Journal of Technomaterial Physics <p>Journal of Technomaterial Physics (JoTP) is a peer-review national journal that is published twice a year, in February and August. JoTP provides an open access policy for the writer and free publication charge. Due to its open access policy, JoTP serves online publication and a fast review process. The scope of this journal are:</p> <ol> <li>Theoretical Physics</li> <li>Applied Physics</li> <li>Material Physics</li> <li>Computational Physics and Machine Learning</li> <li>Experimental Physics</li> <li>Nuclear Physics and Particle Physics</li> <li>Biophysics and Medical Physics</li> <li>Geophysics</li> <li>Energy and Energy Conversion</li> <li>Advanced Materials (photonics, nanomaterial, and nanotechnology)</li> <li>Electronics and Electrical Engineering</li> <li>Metrology</li> </ol> <p>JoTP receives an original article with the maximum length of 10 pages and provides an open access policy for the writers and free publication charge.</p> <p> </p> Talenta Publisher en-US Journal of Technomaterial Physics 2656-0747 Effect of Fiber Length on The Composite Properties of Salacca zalacca Pellet Fibers – Epoxy <p>Research on the effect of fiber length on the physical and mechanical properties of composite fibers has been conducted, with variations in fiber lengths of 1 cm, 1.2 cm, 1.4 cm, and 1.6 cm, each added Epoxy and Hardener 1: 1 then stirred by the Hand Lay Up method and pressed for 20 minutes at a temperature of 90ºC. The characterization of composite physical properties showed a density value of 1.1325 g/cm<sup>3</sup>, porosity by 1.53%, and water absorption by 1.33%. The physical properties of composites have met the standard SNI 03-2105-2006 and can be used as a composite replacement material. The characterization of the composite mechanical properties shows a maximum bending strong value of 25.15 kgf – 40.12 kgf, tensile strength of 11.31 MPa – 15.37 MPa, and a strong impact of 50.43 J/mm<sup>2</sup>-80.93 J/mm<sup>2</sup> has met high impact ABS quality standards of 13.48 J/m<sup>2</sup>. All mechanical properties of the composite meet the JIS A 5905:2003 standard.</p> Andreas Perdinan Sinuhaji Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 1 9 10.32734/jotp.v4i1.6914 Effect of Mass Addition on Physical Properties and Mechanical Properties of Agave Sisalana Fiber Composites - Epoxy <p>Research on the effect of the addition of <em>Agave Sisalana</em> fiber mass on physical properties and mechanical properties in sisal-epoxy fiber composites has been conducted as an alternative material for composite materials. <em>Agave Sisalana</em> fiber was taken from Sumber Agung Village of Rejo Stage District of Blitar Regency, East Java. <em>Agave Sisalana</em> fiber as a filler varies the composition of fiber mass 0 g, 2 g, 4 g, 6 g, and 8 g. The results of testing the physical and mechanical properties of <em>Agave Sisalana</em> fiber composites produce a density value of 1.064 g/cm<sup>3</sup> - 1.335 g/cm<sup>3</sup>, water absorption 1.59% - 2.62%, porosity 1.7% - 3.5%, strong bending 54.542 MPa - 86.412 MPa, strong impact 29.92 kJ/m<sup>2</sup> – 98.32 kJ/m<sup>2</sup>, and strong tensile 1.983 MPa – 12.368 MPa. The physical and mechanical properties testing results have met JIS A 5905:2003 Standards, namely strong bending &gt;32 MPa, the density of 0.3-1.3 g/cm<sup>3</sup>, and water content &lt; 25%. <em>Agave Sisalana</em> fiber composites with epoxy resin can be applied to car bumpers.</p> Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 10 17 10.32734/jotp.v4i1.7082 Utilization of Scallop Shells (Placuna placenta) for Potential Water Filter Prototype in Jaring Halus Village, Jaring Halus-Langkat District and the Characterization Test <p>Indonesia is a maritime country that has abundant marine wealth. Unfortunately, most fishers still live in poor conditions, including Jaring Halus Village, Secanggang District, Langkat Regency, North Sumatra Province. Previous research has shown that there is much coastal waste, such as Scallop Shells (<em>Placuna</em> <em>placenta</em>), that are not treated, even though it has the potential to help people who are experiencing water crises to get clean water sources. This study aimed to characterize the shells of Scallops and produce calcium carbonate as an activated carbon product to produce clean water. The method used to characterize the mashed scallop shells is X-Ray Diffraction (XRD). In this study, three different sizes, namely 25 μm, 90 μm, and 150 μm, will be compared, and the size and quality selected to produce the best calcium carbonate were tested at different temperatures, namely 800°C, 900°C, 1000°C, and 1100°C. In the x-ray diffraction analysis test, the smallest particle is 25 μm, which has the highest intensity compared to other sizes. The best particle size, which is heated/calcined at a temperature of 1100, has the highest intensity, which can remove all impurities and produce natural calcium carbonate, which is more stable. Based on the study results, it can be concluded that the best calcium carbonate is produced from particles with a size of 25 μm which are calcined at the highest temperature of 1100°C.</p> Muhammad Sontang Sihotang Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 18 23 10.32734/jotp.v4i1.7395 Design of Steel Plate Grasping Vacuum Equipment on TruLaser 3030 with Servo Motor <p>A <em>vacuum gripper</em> is a device that uses a vacuum cup as a suction device and holds the workpiece load so that the workpiece can go through the process of moving from one position to another. In this research, the gripping vacuum is the main tool in the sheet metal material transfer machine so that the material can be easily moved from the wooden pallet to the TruLaser 3030 fiber machine table. The process of making this machine design requires careful calculation of the formula so that the appropriate machine components are obtained to lift material loads. The components needed in the design of this machine include a gripper vacuum, servo motor, load-bearing shaft, transmission drive, gear transmission, and a steel frame using a 300 x 300 Wide Flange Beam as a support for the whole machine. The sheet metal material used as the load is SS400 material sheet metal with a thickness of 15 mm and an area dimension of 2.44 m x 1.22 m. For this reason, strong components are needed and can withstand vertical and horizontal loads from the movement of materials and the load of the sheet metal material itself. It is recommended to use a suction motor on a gripping vacuum with a suction power of 48 m3/hour and electric power of 1.3 kW. In addition, the servo motor used must be able to withstand a load of 350 kg with a design power of 171.7 watts and a torque of 93 Nm, and straight gears with a ratio of 4:3.</p> Ambrosius Vitoaji Kepra Wijaya Melya Dyanasari Sebayang Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 24 35 10.32734/jotp.v4i1.7617 Synthesis of Cathode Active Material LiMn0.5Fe0.5PO4F/C with Sintering Time Variation <p>Research has been carried out on the synthesis of LiMn<sub>0.5</sub>Fe<sub>0.5</sub>PO<sub>4</sub>F/C, the cathode active materials with variations in sintering time. The process of producing the LiMn<sub>0,5</sub>Fe<sub>0,5</sub>PO<sub>4</sub>F/C as an active material in lithium battery cathodes has been successfully carried out by the first forming host structure and then infiltrating the lithium Li ions and the flour F ions. In this study, the synthesis was carried out with various sintering time, 6 hours, 8 hours and 10 hours. The raw materials used in this study are manganese dioxide (“MnO<sub>2</sub>”), iron (III) oxide (“Fe<sub>2</sub>O<sub>3</sub>”), lithium fluoride (“LiF”) and phosphoric acid (“H<sub>3</sub>PO<sub>4</sub>”) as the solvents. The synthesis was carried out at a calcination temperature of 720°C for 8 hours. The first mashed use a milling process for about 180 minutes, and placed into the oven, then mashed using a mortar. Then the Mn<sub>0.5</sub>Fe<sub>0.5</sub>PO<sub>4</sub> sample was added with LiF, mixed with the milling process, placed into a drying oven and was varied with the sintering time of 6 hours for the first sample, 8 hours for the second sample and 10 hours for the third sample. As to produce LiMn<sub>0.5</sub>Fe<sub>0.5</sub>PO<sub>4</sub>F material, followed by carbon coating, namely tapioca and sugar (8%:4%). All three samples were calcined at a temperature of 720°C for 4 hours. The results of XRD analysis showed that the three samples did not experience a phase of change, however only shows a few differences in intensity. The results of FESEM analysis show that grain growth occurs vertically and horizontally due to the presence of the Mn and Fe, and with an exact enough amount of tapioca function as a carbon source to coat the active material, it help to creates pores in the powder so that the presence of these pores could provide an intercalation pathway for the lithium ions. At the end the results of the EIS analysis showed that the highest conductivity value of this study was 0.62 x 10<sup>-5</sup> S/cm.</p> Mitra M Simaremare Bambang Prihandoko Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 36 45 10.32734/jotp.v4i1.7758 Development of Mortar for Repair of Cracked Concrete with Injection Method <p>This study aimed to develop a mortar with the addition of glass fiber as a mortar reinforcement with variations in the addition of glass fiber (0 gram; 5.99 grams; 17.97 grams) which was homogenized with variations in the addition of aggregate (5.32 kg; 2.66 kg; 0 kg) and cement variations (1.56 kg; 3.41 kg; 5.25 kg). Mortar is used as a material for repairing cracked concrete by using the injection method. The mortar tests carried out were mortar flow testing, flexural strength testing, compressive strength testing, adhesive strength testing, and OM observations. The results of the mortar flow test with a mixture of cement without aggregate and the addition of 5.99 grams of glass fiber showed that the mortar could flow in gaps of 1 mm, 3 mm, and 5 mm. The optimum flexural strength test results with the addition of glass fiber are that the cement mixture is more than the aggregate with glass fiber 17.97 gram, the flexural strength value of the mortar is 0.74 MPa. While the optimum compressive strength with the addition of glass fiber is a mixture of more cement than aggregate with glass fiber 17,97 gram, the compressive strength value of mortar is 16.6 MPa. The results of the optimum mortar adhesive strength test value flowing in a gap are the addition of 5.99 grams of glass fiber; the mortar adhesive strength value is 3.31 MPa. Based on the results of observations using OM, the glass fiber that binds or can blend with the mortar is a mixture of cement without the addition of aggregates.</p> HARDIANTI MANALU Agus Sukarto Wismogroho Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 46 53 10.32734/jotp.v4i1.7779 Effect of Additional Cu on Structural and Optical Properties of TiO2 Synthesized with Sol-Gel Method <p>In this study, TiO<sub>2</sub> doped with Cu has been successfully synthesized using the sol-gel method by varying the addition of Cu and the calcination temperature. Sample preparation was started by mixing 0.75 mL of 37% HCl in 49.25 mL of 96% ethanol and stirred with a magnetic stirrer for 10 minutes. Then 10 mL of TTIP (Titanium Tetraisopropoxide) was added dropwise using a dropper and the solution was stirred again with a magnetic stirrer for 60 minutes. Then added Cu with variations of 1%, 2%, 3%, 4%, and 5% and stirred again for 60 minutes using a magnetic stirrer. The sol solution was then put into the furnace at a temperature of 100°C for 3 days. The crystalline sol solution was then mashed with a mortar to a submicron size, then washed with 50 mL of Aquades and stirred using a magnetic stirrer for 10 minutes. The washed samples were then dried in a furnace at a temperature of 100°C for 1 day. Followed by calcination for 3 hours with temperature variations of 450°C, 500°C, 550°C and 600°C to release the gases in the nanoparticles. Cu-doped TiO<sub>2</sub> nanoparticles were characterized using test equipment such as XRD, SEM-EDX, and UV-Vis. From the results of XRD analysis obtained 3 phases namely Brookite, Rutile and Anastase, and the crystal size is unstable and the shape of the sample particles is tetragonal. The results of the SEM-EDX analysis showed that the content of the sample was in accordance with the experiments that had been carried out. The results of UV-Vis analysis show that the wavelength is inversely proportional to the bandgap energy.</p> Anggi Natasya Sidauruk Muhamad Ikhlasul Amal Eddy Marlianto Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 54 62 10.32734/jotp.v4i1.7851 Synthesis of Conductive Carbon Sheet From Coconut Fiber with the Addition of Potassium Hydroxide (KOH) Activator <p>Research has been carried out on manufacturing conductive carbon sheets using carbon as raw material from coconut fiber with a Potassium Hydroxide (KOH) activator. First, activation was carried out using 1000 ml of 6M KOH solution mixed with 100 grams of carbon at 100℃ for 72 hours. Next, the carbon is pyrolyzed at temperatures of 900℃, 1100℃, and 1300℃ for 2 hours. Next, the pyrolysis carbon was washed with 2M HCl for 24 hours and washed with distilled water until the pH was neutral. Electrical resistance measurements were made with torque variations of 10, 20, and 30 kgf. cm using the four-point probe method, then the conductivity value was calculated. Finally, carbon characterization was carried out using the XRD tool. The increase in pyrolysis temperature causes the carbon conductivity to increase, which is 2.3855- 4.2340 S/cm at 900℃ and 6.8203-11.4577 S/cm at 1300℃. XRD analysis showed a sharp and narrow increase in diffraction peaks with each increase in pyrolysis temperature, indicating that carbon has a crystal structure close to graphite which is more ordered than carbon without an activator.</p> Dian Surya Sinaga Nanik Indayaningsih Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 63 67 10.32734/jotp.v4i1.8177 XRD Analysis of Li4Ti5O12 with Post Heat Treatment for Lithium-ion Capacitor (LIC) Applications <p>Characterization of XRD-analysis on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> with post heat treatment for applications Lithium-ion Capacitor (LIC) has been conducted. The powder method was used in the analysis, whereas the samples were prepared using the sol-gel method. The anode material Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> precursor was sintered at 850°C for 4 hours and followed by heat-treatment at 600<sup>o</sup>C for 3 hours. Characterization of structural (XRD analysis) was applied to determine the formation of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> phase. The results of the characterization were formed Lithium titanate (Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>) and rutile phase (TiO<sub>2</sub>) with crystallite size on LTO I of 82.52 nm and LTO II of 92.07 nm. Overall, post heat treatment of anode Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> succeeded in improving the quality and electrochemical performance for Lithium-ion Capacitor (LIC) application.</p> Syahrul Humaidi Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 68 72 10.32734/jotp.v4i1.8154 Effect of Solid Content in Electrochemical Performance of Graphite Anode of Lithium-ion Batteries <p>Rechargeable batteries have been implemented in most portable electronic devices. Lithium-ion battery (LIB), as the main power source, dominates the mobile device market due to its high energy density, long shelf life, and environmentally friendly operation. In the rechargeable lithium-ion battery, there are four main components, one of which is the anode. The anode material used is commercial graphite. Thus, this study aims to determine the effect of solid content solvents on battery performance. The main discussion in this study is to analyze the effect of solvent variations of N, N Dimethyl Acetamide (DMAC) on the characteristics of the sheet and the difference in solid content of graphite anode sheets on battery performance. Identification of the formed phase was carried out by XRD, reduction and oxidation reactions by cyclic voltammetry test, battery capacity by charge/discharge test, and study of the electrochemical characteristics of the electrode material by electrochemical impedance spectroscopy test. The best anode sheet is produced by mixing 2.5 mL DMAC solvent at a thickness of 0.07 mm with a solid content of 25%. The results of the charge-discharge test showed a specific capacity of 309.33 mAh/g in the first cycle.</p> Leyoni Metanencya Butarbutar Slamet Priyono Copyright (c) 2022 Journal of Technomaterial Physics 2022-02-28 2022-02-28 4 1 73 79 10.32734/jotp.v4i1.7731