above 1400 °C. It was found that alumina ceramics made in this work at sintering temperatures have smaller grain size and higher density simultaneously as compared to the previous work. These results suggest that alumina ceramics made from powder of smaller particle size sintered by electromagnetic-wave sintering possibly have high fracture toughness which can be used as materials for the pressure cell for ESR.
J Gunawan, D Taufik, V Takarini, Z Hasratinigsih
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012030

Abstract:Dental porcelain is usually used for aesthetic indirect restoration. Porcelain powder is still imported, although Indonesia is rich with natural sand as porcelain raw material. Flexural strength is a mechanical property which is related to porcelain's ability to resist occlusal force. The objective of this study is to synthesize porcelain from the mixture of Sumateran and Javanese natural sand and evaluate its flexural strength. This experiment used explorative descriptive method. Feldspar Pangaribuan (65% wt), silica Belitung (25%wt), kaolinite Sukabumi (5%wt), and potassium salt (5%wt) was mixed with wet-ball mill and dissolved by fritting to produce porcelain powder. Five samples were made by liquid-phase method in size 3mm x 2cm x 7cm. XRD test was used to analyse crystalline formed and flexural strength of these samples was measured by Netzch Universal Testing Machine with 7.5kg initial load and calculated by flexural strength formula. The result was porcelain powder which has been sintered on 1150 °C contain leucite (potassium aluminium silicate) crystalline on XRF test with average flexural strength 26.678 MPa. Leucite crystalline is the main indicator for synthesizing dental porcelain because leucite is not usually found on other ceramic. Leucite crystalline is known for increasing strength, preventing crack propagation, and resisting pyroplastic flow. Ten percent of leucite on X-Ray Fluoroscence shows the percentage is less than other dental porcelain. The conclusion of this research is that porcelain succeeded to be self-synthesized from the mixture of Sumateran and Javanese natural sand and having flexural strength 26.678 MPa.
M Anas, M Jahiding, Ratna, I N Sudiana
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012035

Abstract:The activated carbon from cashew nut shell (CNS) has been prepared by physical activation. The cashew nut shell liquid (CNSL) is primarily extracted from a shell by using handed-rotary roaster kiln at the temperature around 170°C. The carbonization is done by augmenting temperature up to 350°C without taking out the CNS from kiln. The carbonized CNS is crushed and sieved of 60 mesh. While the activation process, nitrogen gas is flowed through the electric furnace with a constant flow rate and the activation temperature is varied from 400°C to 900°C. Sample then is characterized using ultimate analysis to determine composition of activated carbon including carbon (C), hydrogen (H), nitrogen (N), oxygen (O) and sulphur (S) and scanning electron microscope (SEM) and Energy Dispersive Spectroscopy (EDS) to know the surface morphology and element composition respectively and X-Ray diffraction (XRD) is used to know the structural properties. The ultimate analysis shows that carbon element in the sample increases as activation temperature increases up to 700°C of 79.80% and then decreases to 79.14% at 900°C. XRD pattern shows that it appears a broaden peak about 2θ = 24°C indicating an amorphous structure. The increasing of activation temperature tends to graphitization process of activated carbon.
N Hiron, Asep Andang, Nundang Busaeri
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012034

Abstract:The aim of this study is to investigate and analyze the NdFeB N52 type magnetic field distribution on a Trapezoidal type coil in an axial type generator. The main problems addressed by this study are how the distribution of magnetic field type NdFeB N52 to the trapezoidal type coil and how the influence of air gap between NdFeB N52 magnets and the coil to the output electric voltage generated from the coil at the speed of rotation. In order to answer the problems, we moved a rectangular type magnet axially towards the trapezoidal type coil with a specified distance, so that we could identify the change of the output voltage. The description of the magnetic field distribution in the stator was simulated by using the Maxwell 3D Design application ran in ANSYS software 16.0. The result of this study shows that the magnet was distributed evenly on the coil. It is also known that based on experiments with 2mm to 6mm of magnet to coils of gaps, the highest output voltage is at 2mm gaps at 750rpm.
S Y Azhary, D Purnama, F F Florena, M Vanitha, Muchtaridi, C Panatarani, I M Joni
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012037

Abstract:Chitosan:SiO2 nanocomposite (Cs:SiO2 NCs) is synthesized via aerosol processing. Ultrasonic spray drying apparatus was used to produce smaller sized composite particles with spherical morphology. Composite from shrimp shell and water glass (Na2SiO3) as silica precursor were used for the preparation. Cs:SiO2 NCs were characterized by Fourier Transform Infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) to know about the chemical bonding and morphology of the particles, respectively. Based on the FTIR investigation the absorption peak at 1090 cm−1 represents the reaction of silanol groups of silica with carbonyl groups of polymers leading to the formation of Si-O-C bonds. The morphology of Cs:SiO2 NCs was more spherical than chitosan particles with relatively narrow size distribution. The smaller particle size of Cs:SiO2 NCs is potentially applied to engineer the material for drug delivery system.
Sutisna, I Usrah, N Hiron, A Andang
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012024

Abstract:Online quality analysis technique of energy consumption is getting easier. It is because the sensor module and microprocessor are getting more simple, complex and possess high accuracy. This study offers an alternative to online electrical energy consumption monitoring technique by using Arduino. It is interesting to know the accuracy of the work of the Arduino-based energy quality monitoring system with high accuration measurments tool Kyoritsu power analyzer KEW 6315 and Hioki 328-20. The method of this research is the design of 1 phase electrical energy monitoring system by using current sensor type SCT-013 and voltage sensor in the form of transformator. EmonLib Library was used for processing voltage and current data in Arduino. The validation of measurement results was done by comparing the results of Arduino with Kyoritsu KEW 6315 and Hioki 328-20. The measurement reporting technique was displayed online based on the website. The results provide a clear picture of the measurement performance of the developed system, that the system has a quality of performance close to Kyoritsu type kew 6315 that against Hioki 328-20 with an average error below 5% is acceptable. The results of the measurement of electrical energy consumption had been successfully displayed in the form of a website-based energy report.
N Busaeri, A Andang, Empung, N Hiron, E Sumarsih
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012022

Abstract:This paper discusses about the measurement of optimization on feeder machine with automatic system control for aquaculture. This paper mainly aims to observe four main parts of feeding machine of aquaculture: major inlet, scale system, spiral tunnel, and throwing system. The observation done includes the energy of electricity usage of each unit of feeding weight which is processed, duration of process of each part, the exchange of rotor speeds, and the flow of feeding speed rate in gram per second. In this research, the design of feeding machine with automatic system based on Arduino Uno is conveyed. The feeds size used in this research are 2mm and 4mm. The measurement of optimization aims to consider the weight of the feeds, and the system of machine that works optimally. The result from experiment releases that the machine designed is able to work optimally on 2kg feeds of each process in 70 seconds and 71 seconds, and 0.085Wh on energy of electricity usage.
D W Maulana, Fery Faizal, F F Florena, F Alfandi, C Panatarani, I M Joni, B M Wibawa
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012010

Abstract:DC smart grid and distributed generation have evolved rapidly as the integration of renewable energy. The robustness parameter of DC smart grid can be defined by the ability of the system to maintain stability under normal or perturbed conditions and provide fast restoration after faults. This research aims to design DC smart grid to simulate the voltage stability again disturbance. A model of DC smart grid was tested by key parameters in power station such as voltage stability. Voltage stability is the ability of power system to maintain steady voltage within permissible range at all buses in reasonable condition and after having been subjected a perturbation, such as an incremental change in load. The obtained duration time for a system to recovered voltage stability problem was approximately two seconds until three seconds. It was concluded that designed DC smart grid could simulate the voltage stability disturbance.
M Vanitha, I Made Joni, B M Wibawa, C Panatarani
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012003

Abstract:Immense progress is required in the field of energy conversion and storage to achieve cost-effective high-performance batteries which could meet future energy demands. It also becomes mandatory to utilize the abundant materials from the earth's crust, along with safe conversion and storage of electrochemical reactions. In this perspective, aluminium ion batteries (AIBs) could be a viable alternative for the conventional lithium-ion batteries (LIBs). In this mini-review, we focus on the challenges and the latest growth related to the cathode active materials (metal oxides, metal sulfides and other hybrid systems) in AIBs. The development of highly efficient, low cost and safe energy storage systems based on aluminium ion batteries is much explored. Still, commercialization remains a theoretical one, hence this review highlights the significance of the developed materials and their shortcomings that need to be addressed for the commercialization of aluminium ion batteries in the future.
P Widiatmoko, H Devianto, I Nurdin, F Yusupandi, Kevino, E N Ovani
IOP Conference Series: Materials Science and Engineering, Volume 550; doi:10.1088/1757-899x/550/1/012001

Abstract:Solid Oxide Fuel Cell (SOFC) is one of the promising developments in the fuel cell system. SOFC can be applied to micro-scale combined heat and power generation (micro CHP) as a power plant in housing. Recently, intermediate-temperature SOFC (500-700°C) is being widely developed since cheaper than the conventional SOFC (~1000°C). Intermediate-temperature and conventional SOFC are less developed in Indonesia due to expensive electrode and electrolyte materials, such as Yttria and Lanthanum, which are not available in Indonesia. This study aims to develop a novel disk-shaped single cell SOFC based on materials from Indonesia's resources. Calcia Cobalt Zinc Oxide (CCZO) is an alternative cathode to replace conventional cathode such as Lanthanum Strontium Manganite (LSM). CCZO cathode was made using spray coating. Calcia can also substitute Ytrria as a stabilizer of zirconia in electrolyte fabrication. Calcia-stabilized Zirconia (CSZ) electrolyte was produced using spray coating. NiO anode was fabricated through hydraulic pressing. The single cell was operated using hydrogen (125 sccm) as a fuel and ambient air (500 sccm) as an oxidant. The results showed an open-circuit voltage (OCV) of 0.577, 0.558, and 0.513 V and produced the maximum power densities of 1.4, 2.8, and 10 mW m−2 at 500, 600, and 700°C, respectively. Measurement of the cell impedance indicated that the overall resistance decreased with increasing temperature.