Studi Pengaruh Suhu Sintering Terhadap Densitas dan Kekerasan Keramik ZrSiO4/Al2O3

Dewi, La Tansa Pramesti (2021) Studi Pengaruh Suhu Sintering Terhadap Densitas dan Kekerasan Keramik ZrSiO4/Al2O3. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Telah dilakukan studi pengaruh suhu sintering terhadap
densitas dan kekerasan keramik ZrSiO4/Al2O3. Penelitian ini
bertujuan untuk mempelajari pengaruh suhu sintering terhadap
pembentukan fasa-fasa, densitas, porositas, dan kekerasan keramik
ZrSiO4/Al2O3. Serbuk zirkon (ZrSiO4) fasa tunggal diektraksi dari
pasir zirkon Kereng Pangi, sedangkan serbuk Alumina (γ-Al2O3)
disediakan dari bahan komersial Merck. Serbuk zirkon dan
alumina dengan perbandingan 2:3 dicampur menggunakan ballmill
selama 3 jam, kemudian dianneal pada suhu 200°C selama 1 jam,
dicetak menjadi pelet dan selanjutnya disinter menggunakan
furnace carbolite konvensional dengan variasi suhu 1200, 1250,
dan 1300 °C dan waktu tahan 3 jam. Fasa yang terbentuk untuk
keramik ZrSiO4/Al2O3 diidentifikasi menggunakan difraksi sinarX (XRD). Densitas dan porositas sampel yang telah disinter diukur
menggunakan densimeter, sedangkan kekerasan diuji
menggunakan Micro Hardness Vickers. Hasil identifikasi fasa
keramik ZrSiO4/Al2O3 yang telah disinter menunjukkan bahwa
terdapat fasa zirkon (ZrSiO4), korundum (α-Al2O3), zirkonia
tetragonal (t-ZrO2), zirkonia monoklinik (m-ZrO2), dan mullite
(3Al2O3.2SiO2). Suhu sintering mengakibatkan dekomposisi
zirkon menjadi zirkonia dan silika, transformasi fasa γ-Al2O3 ke αAl2O3, ZrSiO4 ke t-ZrO2 dan m-ZrO2 dan pembentukan fasa baru
mullite (3Al2O3.2SiO2). Nilai densitas dan kekerasan cenderung
mengalami kenaikan seiring dengan bertambahnya suhu sintering
pada 1200, 1250, dan 1300oC secara berurutan sebesar 3,30; 3,45;
viii
dan 3,80 g/cm3 dan 0,90; 1,39; dan 2,38 GPa, sementara porositas
cenderung menurun secara berurutan 22,66; 18,90; dan 10,03 %.

======================================================
Studies have been conducted on the effect of sintering
temperature on the density and hardness of the ZrSiO4/Al2O3
ceramics. This research aims to study the effect of the sintering
temperature on the formation of phases, density, porosity, and
hardness of ZrSiO4/Al2O3 ceramics. Single phase zircon powder
(ZrSiO4) was extracted from Kereng Pangi zircon sand, while
Alumina powder (γ-Al2O3) was supplied from merck commercial
material. Zircon powder and alumina with a ratio of 2:3 were
mixed using a ball mill for 3 hours, then annealed at 200 °C for 1
hour, molded into pellets and then sintered using a conventional
carbolite furnace with temperature variations of 1200, 1250, and
1300 °C and time hold 3 hours. The phases formed for
ZrSiO4/Al2O3 ceramics were identified using X-ray diffraction
(XRD). The density and porosity of the sintered samples were
measured using a densimeter, while the hardness was tested using
Micro Hardness Vickers. The results of the identification of the
sintered ZrSiO4/Al2O3 ceramic phase showed that there were
phases of zircon (ZrSiO4), corundum (α-Al2O3), tetragonal zirconia
(t-ZrO2), monoclinic zirconia (m-ZrO2), and mullite (3 Al2O3.2
SiO2). The sintering temperatures caused the decomposition of
zircon into zirconia and silica, phase transformation of γ-Al2O3 to
α-Al2O3, ZrSiO4 to t-ZrO2 and m-ZrO2 and the formation of a new
phase of mullite (3 Al2O3.2 SiO2). Density and hardness values tend
to increase with increasing sintering temperature at 1200, 1250,
and 1300oC namely 3,30; 3,45; 3,80 g/cm3
and 0,90; 1,39; 2,38
x
GPa. respectively, while porosity tends to decrease 22,66; 18,90;
and 10,03 % respectively.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Alumina (Al2O3), Densitas, Kekerasan, Suhu sintering, Zirkon (ZrSiO4) ======== Alumina (Al2O3), Density, Hardness, Temperature sintering, Zircon (ZrSiO)
Subjects: Q Science > QC Physics
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Physics
Depositing User: La Tansa Pramesti Dewi
Date Deposited: 12 Aug 2021 13:54
Last Modified: 12 Aug 2021 13:54
URI: http://repository.its.ac.id/id/eprint/85894

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