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INDONESIA
Jurnal Keramik dan Gelas Indonesia
Published by Kementerian Perindustrian Republik Indonesia
ISSN : -     EISSN : -     DOI : -
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Articles 89 Documents
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Composation of Polyaluminum Chloride with Hydroxyapatite and Its Application for Separation of Hexavalent Chromium Ions Basril Simbarta Tarigan; Rukiah Rukiah; Atiek Rostika Noviyanti
Jurnal Keramik dan Gelas Indonesia Vol 30, No 1 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i1.6831

Abstract

Chromium  is  the  dominant  heavy  metal  in  liquid waste from the leather tanning industry, wood preservation   and   textile   processing. Generally chromium    waste   is   found   as   trivalent   and hexavalent chromium ions. Hexavalent chromium ion is dangerous  for  humans  because  of  its  carcinogenic  nature, which  can  lead  to  skin  irritation,  lung  cancer,  kidney  and stomach disorders. Coagulation-flocculation (CF) is  a method used to reduce hexavalent chromium ion levels. Polialuminum chloride (PAC) has been widely used in water treatm ent using the  CF  method.  Unfortunately,  however,  the  PAC stability  is poor, the coagulation efficiency  is  low, and the floc formation time is slow. In addition, PAC can produce Al3+ which is toxic in processed water. But its  toxicity  can be overcome by adding donor   ligands   that   contain   oxygen   such   as   hydroxides, carboxylic acids and phosphates, such as hydroxyapatite (HA). In  addition,  the addition of HA with the optimum  composition and pH at PAC can increase the performance of PAC. This study aims to optimize the PAC/HA combination at various pH so as to reduce the concentration of hexavalent chromium ion, controlled by UV-VIS spectroscopy. The highest reduction in Cr (VI) ion content was obtained by PAC, but the highest stability was obtained by the composition of PAC/HA 4: 6.
Fabrication of Cordierite Ceramic Foam Filter by Replication Method Ria Julyana Manullang; Maulid purnawan; Dede Taufik; Ayu Ratnasari; Karlina Noordiningsih
Jurnal Keramik dan Gelas Indonesia Vol 30, No 1 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i1.6855

Abstract

Ceramic foam filter (CFF) is widely used to improve the   quality   of   molten   metal   prior   to   casting. Cordierite  is  one  of  the  most  commonly  used materials  for making CFF. In this  research,  the fabrication of cordierite-based   CFF   by   a   replication   method   using   a polyurethane template has been studied. Waterglass and polymethacrylic acid (PMAA) were used as defloculants to synthesize ceramic  suspensions. CFF was made from kaolin, talc, alumina with a defloculant concentration of 0.3% which is sintered at a temperature of 1300 - 1350oC. The experimental results  showed that the porosity obtained for all CFF samples were  above  70%.  The  best  shape  of  CFF  was  obtained  by using PMAA as  defloculant. However, CFF did not reach the maximum  strength yet so it is necessary to carry out further research on the CFF body composition.
Modification of Silica as a Sealing Rubber Filler with Coupling Agents Hexamethyldisilazane (HDMS) and Methyltriethoxysilane (MTES) Shely Octavania; Eneng Maryani; Hernawan Hernawan; Lintong Sopandi Hutahaean; Untung Prayudie
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7407

Abstract

Materials that can be used in the manufacture of LPG cylinder sealant rubber is silica. However, easily agglomerates so it is not compatible with rubber. Therefore, the silica surface must be modified to reduce agglomeration and improve compatibility with rubber. This study aims to determine the effect of silica modification on the characteristics of LPG cylinder sealing rubber produced. Silica modification is carried out using 2 (two) types of coupling agents, namely HMDS and MTES with and without Si-69. Preparation of rubber compound with SIR 20 raw material is carried out using an open mill tool with a modified silica filler dose of 40 phr. The characteristics of rubber tested were compound maturity test using a Rheometer and tensile strength and elongation at break using a Universal Testing Machine. The test results show that silica modification can accelerate the maturation time of the compound and increase the tensile strength and elongation at break. The maturation time of the rubber compound with silica filler modified by MTES and HMDS was 7 minutes 36 seconds and 7 minutes 53 seconds. The resulting tensile strength and elongation values are 18.8 MPa and 720% (MTES) and 19.0 MPa and 770% (HMDS). The use of MTES and Si-69 as coupling agent for silica produced rubber with tensile strength and elongation at break of 15.9 MPa and 660%.
Study of The Interaction Carbondioxide Gas with Hydroxyapatite Using Density Functional Theory Atiek Rostika Noviyanti; Azhari Yusuf; Yeni Wahyuni Hartati; Budi Adiperdana
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7175

Abstract

Hydroxyapatite (HA) is a phosphate mineral with Ca10(PO4)6(OH)2 chemical formula. The hydroxyl group in HA allows ion to exchange, so this material may be applied as a CO2 gas sensor. The interaction between HA with CO2 gas is difficult to observe directly, and ab initio modeling is necessarily to investigate the interactions between HA with CO2 gas. In this study, a simulation was conducted using the density functional theory method to determine the interaction between CO2 gas on the surface of HA. The simulation results indicate that a large HA surface is required for optimal CO2 gas adsorption. Pore diameter size needs to be larger than 2.5 Å to prevent binding on two sides of the surface pores. 
Hal depan JKGI Vol. 30 No 2 Desember 2021 Naili Sofiyaningsih ST, MSi
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7630

Abstract

Synthesis and Characterization of Silicon Carbide-Carbon Composite (SiC-C) from Rice Husk Using Magnesiothermic Reduction Solihudin Solihudin; Haryono MT
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7419

Abstract

Silicon carbide (SiC) and SiC-C composite are non-oxide materials with good thermal properties so that they can be widely applied in industry. SiC can be synthesized by the magnesiothermic reduction method at a relatively lower temperature compared to carbothermal reduction. Rice husk charcoal has potential silicon and carbon content so that it can be used as a base material for the manufacture of SiC. This study aims to study the effect of calcination temperature in argon gas medium on the formation of SiC-C composites from rice husk charcoal reduction products using the magnesiothermic reduction method. The research methods include carbonization of rice husks, synthesis of SiC with magnesiothermic reduction method, calcination in argon gas medium for reduction products, and product purification, and product characterization. Calcination at the SiC-C composite formation stage was carried out at various temperatures of 700 and 1000 oC. The synthesized products were further characterized by FT-IR and XRD. Characterization by FT-IR showed that SiC was formed by magnesiothermic reduction method, while based on characterization by XRD, calcination at 700 oC in argon gas medium to the reduction product produced SiC-C composites with the highest content.
Hal belakang JKGI Vol. 30 No 2 Desember 2021 Naili Sofiyaningsih ST, MSi
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7631

Abstract

Synthesis And Characterization of Hydroxyapatite-Gibbsite Ferry arifiadi; Kristanto Wahyudi; Ria Julyana Manullang; Nurhidayati Nurhidayati; Hasna Rofifah Novianti
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7278

Abstract

Hydroxyapatite (HAp) is a material that is often used in biomedical applications. However, this material has poor mechanical properties so that its use is still limited and needs to be modified by adding other materials to obtain better mechanical properties. In this study, synthesis was carried out by adding gibbsite to HAp with variations in the ratio of HAp/gibsite (% by weight) and heating at 1200oC for 2 hours. The results obtained are HAp-Gibsite which has a change in the mineral phase and mechanical properties according to the ratio of HAp/Gibsite (% by weight). The mechanical properties of the sample increased with the addition of gibbsite up to 60% by weight with the best conditions achieved with the addition of 20% gibbsite, namely the compressive strength value of 227 Mpa and vicker hardness of 5.54 Gpa. The addition of gibbsite greater than 60% by weight tends to cause a decrease in the mechanical properties of the sample due to the more decomposition of HAp into -TCP and the effect of excess alumina which increases the porosity of the sample
The Effect of Aging Time on Biosynthesis of Zirconia Nanoparticles by Nanocellulose Templates Ratih Resti Astari; Didit Nur Rahman; Rifki Septawendar; Bambang Sunendar Purwasasmita
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7409

Abstract

In this study, the biosynthesis of ZrO2 nanomaterials was carried out using nano cellulose template from the biomass of oil palm empty fruit bunches (Elaeis guineensis). The purpose of this study was to determine the effect of nanocellulose from oil palm empty fruit bunches as a template and aging time in the formation of ZrO2 nanoparticles. The method in this research for synthesis of ZrO2 nanoparticles is the template-precursor method. The biosynthesis of ZrO2 nanoparticles calcined at 600 °C produced a metastable tetragonal phase with a nanorod-like morphology with diameter <100 nm, length <200 nm and agglomeration of nanoparticles with an average particle size of 13 nm - 17 nm.

Page 9 of 9 | Total Record : 89

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