Densifikasi Komposit Keramik Berbasis Sio2-Mgo Dengan Penambahan B2O3 Pada Temperatur Sinter 1150`C

., Fahad (2014) Densifikasi Komposit Keramik Berbasis Sio2-Mgo Dengan Penambahan B2O3 Pada Temperatur Sinter 1150`C. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Komposit keramik berbasis SiO2-MgO menggunakan pasir Tanah Laut sebagai bahan baku dengan penambahan variasi B2O3 telah berhasil disintesis. Tujuan penambahan B2O3 adalah untuk meningkatkan densitas dan mereduksi porositas. Komposit dibuat dengan cara mencampurkan serbuk pasir Tanah Laut dan MgO dengan penambahan massa B2O3 sebesar 0%, 4,8%,, dan 9,1% (berat) diaduk menggunakan mortar selama 30 menit. Campuran serbuk dicetak dalam bentuk pelet silinder dengan tekanan 4500 N kemudian disinter pada temperatur 1150°C untuk membentuk komposit keramik padat. Identifikasi fasa dilakukan menggunakan X-Ray Diffractometer (XRD). Data XRD dianalisis secara kualitatif menggunakan Match!2 dan secara kuantitatif menggunakan Rietica. Hasil analisis data XRD menunjukkan bahwa pada temperatur sinter 1150°C tanpa B2O3 fasa yang ditemukan adalah kuarsa, forsterit dan enstatit. Sedangkan pada penambahan 4,8% dan 9,1% B2O3 fasa yang ditemukan kuarsa dan protoenstatit. Penyusutan maksimum diameter sekitar 5,4% yaitu pada penambahan 9,1% B2O3. Densitas dan porositas komposit diukur dengan prinsip Archimedes. Nilai porositas komposit tanpa B2O3 sekitar 40% dan densitasnya 1,7 g/cm3 , Sedangkan pada penambahan 4,8% dan 9,1% B2O3 porositasnya bernilai 20% dan 17%, sedangkan densitasnya adalah 1,9 g/cm3 dan 1,9 g/cm3 . Koefisien ekspansi termal (KET) berdasarkan pengujian TMA (Thermo Mechanical Analyzer) sampel-sampel komposit tersebut bernilai,berturut-turut, 12,0; 9,0; dan 9,3 × 10-6 ppm/°C. ========== Ceramic composites based on natural SiO2 sand and MgO synthetic powder with addition of B2O3 have been successfully synthesized. The aim of the addition was to increase density and decrease porosity, but leaving the other properties remain the same. Composites were made by mixing Tanah Laut sand powder and MgO with addition of B2O3 0%; 4,8%; and 9,1% by weight using a mortar for 30 minutes. The mixed powders were compacted in the form of cylindrical pellets at a of pressure 4500N after which were sintered at temperature of 1150°C to form dense ceramic composites. The samples were characterised for their phase composition using X-Ray Diffractometer (XRD). The diffraction data were qualitatively analyzed using Match!2 software and quantitatively using Rietica sofware based on Rietveld method. Sintered sample without B2O3 comprised quartz, forsterite and enstatite while the B2O3-added samples consisted of quartz and protoenstatite. The maximum diametric shrinkage was approximately 5,4% at 9,1% after the addition of B2O3. The density and porosity of the composites were measured by Archimedes principle. The porosity and the density of the composite without B2O3 was approximately 40% and 1,7 g/cm3 . The addition of B2O3 significantly reduced the porosity up to 20 and 17% for the 4,8% and 9,1% B2O3 samples. The coefficient of thermal expansion (CTE) of the composites were ranging from 9,0-12,0 × 10-6 ppm/°C.

Item Type: Thesis (Undergraduate)
Additional Information: RSFi 620.14 Fah d
Uncontrolled Keywords: B2O3, Densitas, Komposit keramik, Porositas, SiO2-MgO, Koefisien ekspansi termal, B2O3, density, ceramic composite, porosity, SiO2-MgO thermal expansion coefficient
Subjects: H Social Sciences > HD Industries. Land use. Labor > HD9590+ Ceramic
H Social Sciences > HD Industries. Land use. Labor > HD9999.C715-.C7154 Composite materials
Divisions: Faculty of Mathematics and Science > Physics > (S1) Undergraduate Theses
Depositing User: - Davi Wah
Date Deposited: 03 Jul 2019 13:58
Last Modified: 03 Jul 2019 13:58
URI: http://repository.its.ac.id/id/eprint/63334

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