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Kristanto Wahyudi
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Determination of Oxide Metal Content in Bentonite using Energy Dispersive X-Ray Spectroscopy (EDX) with Three Types of Sample Preparation Synta Mutiara B.W.; Nurhidayati Nurhidayati; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 28, No 2 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v28i2.5792

Abstract

Bentonit merupakan salah satu jenis lempung yang banyak terdapat di Indonesia dan memiliki komposisi kimia yang sangat bervariasi. Salah satu cara untuk mengetahui kadar logam oksida pada bentonit seperti SiO2, Al2O3, CaO, Fe2O3, K2O dan TiO2 secara kualitatif dan kuantitatif adalah dengan menggunakan energy dispersive x-ray spectroscopy (EDX). Sampel bentonit dipreparasi dengan cara serbuk, press dan vakum. Analisis statistik MANOVA dilakukan untuk mengetahui pengaruh jenis preparasi sampel uji terhadap kadar SiO2, Al2O3, CaO, Fe2O3, K2O dan TiO2. Uji normalitas dengan Saphiro-Wilk dan Q-Q Plot menunjukkan bahwa data terdistribusi normal multivariat. Secara keseluruhan, terdapat pengaruh dari jenis preparasi sampel bentonit terhadap kadar SiO2, Al2O3, CaO, Fe2O3, K2O dan TiO2.  
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
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

Abstract

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.
Synthesis and Characterization of Cetyl Piridinium Chloride Modified and Al2O3 Pillared Clay ferry arifiadi; Irna Rosmayanti; Herlina Damayanti; Hernawan Hernawan; 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.v29i2.6673

Abstract

Bentonite is a mineral that is very abundant in Indonesia and has the potential to be developed, one of which is by adding intercalant to obtain a modified bentonite with the desired characteristics. In this study, the synthesis was carried out by the intercalation method by surfactant Cetyl pyridinium Chloride (CPC) with % weight variations and then followed by pillarization with aluminum polyoxo. Then the resulting solid phase is calcined at a temperature of 450oC. The results obtained were that bentonite with modified CPC and aluminum polyoxo had higher basal distance and surface area characteristics compared to natural bentonite and this increase was also proportional to the amount of CPC added before the pillarization process. The best modification value in the addition of CPC was 36% by weight with a basal distance of 16,8898 Å and a surface area of 276.478 m2 / g. From this research, it can be concluded that the addition of CPC and aluminum polyoxo to bentonite can increase the basal distance and its surface area. The added CPC concentration also has an effect on increasing the number of pillar cations that enter the bentonite so that the pillarization that occurs in bentonite is more and causes the characteristics of the bentonite to be better.
Fabrication of Ceramic Alumina Tube by Extrusion Method Suzanne Agustin; Kristanto Wahyudi; Rizky Berliana Wijayanti; Maulid Purnawan
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.v28i1.5618

Abstract

Ceramic tubes are widely used as process equipment in various industries. One of the materials used as raw material for ceramic tubes is alumina. Materials are processed by vacuum extruder to obtain products with constant cross section. The characteristics of the products depend on the amount and chemical composition of the crystals formed. The formation of mullite as the main mineral will increase thermal shock resistance because mullite has a low expansion coefficient. Composition B with the percentage of 50% alumina, 30% kaolin, 10% clay and 10% MgO provide the best temperature shock resistance. The measurement result for flexural strength of composition B is 2400.52 kg / cm2
Cullet In The Circular Economy Of The Glass Industry Maulid Purnawan, S.Si.; Ria Julyana Manullang; 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.v29i2.6701

Abstract

Glass waste (cullet) in Indonesia has economic value which is currently not yet properly processed. Cullet processing could be a solution to imported cullets substitution as raw materials for the glass industry and also a solution to environmental problems. One method of processing cullets is through the circular economy. Circular economy is a model that aims to use resources effectively and efficiently by eliminating the emergence of waste and extending the functions and benefits of a resource in a production process. In this paper, a circular economy model for the glass industry has been developed which focuses on the management of cullets through the process of reduce, reuse, recycle and regenerative into cullets as glass raw materials. Several ways to help the application of a circular economy of glass waste in Indonesia are the availability of indutries that collecting, sorting and processing glass waste and also the changes of society culture in waste disposal so that glass waste does not mix with other waste and easy to recycle. Government support as policy makers can also encourage the transition process towards a circular economy.
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).
Sintesis dan Karakterisasi Bone Ash Sintetik dari Bahan Alam Kristanto Wahyudi; Frank Edwin; Naili Sofyaningsih
Jurnal Keramik dan Gelas Indonesia Vol 25, No 2 (2016): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v25i2.2664

Abstract

Sintesa bahan bone ash sintetis yang dihasilan menggunakan metode presipitasi telah berhasil dilakukan. Bahan baku alam yang digunakan untuk sintesa bone ash adalah kapur Padalarang dan kapur Cirebon. Parameter proses sintesis bone ash yang dikontrol adalah pH dari larutan yakni pH 8-9 dan pH 10-11, sedangkan variabel yang dibandingkan adalah suhu perlakuan panas pada rentang suhu 800–1000°C. Perlakuan panas dilakukan untuk mempelajari efek perubahan temperatur terhadap ukuran partikel serta kristalinitas bone ash hasil sintesa. Karakterisasi bone ash sintetis dilakukan dengan EDX, XRD, dan FTIR
Technoeconomic Study of Belitung Kaolin as Import Substitution Material in Fiber Cement Board Production nurhidayati nurhidayati; kristanto wahyudi; faiza elisa hasfianti
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.v29i2.6714

Abstract

Cement board that commonly used as raw material for cheap housing component is calcium silicate cement board (fiber cement boards). However, the clay used as raw material for cement boards is still imported. In 2019, imported clay used for construction industry in Indonesia amounted to 57,000 tonnes per year with a transaction value of more than US $ 38 million. On the other hand, Indonesia, especially the province of Bangka Belitung, has a value of kaolin resources of 376,687,532 tons. Baristand Banjarbaru has successfully applied Belitung kaolin as a substitute for imported clay in cement board production. The physical properties of cement board made of kaolin Belitung were not significantly different from cement board made of imported clay.Therefore, Belitung kaolin has the potential to become a substitute for imported clay in cement board production and can be increased in terms of production scale so a techno-economic study is needed. Technoeconomic study had analyzed with the assumptions for a cement board production capacity of 100 tons / day, an investment age of 5 years, an initial investment of 0 for imported clay as raw material and 13,167,000,000 for kaolin as raw material or equivalent to 30% of sales. With the selling price of cement board Rp.55,000 / kg, the NPV of Belitung kaolin is 86,071,631,216.30 and the NPV of imported clay is 77,604,584,262.66. These results indicate that the cement board production business using Belitung kaolin as raw material is feasible to develop.
Co-Authors Abdul Rachman Ayu Ratnasari Citra Fitriani K Dede Taufik faiza elisa hasfianti Ferry arifiadi ferry arifiadi Frank Edwin Hasna Rofifah Novianti Herlina Damayanti Hernawan Hernawan Imas Panca Wardhani Irna Rosmayanti Maulid Purnawan Maulid Purnawan, S.Si. Muhammad Syaifun Nizar Naili Sofyaningsih Nurhidayati Nurhidayati nurhidayati nurhidayati Nurhidayati Nurhidayati Ria Julyana Manullang Ria Julyana Manullang Rizky Berliana Wijayanti Rizky Berliana Wijayanti Suzanne Agustin Synta Mutiara B.W.