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Kristanto Wahyudi
Balai Besar Keramik
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Hidroksiapatit sintetik Balai Besar Keramik (BBK) sebagai material baru filter tabir surya Rizky Berliana Wijayanti; Imas Panca Wardhani; Kristanto Wahyudi
Jurnal Litbang Industri Vol 11, No 1 (2021)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v11i1.6746.33-38

Abstract

Balai Besar Keramik (BBK) telah berhasil mensintesis hidroksiapatit (HA) dari sumber daya alam Indonesia yaitu batu kapur Padalarang dan Cirebon dengan metode presipitasi basah. Berbagai aplikasi yang dapat menggunakan hidroksiapatit sintetik ini antara lain: bone china, kandidat bone grafting, tulang cacat femoralis cavia cobaya, implan tulang berbahan komposit Al-HA dan material karbonat hidroksiapatit. HA merupakan bahan yang non fotokatalitik oleh karena itu tidak akan menimbulkan munculnya radikal bebas. Studi ini meneliti aplikasi dan sifat hidroksiapatit BBK sintetis sebagai bahan filter tabir surya baru. Kristalinitas, ukuran kristal dan mineralogi HA sintetik dikarakterisasi dengan XRD. Kemampuan dalam menyerap radiasi sinar UV dianalisis dengan UV-Vis kemudian nilai faktor SPF dihitung secara in vitro menggunakan persamaan Mansur. Dari hasil analisis UV-Vis menunjukkan bahwa hidroksiapatit sintetis BBK memiliki absorbsi pada panjang gelombang 280-410 nm. Dari perhitungan didapatkan nilai SPF sebesar 8,82.
Karakteristik Kromatik Bone Ash Sintetik Berdasarkan Suhu Kalsinasi Herlina Damayanti; Ayu Ratnasari; 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 (78.266 KB) | DOI: 10.32537/jkgi.v27i2.4409

Abstract

Pada penelitian ini sifat kromatik bone ash sintetik telah dipelajari berdasarkan sistem CIELAB. Bone ash sintetik dikalsinasi dengan variasi suhu 600oC – 1250oC. Masing-masing hasil kalsinasi dijadikan aplikasi glasir ubin pada suhu 1170oC. Panjang gelombang bone ash sintetik kalsinasi 492-574nm dan glasir bone ash 477-542nm, berarti termasuk material putih. Derajat whiteness dan brightness mengalami penurunan dengan nilai terbesar pada bone ash kalsinasi 1250oC, Dwhiteness = -59,90% dan Dbrightness = -61,42%. Berdasarkan nilai L*, a* dan b* ruang warna bone ash sintetik bergeser dari Hijau Kuning menjadi Hijau Biru dan indeks whiteness bergeser menuju hitam. Pergeseran warna terkecil adalah bone ash kalsinasi 1000oC, ΔE  = 13,37 dan terbesar adalah bone ash kalsinasi 1250oC , ΔE  = 37,75. Pergeseran indeks whiteness terkecil adalah bone ash B10, ΔW* = 13,20 dan terbesar adalah bone ash B125  ΔW* = 36,29.  Kata Kunci: CIELAB, bone ash sintetik, kromatik, kalsinasi, whiteness, brightness
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 | Full PDF (713.318 KB) | 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 | 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).
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 | Full PDF (3587.854 KB) | 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.
Sintesis Precipitated Calcium Carbonated Dengan Asam Stearat Sebagai Pengubah Permukaan Citra Fitriani K; Dede Taufik; Kristanto Wahyudi; Hernawan Hernawan
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 | Full PDF (581.733 KB) | DOI: 10.32537/jkgi.v26i2.4123

Abstract

Jumlah permintaan material PCC yang mencapai 108,5 jutan ton pada tahun 2016 dan akan terus meningkat pada tahun-tahun berikutnya. Hampir semua industri membutuhkan material PCC baik sebagai filler maupun material utama seperti kertas, tekstil, karet, cat, ban, bahan adesif, farmasi, kosmetik, sealant, keramik, pasta gigi, makanan, plastik, deterjen, perekam magnetik, sistem transport obat-obatan dan sebagainya. oleh karena itu penelitian ini dilakukan untuk memanfaatkan sumber daya kapur alam Indonesia. Penelitian sintesis PCC ini menggunakan bahan baku dari Padalarang. Proses pembuatan PCC dilakukan dengan metoda karbonasi dan asam stearate sebagai pengubah. Hasil penelitian menunjukkan persen CaCO3 meningkat seiring dengan penambahan asam stearat dengan persen teritinggi 99,387 %. dalam bubur menentukan ukuran butir kapur yang dapat dicapai. Selain itu derajat putih (whiteness) dan derajat kecerahan (brightness) meningkat secara signifikan seiring dengan penambahan asam stearat, nilai yang tertinggi adalah whiteness 84,61 dan brightness 90,93 dengan konsentrasi asam stearat 2,5%.
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.