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Rifki Septawendar
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Jl. Jenderal Ahmad Yani No. 392 Bandung
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INDONESIA
Jurnal Keramik dan Gelas Indonesia
Published by Balai Besar Keramik
ISSN : 08545405     EISSN : 26228114     DOI : https://doi.org/10.32537/jkgi
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Materials Science & Nanotechnology
The JKGI contains papers of original research that provide or lead to fundamental principles in the science of ceramics, functional ceramics and ceramic-based composites. These articles include reports of the discovery of new phases, phase relationships, processing approaches and microstructures that relate to ceramic materials and processes. The articles establish the links between processing, structure characterization and properties of ceramics, including modeling approaches that are founded on basic mechanisms. All the published papers must be of enduring value and relevant to the field of ceramics.
Arjuna Subject : Ilmu Material (semua kategori) - Keramik dan Komposit
Articles 7 Documents
 1 
Search results for , issue "Vol 30, No 1 (2021): Jurnal Keramik dan Gelas Indonesia" : 7 Documents clear
hal depan jkgi vol.30 no.1 rifki septawendar
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.v30i1.7169

Abstract

Synthesis and Characterization of Ca3Co4O9 Ceramic by using Sol-Gel Method Sigit Dwi Yudanto; Septian Adi Chandra; Rahadian Roberto; Dedi Pria Utama; Lusiana -; Wafi Ahdilah; Virginia Octa Herlina
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.v30i1.6839

Abstract

We report the synthesis  of Ca3Co4O9  ceramics by the Sol-Gel method with citric acid as the chelating agent.   Calcium   nitrate   and   cobalt   nitrate   as precursors were weighed at an atomic ratio of Ca: Co = 3: 4. The process starts with gel preparation, followed by drying, calcination, and compaction process. The pellets were sintered at 820°C, 860°C, and 900°C for 6 hours in a furnace without flowing gas. The effect of sintering temperature on the formation of the Ca3Co4O9  phase was analyzed using an X-ray diffractometer.  The  Ca3Co4O9   phase has  formed in samples sintered at 820°C with the Co3O4  phase as an impurity. Based on the calculation, the crystallite size decreases with increasing sintering temperature
hal belakang jkgi vol.30 no.1 rifki septawendar
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.v30i1.7173

Abstract

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.
SYNTHESIS OF ZrO2 VIA ULTRASONIC ASSISTED PRECIPITATION METHOD FOR PHOTODEGRADATION OF METHYLENE BLUE Soni Setiadji; Nur Tursina; Nanda Dwimar Hakim; Sanusi Sanusi; Tety Sudiarti; Dani Gustaman Syarif
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.v30i1.6807

Abstract

Zirconium dioxide (ZrO2) is a semiconductor material which its photocatalytic properties for degradation of methylene blue has been investigated in this research. ZrO2 was prepared from ZrCl4 solution by adding NaOH through precipitation method without ultrasonication, and also with ultrasonication for 1 h and 2 h. The specimens of ZrO2 were analyzed by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Brunauer-Emmett-Teller (BET). The XRD of all ZrO2 samples showed that the smallest ZrO2 crystal size was 8.149 nm based on Debye-Scherrer calculations for ultrasonic time of 2 h. The lattice parameter of ZrO2 under tetragonal phase was analyzed using Rietvield refinement by La Beil method. The specific surface area of all ZrO2 specimens were confirmed by BET. The result showed specific surface area of 99.741 m2/g for treatment with 2 h ultrasonication. The effect of ultrasonic assisted precipitation could increase the photocatalytic activity. This result showed that the degradation of methylene blue by ZrO2 with 2 h ultrasonication is higher than both by ZrO2 with 1 h ultrasonication and ZrO2 without ultrasonication with values of 93.00 %, 88.32 % and 77.53 % respectively, at 120 min irradiation, pH of 10 and 0.05 g of ZrO2 
Potential Utilization of Kaolin from South Kalimantan as a Substitute for Import Clay in Cement Board Making Faiza Elisa Hasfianti; I Gede Dewa Putra Prabawa; Nurhidayati Nurhidayati; Rinnie Nintasari; Nurmilatina Nurmilatina
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.v30i1.6610

Abstract

The   cement   board   industry   in   Indonesia   still depends   on   imported   materials,   such   as   the cement  board  industry  in South Kalimantan which  still uses clay  raw materials  from  Taiwan.  Limited  information  on  the potential use of local clay as an important clay substitution is the reason this research is needed. Identification of local clay factors was carried out by XRD, XRF, and SEM testing. The kaolin that was  tested was the kaolin Tatakan and Limamar. The   results  of  the  analysis   of  the  kaolin  material  were compared  with  the imported clay. The analysis  showed that the   clay   used   by   the  industry   was   illite  with  the  main compound  content  of  SiO2  (54.63%)  and  Al2O3  (28.23%). The results of the analysis of local clay (kaolin) tests showed that the content of compounds with imported clay was shown by kaolin placemat (SiO2  55.92%, Al2O3 29.13%), kaolin Limamar (SiO2  55.04%, Al2O3 32.71%). The quality of the application of kaolin as  a substitute for imported clay in the manufacture of cement board on a laboratory scale shows the result  that  is  not much different in the density  and porosity values.  The  strength  value  of  cement  board  with  kaolin limitation  gives  a  high  enough  value  but  it  is  below  the standard value for PT SNI's cement board product. 

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