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Orientation formation of the fire cement mineral phase from Dolomite-Alumina compositions Abdul Rachman; Suhanda Suhanda; Muhammad Syaifun Nizar
Jurnal Keramik dan Gelas Indonesia Vol 26, No 1 (2017): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

The formation of the mineral phase of fine cement type mixture of calcium aluminate and magnesium aluminate has been made of a mixture of fine dolomite and alumina materials. The composition defined by cross system comparisons (75, 50, 25 : 25, 50, 75) % with the conditions and constant firing temperature 1200oC. Characterization of the test sample fired product include XRD, chemical analysis, and physical analysis, which showed the formation of the main mineral phases of calcium aluminate, magnesium aluminate and free alumina. The type and level of calcium aluminate phase stability of the composition is varied than magnesium aluminate phase; among the others forming grossit (CaAl4O7) for Al2O3 content of excess (code C) and Ca3Al2O6 for excess CaO constant (code A). Physical properties of the two types of cement fine in succession, the density are 2,0 and 2,5 gr/cm3, the porosity are 24,42 and 52,23 %, pH 10 and 8, the compression strength are 150 and 160 / 2 cm diameter of test pieces. The selected composition (C) is the best of the cement product made of dolomit -alumina. The purpose of the orientation of fire cement mineral phase formation, is to give direction forming system fire cement mixture CA / MA of dolomit alumina in the system (CaO-MgO-Al2O3) is controlled minerology and physics.

Preparation of Titanium Phosphate as Solid Electrolyte Material for Secondary Battery Handoko Setyo Kuncoro; Suhanda S; Muhammad Syaifun Nizar; Ratih Resti Astari; Didit Nur Rahman; Evvy Kartini; Bambang Prihandoko
Jurnal Keramik dan Gelas Indonesia Vol 27, No 1 (2018): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Industrialization of lithium batteries in Indonesia requires in addition to mineral technology as well as local raw material support. Solid electrolytes are one of the lithium battery cell components that determine the working stability (long life-time) of the battery and the safety of its use. In this study solid electrolyte for secondary battery with type of Lithium Aluminum Titanium Phosphate (LATP) was synthesized in variation of LATP.n% Li2O where Li2O functioned as conductivity enhancing additive with n=0,5,10. Theoretically, the largest LATP solid electrolyte content is the Titanium Phosphate (TiP) material about 80% by weight fraction, the material can be obtained from natural mineral materials such as ilmenite and apatite in Indonesia. It has qualified for the industrialization of battery components with domestic component level (TKDN) material exceeding 60%. The TiP material was prepared by sintering destruction and acid-base methods, while the LATP.n% Li2O was made using powder metallurgy and sintering method with pre-heating 400 ° C. The XRD test result shows a diffraction pattern of TiP similar to TiP pattern from other publication reference. A slight difference in the XRD pattern indicated an excess of TiO2 rutile content in TiP material and other impurities, which has also been proven by XRF test results. The SEM test result provided a micrograph showing off the crystal blocks corresponding to the shape described by other references. The LATP material made has a single and stable ionic conductivity mechanism based on the interpretation of the Cole-cole plot diagram. The result of ionic conductivity test for LATP.n% Li2O showed variation with n = 5 having conductivity (4.5x10-5 S / cm) higher than other variations.

Studi Sifat Elektronik Lapisan Nano Tunggal Sic 3c Dengan Metode Perhitungan Prinsip Pertama Muhammad Syaifun Nizar; Ayu Ratnasari
Jurnal Keramik dan Gelas Indonesia Vol 26, No 2 (2017): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Perkembangan teknologi saat ini membutuhkan semikonduktor dengan performa yang tinggi dan mengarah kepada fabrikasi transistor dengan ukuran proses node dibawah 14 nm. SiC 3C mempunyai potensi untuk dijadikan semikonduktor menggantikan semikonduktor berbasis silikon karena memiliki sifat tahan temperatur tinggi dan memikliki celah pita energi yang lebar. Sifat listrik bahan pada skala nano masih masih harus banyak penelitian yang perlu dilakukan supaya bisa dipakai sebagai bahan semikonduktor. Dengan menggunakan prinsip pertama, sifat listrik suatu bahan pada ukuran skala nano dapat diprediksi dengan simulasi komputasi, sifat elektronik lapisan tunggal nano SiC 3C dihitung density of state dan struktur pita energi. Hasil komputasi SiC 3C lapisan nano tunggal dengan ukuran 1,3 x 1,3 nm ukuran sel kristal 3x3x1 didapatkan celah pita energi sebesar -1.7 eV mirip dengan semikonduktor tipe p dengan pita konduksi minimum berada 8 eV diatas pita valensi.

The Effect Of Blue Methyl Concentration And Contact Time Toward Stain Resistance Tests On Sanytaryware Glaze Hendra Kustiawan; Muhammad Syaifun Nizar
Jurnal Keramik dan Gelas Indonesia Vol 28, No 1 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

The applications of sanitaryware glazed ceramics were exposed to a chemical substance that can leave a stain. One of the example are sanitaryware glaze which according to SNI 797:2018 must pass stain test to comply with the standard. On the SNI 797:2018 stain test procedure, one of the chemicals used are blue methyl with 0,5% concentration and 1 hour contact time. The purpose of this research is to investigate the effect of concentration and contact time duration on the stain resistance result test. Stain resistance test was carried out with methyl blue concentration 0,1-0,5% and contact time 1-24 hour on 540 samples and calculated with statistic which 461 (85.37%) samples pass stain test or unstained, and 79 (14.63%) samples failed stain test or stained. In the statistical calculation the concentration range of the dye is 0.1% -1.5% and the contact time of 1-24 hours is calculated as many as 400 samples. Concentration and contact time have a positive effect and significant on stain resistance test with a regression coefficient of 0,12% for stain color concentration and 0.92% for contact time. Based on the coefficient result, the effect of contact time is greater than the stain color concentration on the stain resistance test.

Synthesis of -TCP by Wet Precipitation Method from Natural Lime Ayu Ratnasari; Naili Sofiyaningsih; Muhammad Syaifun Nizar; Hernawan Hernawan
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6711

Beta-tricalcium phosphate (β-TCP) is a biomaterial that is widely used as bone scaffold and calcium phosphate cement. β-TCP has excellent characteristic such as biocompatible, highly solubility, and faster degradation rate than other types of calcium phosphate. In this research, β-TCP was synthesized from natural limestone and phosphoric acid. The synthesis method used is wet precipitation method. Phosporic acid solution was added by titration at rate of 0,5 mL per second. Temperature reaction controlled at 60⁰C meanwhile calcination process at 800⁰C and 1000⁰C. The mineralogy characteristic by X-Ray Diffractometer (XRD) showed that β-tricalcium phosphate main phase was formed at 800⁰C and while characterization of chemical content with X-Ray Flourescence (XRF) β-TCP has a Ca/P molar ratio of 1,35-1,37.

Synthesis of Anhydrous Dicalcium Phosphate for Precursor of Natural Ceramic Apatite Material Muhammad Syaifun Nizar; Rizky Berliana Wijayanti; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6667

Dicalcium phosphate is one of the apatite materials used for precursors to synthesize other apatite materials such as tricalcium phosphate, tetracalcium phosphate, and hydroxyapatite. Apatite materials are widely used in the medical field and pharmaceutical industry. This study aims to prepare dicalcium phosphate from natural limestone as a precursor for apatite with an easy-to-apply method for industrial scale. Wet precipitation process was performed to prepare dicalcium phosphate from phosphoric acid and slaked lime or calcium hydroxide with reaction temperature control at around 60⁰C and at pH of 3-4, then drying is carried out at about 180⁰C. The product is characterized for its mineral content by XRD and EDX. Semi-quantitative calculation of the synthesized material contains more than 90% dicalcium phosphate andhydrous, the rest is other apatite minerals. It can be used as a precursor for apatite production.

Orientation formation of the fire cement mineral phase from Dolomite-Alumina compositions Abdul Rachman; Suhanda Suhanda; Muhammad Syaifun Nizar
Jurnal Keramik dan Gelas Indonesia Vol 26, No 1 (2017): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v26i1.3916

The formation of the mineral phase of fine cement type mixture of calcium aluminate and magnesium aluminate has been made of a mixture of fine dolomite and alumina materials. The composition defined by cross system comparisons (75, 50, 25 : 25, 50, 75) % with the conditions and constant firing temperature 1200oC. Characterization of the test sample fired product include XRD, chemical analysis, and physical analysis, which showed the formation of the main mineral phases of calcium aluminate, magnesium aluminate and free alumina. The type and level of calcium aluminate phase stability of the composition is varied than magnesium aluminate phase; among the others forming grossit (CaAl4O7) for Al2O3 content of excess (code C) and Ca3Al2O6 for excess CaO constant (code A). Physical properties of the two types of cement fine in succession, the density are 2,0 and 2,5 gr/cm3, the porosity are 24,42 and 52,23 %, pH 10 and 8, the compression strength are 150 and 160 / 2 cm diameter of test pieces. The selected composition (C) is the best of the cement product made of dolomit -alumina. The purpose of the orientation of fire cement mineral phase formation, is to give direction forming system fire cement mixture CA / MA of dolomit alumina in the system (CaO-MgO-Al2O3) is controlled minerology and physics.

Preparation of Titanium Phosphate as Solid Electrolyte Material for Secondary Battery Handoko Setyo Kuncoro; Suhanda S; Muhammad Syaifun Nizar; Ratih Resti Astari; Didit Nur Rahman; Evvy Kartini; Bambang Prihandoko
Jurnal Keramik dan Gelas Indonesia Vol 27, No 1 (2018): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v27i1.3956

Industrialization of lithium batteries in Indonesia requires in addition to mineral technology as well as local raw material support. Solid electrolytes are one of the lithium battery cell components that determine the working stability (long life-time) of the battery and the safety of its use. In this study solid electrolyte for secondary battery with type of Lithium Aluminum Titanium Phosphate (LATP) was synthesized in variation of LATP.n% Li2O where Li2O functioned as conductivity enhancing additive with n=0,5,10. Theoretically, the largest LATP solid electrolyte content is the Titanium Phosphate (TiP) material about 80% by weight fraction, the material can be obtained from natural mineral materials such as ilmenite and apatite in Indonesia. It has qualified for the industrialization of battery components with domestic component level (TKDN) material exceeding 60%. The TiP material was prepared by sintering destruction and acid-base methods, while the LATP.n% Li2O was made using powder metallurgy and sintering method with pre-heating 400 ° C. The XRD test result shows a diffraction pattern of TiP similar to TiP pattern from other publication reference. A slight difference in the XRD pattern indicated an excess of TiO2 rutile content in TiP material and other impurities, which has also been proven by XRF test results. The SEM test result provided a micrograph showing off the crystal blocks corresponding to the shape described by other references. The LATP material made has a single and stable ionic conductivity mechanism based on the interpretation of the Cole-cole plot diagram. The result of ionic conductivity test for LATP.n% Li2O showed variation with n = 5 having conductivity (4.5x10-5 S / cm) higher than other variations.

Studi Sifat Elektronik Lapisan Nano Tunggal Sic 3c Dengan Metode Perhitungan Prinsip Pertama Muhammad Syaifun Nizar; Ayu Ratnasari
Jurnal Keramik dan Gelas Indonesia Vol 26, No 2 (2017): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v26i2.4122

Perkembangan teknologi saat ini membutuhkan semikonduktor dengan performa yang tinggi dan mengarah kepada fabrikasi transistor dengan ukuran proses node dibawah 14 nm. SiC 3C mempunyai potensi untuk dijadikan semikonduktor menggantikan semikonduktor berbasis silikon karena memiliki sifat tahan temperatur tinggi dan memikliki celah pita energi yang lebar. Sifat listrik bahan pada skala nano masih masih harus banyak penelitian yang perlu dilakukan supaya bisa dipakai sebagai bahan semikonduktor. Dengan menggunakan prinsip pertama, sifat listrik suatu bahan pada ukuran skala nano dapat diprediksi dengan simulasi komputasi, sifat elektronik lapisan tunggal nano SiC 3C dihitung density of state dan struktur pita energi. Hasil komputasi SiC 3C lapisan nano tunggal dengan ukuran 1,3 x 1,3 nm ukuran sel kristal 3x3x1 didapatkan celah pita energi sebesar -1.7 eV mirip dengan semikonduktor tipe p dengan pita konduksi minimum berada 8 eV diatas pita valensi.

The Effect Of Blue Methyl Concentration And Contact Time Toward Stain Resistance Tests On Sanytaryware Glaze Hendra Kustiawan; Muhammad Syaifun Nizar
Jurnal Keramik dan Gelas Indonesia Vol 28, No 1 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v28i1.5635

The applications of sanitaryware glazed ceramics were exposed to a chemical substance that can leave a stain. One of the example are sanitaryware glaze which according to SNI 797:2018 must pass stain test to comply with the standard. On the SNI 797:2018 stain test procedure, one of the chemicals used are blue methyl with 0,5% concentration and 1 hour contact time. The purpose of this research is to investigate the effect of concentration and contact time duration on the stain resistance result test. Stain resistance test was carried out with methyl blue concentration 0,1-0,5% and contact time 1-24 hour on 540 samples and calculated with statistic which 461 (85.37%) samples pass stain test or unstained, and 79 (14.63%) samples failed stain test or stained. In the statistical calculation the concentration range of the dye is 0.1% -1.5% and the contact time of 1-24 hours is calculated as many as 400 samples. Concentration and contact time have a positive effect and significant on stain resistance test with a regression coefficient of 0,12% for stain color concentration and 0.92% for contact time. Based on the coefficient result, the effect of contact time is greater than the stain color concentration on the stain resistance test.

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