Studi Pengaruh Waktu Tahan Sintering Terhadap Densitas dan Kekerasan Keramik ZrSiO4/Al2O3

Isnaini, Mustaqimah (2021) Studi Pengaruh Waktu Tahan Sintering Terhadap Densitas dan Kekerasan Keramik ZrSiO4/Al2O3. Undergraduate thesis, Institut Tekonologi Sepuluh Nopember.

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Abstract

Telah dilakukan penelitian pengaruh waktu tahan sintering terhadap densitas dan kekerasan Kermaik zirkon-alumina (ZrSiO4/Al2O3). Serbuk zircon (ZrSiO4) kemurnian tinggi diekstraksi dari pasir Zirkon Puya Kalimantan Tengah dengan metode Alkali Fusion, sedangkan alumina (γ-Al2O3) disiapkan dari bahan komersial Merck. Kedua bahan dasar dengan perbandingan mol 2 : 3 dicampur menggunakan ballmill selama 6 jam, dikalsinasi 200 oC selama 2 jam kemudian dikompaksi membentuk pellet, selanjutnya disinter pada 1300 oC dengan variasi waktu tahan 3, 5 dan 7 jam. Keramik ZrSiO4/Al2O3 yang telah disinter diidentifikasi menggunakan difraksi Sinar -X (XRD), densitas diukur menggunakan densimeter, sedangkan kekerasan diuji dengan Micro hardness Vickers. Hasil identifikasi pola XRD menunjukkan bahwa terbentuk 5 fasa pada masing masing sampel yaitu zirkon (ZrSiO4), zirkonia (t-ZrO2 dan m-ZrO2), korondum (α-Al2O3), dan mullite (3Al2O3. 2SiO2). Nilai densitas dan kekerasan cenderung meningkat dengan lama waktu tahan. Nilai tertinggi densitas 4,067 g/cm3 dan kekerasan 3,09 GPa. terdapat pada sampel dengan waktu tahan sintering 7 jam. Temperatur sintering menyebabkan transformasi dan pembentukan fasa baru serta dekomposisi ZrSiO4, sedangkan lama waktu tahan sintering akan meningkatkan nilai kekerasannya.
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Research of the effect of sintering holding time on the density and hardness of zircon-alumina (ZrSiO4/Al2O3) ceramics has been carried out. High purity zircon powder (ZrSiO4) was extracted from the Puya Zircon sand of Central Kalimantan by the Alkali Fusion method, while alumina (γ-Al2O3) was prepared from Merck commercial materials. The two basic materials with a mole ratio of 2 : 3 were mixed using a ball mill for 6 hours, calcined at 200 oC for 2 hours then compacted to form pellets, and then sintered at 1300 oC with variations in holding time of 3, 5 and 7 hours. The sintered ZrSiO4/Al2O3 ceramics were identified using X-Ray diffraction (XRD), density was measured using a densimeter, while hardness was tested using Micro hardness Vickers. The results of the identification of the XRD pattern showed that 5 phases were identified in each sample, namely zircon (ZrSiO4), zirconia (t-ZrO2 and m-ZrO2), corondum (α-Al2O3), and mullite (3Al2O3. 2 SiO2). Density and hardness values tend to increase with increasing holding time. The highest value of density is 4,067 g/cm3 and hardness is 3.09 GPa. found in ZrSiO4/Al2O3 ceramics with a holding time of 7 hours. The sintering temperature causes transformation, new phase formation and decomposition of ZrSiO4, while the longer holding time increase the hardness value.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Densitas, kekerasan, sintering, waktu tahan, density, hardness, holding time, sintering
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Mustaqimah Isnaini
Date Deposited:	12 Aug 2021 16:37
Last Modified:	12 Aug 2021 16:37
URI:	http://repository.its.ac.id/id/eprint/86024

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