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Abdul Rachman
Balai Besar Keramik
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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3239.706 KB) | DOI: 10.32537/jkgi.v26i1.3916

Abstract

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.
Study of Technoeconomic Synthetic Bone Ash Production Abdul Rachman; Kristanto Wahyudi
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 | Full PDF (4357.63 KB) | DOI: 10.32537/jkgi.v26i1.3918

Abstract

Balai Besar Keramik has succeeded in producing synthetic bone ash from natural limestone and phosphoric acid. Characteristic of synthetic bone ash has a purity of  ≥  98%, white degree (brightness 90.59 and whiteness 89,42), ratio of Ca / P 1,64. Synthetic Bone ash is not inferior to bone ash from bovine bone combustion so it can be used as an alternative raw material for bone china ceramic body. The technoeconomic studies have been analyzed with assumption for the production capacity of 30 tons per month of synthetic bone ash, 5 years investment age will require initial investment cost of Rp. 3,667,083,700, - and total production cost per year is Rp. 4.059.279.000, -. With the selling price of synthetic bone ash products Rp.16.000, - / kg, will get the value of NPV in the 5th year of Rp. 557.517.242,27, -, IRR of 18.36%,  BCR of 1,135, BEP units: 982,774 kg, BEP sales: Rp. 15,724,389,020, - and Payback Period is 3.08 years. The results indicate that bone ash production is feasible according to financial criteria.
Karakteristik Mineralogi Material Biokeramik Jenis Kalsium Fosfat Dari Cangkang Kerang Simping Abdul Rachman; Naili Sofyaningsih; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 27, No 2 (2018): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (624.946 KB) | DOI: 10.32537/jkgi.v27i2.3952

Abstract

Cangkang kerang simping (Amusium pleuronectes) di kab. Brebes telah dimanfaatkan sebagai bahan baku kerajinan hiasan dinding. Untuk memberi nilai tambah yang lebih tinggi, cangkang kerang simping bisa digunakan sebagai prekursor kapur untuk membentuk material biokeramik jenis kalsium fosfat dengan metode presipitasi. Proses sintesis dilakukan dengan metode presipitasi basah dengan pengaturan pH 6-7, 7-8 dan 8-9 serta kalsinasi pada suhu 800oC-900oC. Hasil mineralogi dengan menggunakan XRD menunjukkan bahwa suhu kalsinasi tidak memberikan perbedaan bentuk kristal yang signifikan, baik pada suhu 800oC maupun 900oC, namun pengaturan pH sangat berpengaruh terhadap pembentukanfasa mineral. Fasa mineral β-trikalsiumfosfat cenderung terbentuk pada pH 6-7 dan pH 7-8 sedangkan mineral hidroksiapatit (HAp) akan terbentuk pada pengaturan pH 8-9. Hasil analisis gugus fungsi (FTIR) pada pH7-8 menunjukkan bahwa pita serapan vibrasi gugus OH pada panjang gelombang 3650-3000 cm-1 tidak terjadi sehingga fasa mineral yang terbentuk merupakan β-trikalsiumfosfat sedangkan pada pH 8-9 dan suhu kalsinasi 900ºC menunjukkan adanya spektrum dengan pita serapan yang khas pada bilangan gelombang 555,50 dan 609,51 cm-1serta vibrasi gugus OH pada panjang gelombang 3650-3000 cm-1 yang menandakan terjadinya pembentukan fasa mineral hidroksiapatit (HAp).
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

Abstract

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.
Study of Technoeconomic Synthetic Bone Ash Production Abdul Rachman; Kristanto Wahyudi
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.v26i1.3918

Abstract

Balai Besar Keramik has succeeded in producing synthetic bone ash from natural limestone and phosphoric acid. Characteristic of synthetic bone ash has a purity of  ≥  98%, white degree (brightness 90.59 and whiteness 89,42), ratio of Ca / P 1,64. Synthetic Bone ash is not inferior to bone ash from bovine bone combustion so it can be used as an alternative raw material for bone china ceramic body. The technoeconomic studies have been analyzed with assumption for the production capacity of 30 tons per month of synthetic bone ash, 5 years investment age will require initial investment cost of Rp. 3,667,083,700, - and total production cost per year is Rp. 4.059.279.000, -. With the selling price of synthetic bone ash products Rp.16.000, - / kg, will get the value of NPV in the 5th year of Rp. 557.517.242,27, -, IRR of 18.36%,  BCR of 1,135, BEP units: 982,774 kg, BEP sales: Rp. 15,724,389,020, - and Payback Period is 3.08 years. The results indicate that bone ash production is feasible according to financial criteria.
Karakteristik Mineralogi Material Biokeramik Jenis Kalsium Fosfat Dari Cangkang Kerang Simping Abdul Rachman; Naili Sofyaningsih; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 27, No 2 (2018): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v27i2.3952

Abstract

Cangkang kerang simping (Amusium pleuronectes) di kab. Brebes telah dimanfaatkan sebagai bahan baku kerajinan hiasan dinding. Untuk memberi nilai tambah yang lebih tinggi, cangkang kerang simping bisa digunakan sebagai prekursor kapur untuk membentuk material biokeramik jenis kalsium fosfat dengan metode presipitasi. Proses sintesis dilakukan dengan metode presipitasi basah dengan pengaturan pH 6-7, 7-8 dan 8-9 serta kalsinasi pada suhu 800oC-900oC. Hasil mineralogi dengan menggunakan XRD menunjukkan bahwa suhu kalsinasi tidak memberikan perbedaan bentuk kristal yang signifikan, baik pada suhu 800oC maupun 900oC, namun pengaturan pH sangat berpengaruh terhadap pembentukanfasa mineral. Fasa mineral β-trikalsiumfosfat cenderung terbentuk pada pH 6-7 dan pH 7-8 sedangkan mineral hidroksiapatit (HAp) akan terbentuk pada pengaturan pH 8-9. Hasil analisis gugus fungsi (FTIR) pada pH7-8 menunjukkan bahwa pita serapan vibrasi gugus OH pada panjang gelombang 3650-3000 cm-1 tidak terjadi sehingga fasa mineral yang terbentuk merupakan β-trikalsiumfosfat sedangkan pada pH 8-9 dan suhu kalsinasi 900ºC menunjukkan adanya spektrum dengan pita serapan yang khas pada bilangan gelombang 555,50 dan 609,51 cm-1serta vibrasi gugus OH pada panjang gelombang 3650-3000 cm-1 yang menandakan terjadinya pembentukan fasa mineral hidroksiapatit (HAp).
Co-Authors Kristanto Wahyudi Muhammad Syaifun Nizar Naili Sofyaningsih Suhanda Suhanda