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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
Karakteristik Kupel Berbasis Magnesia Dan Abu Tulang Sintesis Rustini Rustini; Dede Taufik; Maulid Purnawan; Ria Julyana Manullang; Ig. Adi Widjanarko
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 (641.136 KB) | DOI: 10.32537/jkgi.v27i2.4413

Abstract

Proses kupelasi banyak digunakan untuk penentuan logam mulia konsentrasi rendah dalam material geologi. Proses ini membutuhkan kupel sebagai wadah pemisahan logam mulia dari oksida timbal (PbO). Dalam penelitian ini telah dilakukan pembuatan dan karakteristik kupel berbasis magnesia dan abu tulang dengan cara press. Kupel diuji porositas, ketahanan kejut suhu dan kemampuan penyerapan  PbO. Hasil penelitian menunjukkan bahwa kupel dengan komposisi campuran abu tulang dan Dead Burnt Magnesite (DBM) sebesar 15 : 80 dan 35 : 60 merupakan komposisi terbaik untuk menghasilkan kupel dengan porositas diatas 30%, tahan kejut suhu sebanyak 5 siklus dan mampu menyerap timbal monoksida dengan atasan Au yang tersisa berada dalam rentang penerimaan Laboratorium PT Antam.
Ceramic Cutting Tools: Development, Characteristics and Prospects Maulid Purnawan
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 | Full PDF (503.267 KB) | DOI: 10.32537/jkgi.v27i1.4004

Abstract

Cutting tools in the machinery industry that work at high speeds around 100000-150000 rpm with feed rates above 100 m / min require special specifications namely hardness> 14.5 GPa, toughness> 4 MPa.m1 / 2 for turning inserts,> 8 MPa. m1 / 2 for drill, and> 15 MPa.m1 / 2 for tap and good wear resistance at high working temperatures.The specifications are filled with ceramic material which has a high melting point, high hardness, good chemical stability, high oxidation and corrosion resistance.In general, ceramic cutting tools are grouped into three types, namely alumina-based cutting tools, silicon nitride and cutting tools which are coated with ceramic material with a thickness of 4-15 μm.Commercially, ceramic cutting tools have been applied to the machinery industry in Indonesia, but their needs are still imported because there are no domestic ceramic cutting tools manufacturers. Therefore, the development of the ceramic cutting tool industry in Indonesia has good prospects.Development of the latest ceramic cutting tool products are cutting tools coated with AlTiN which have better thermal resistance and wear time compared to carbide compounds, cermet-based cutting tools capable of working at cutting speeds of 300-500 m / min and whisker reinforced ceramic cutting tools which fabricated in situ or carbon substitution.
Pembuatan dan Karakterisasi Material Cutting Tools Alumina Aditif Titania Maulid Purnawan; Soewanto Rahardjo; M. Sobron Lubis
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 (792.5 KB) | DOI: 10.32537/jkgi.v26i2.4124

Abstract

Pembuatan material cutting tools dari alumina aditif titania telah dilakukan. Aditif TiO2 dan TiC pada alumina berfungsi meningkatkan kekuatan mekanik. Komposisi material cutting tools keramik dibentuk dengan cara press dan dibakar pada 2 variasi suhu pembakaran yaitu 1600°C dan 1700°C. Pembakaran dilakukan dengan metode substitusi karbon yang bersumber dari sagar silikon karbida yang bertujuan mengubah TiO2 menjadi TiC. Berdasarkan hasil karakterisasi yang dilakukan,  bahan dengan  komposisi 97% Al2O3, 3% TiO2 yang dibakar pada suhu 1700°C mempunyai sifat yang lebih baik untuk dijadikan sebagai bahan cutting tools dengan kekerasan (vickers hardness)  25,21GPa.
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
Karakteristik Kupel Berbasis Magnesia Dan Abu Tulang Sintesis Rustini Rustini; Dede Taufik; Maulid Purnawan; Ria Julyana Manullang; Ig. Adi Widjanarko
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.v27i2.4413

Abstract

Proses kupelasi banyak digunakan untuk penentuan logam mulia konsentrasi rendah dalam material geologi. Proses ini membutuhkan kupel sebagai wadah pemisahan logam mulia dari oksida timbal (PbO). Dalam penelitian ini telah dilakukan pembuatan dan karakteristik kupel berbasis magnesia dan abu tulang dengan cara press. Kupel diuji porositas, ketahanan kejut suhu dan kemampuan penyerapan  PbO. Hasil penelitian menunjukkan bahwa kupel dengan komposisi campuran abu tulang dan Dead Burnt Magnesite (DBM) sebesar 15 : 80 dan 35 : 60 merupakan komposisi terbaik untuk menghasilkan kupel dengan porositas diatas 30%, tahan kejut suhu sebanyak 5 siklus dan mampu menyerap timbal monoksida dengan atasan Au yang tersisa berada dalam rentang penerimaan Laboratorium PT Antam.
Ceramic Cutting Tools: Development, Characteristics and Prospects Maulid Purnawan
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.v27i1.4004

Abstract

Cutting tools in the machinery industry that work at high speeds around 100000-150000 rpm with feed rates above 100 m / min require special specifications namely hardness> 14.5 GPa, toughness> 4 MPa.m1 / 2 for turning inserts,> 8 MPa. m1 / 2 for drill, and> 15 MPa.m1 / 2 for tap and good wear resistance at high working temperatures.The specifications are filled with ceramic material which has a high melting point, high hardness, good chemical stability, high oxidation and corrosion resistance.In general, ceramic cutting tools are grouped into three types, namely alumina-based cutting tools, silicon nitride and cutting tools which are coated with ceramic material with a thickness of 4-15 μm.Commercially, ceramic cutting tools have been applied to the machinery industry in Indonesia, but their needs are still imported because there are no domestic ceramic cutting tools manufacturers. Therefore, the development of the ceramic cutting tool industry in Indonesia has good prospects.Development of the latest ceramic cutting tool products are cutting tools coated with AlTiN which have better thermal resistance and wear time compared to carbide compounds, cermet-based cutting tools capable of working at cutting speeds of 300-500 m / min and whisker reinforced ceramic cutting tools which fabricated in situ or carbon substitution.
Pembuatan dan Karakterisasi Material Cutting Tools Alumina Aditif Titania Maulid Purnawan; Soewanto Rahardjo; M. Sobron Lubis
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.v26i2.4124

Abstract

Pembuatan material cutting tools dari alumina aditif titania telah dilakukan. Aditif TiO2 dan TiC pada alumina berfungsi meningkatkan kekuatan mekanik. Komposisi material cutting tools keramik dibentuk dengan cara press dan dibakar pada 2 variasi suhu pembakaran yaitu 1600°C dan 1700°C. Pembakaran dilakukan dengan metode substitusi karbon yang bersumber dari sagar silikon karbida yang bertujuan mengubah TiO2 menjadi TiC. Berdasarkan hasil karakterisasi yang dilakukan,  bahan dengan  komposisi 97% Al2O3, 3% TiO2 yang dibakar pada suhu 1700°C mempunyai sifat yang lebih baik untuk dijadikan sebagai bahan cutting tools dengan kekerasan (vickers hardness)  25,21GPa.
Co-Authors Dede Taufik Ig. Adi Widjanarko Kristanto Wahyudi M. Sobron Lubis Ria Julyana Manullang Rizky Berliana Wijayanti Rustini Rustini Soewanto Rahardjo Suzanne Agustin