., 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 > 45201-(S1) Undergraduate Thesis |
| 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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