Karakterisasi Dan Studi Sebaran Kobalit Sistem Badan Keramik Lempung Bojonegoro-Feldspar-Kuarsa

Sulistya, Rohmat (2006) Karakterisasi Dan Studi Sebaran Kobalit Sistem Badan Keramik Lempung Bojonegoro-Feldspar-Kuarsa. Masters thesis, Institut Teknologi Sepuluh November.

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Abstract

Telah dilakukan penelitian tentang perbaikan karakter lempung Bojonegoro dan studi sebaran kobalt pada badan keramik tersebut. Optimasi komposisi badan keramik yang tersusun dari Lempung Bojonegoro, feldspar, dan kuarsa dilakukan dengan metode triaxial blend. Dari 15 komposisi badan keramik yang dibuat, 6 komposisi layak dicetak dalam kondisi plastis. Analisis DTA/TG menunjukkan suhu sintering tercapai pada 960°C. Angka susut total berkisar 4,8-8,8% pada suhu 1000°C dan meningkat menjadi 6,5-10,7% pada suhu 1100°C. Kekuatan badan keramik yang dinyatakan dengan modulus patah berkisar 4,43-8,79 N/mm² pada suhu 900°C, meningkat dua kali menjadi 8,21-16,91 N/mm² pada suhu 1000°C dan menjadi 13,2->20 N/mm² pada suhu 1050°C. Diperoleh komposisi badan keramik optimum yaitu 57% lempung; 14,5% feldspar; 28,5% kuarsa dengan nilai susut 7% dan modulus patah 18,23 N/mm². Pada suhu optimum pembakaran glasir (1050°C), sebanyak 93,7% kobalt tersebar homogen pada permukaan badan keramik optimum, sedangkan 6,3% sisanya terdifusi ke dalam badan keramik pada kedalaman di bawah 0,7 mm dari permukaan.
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The quality improvement of Bojonegoro Clay and the cobalt distribution on the surface of ceramic body system have been studied. The ceramic body system consists of Bojonegoro Clay, feldspar and quartz is optimized using a triaxial blend method. About 6 compositions among 15 compositions of synthesized ceramic bodies can be casted in plastic condition. DTA/TG analysis shows that the sintering temperature is reached at 960°C. The total shrinkage values are between 4.8-8.8% at 1000°C and increase to 6.5-10.7% at 1100°C. The modulus of rupture values are between 4.43-8.79 N/mm² at 900°C; increase to 8.21-16.91 N/mm² at 1000°C and 13.2->20 N/mm² at 1050°C. It has been obtained that the optimum composition of the ceramic body is 57% clay, 14.5% feldspar, 28.5% quartz with the total shrinkage is 7% and the modulus of rupture is 18.23 N/mm². The 93.7% of cobalt is distributed homogeneously on the optimum ceramic surface; while 6.3% of cobalt diffuses into ceramic body under 0.7 mm depth at optimum glaze firing temperature (1050°C).

Item Type:	Thesis (Masters)
Additional Information:	RTKi 620.14 Sul k
Uncontrolled Keywords:	Lempung Bojonegoro, feldspar, kuarsa, badan keramik, sebaran kobalt, Bojonegoro Clay, feldspar, quartz, ceramic body, cobalt distribution
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD9590+ Ceramic
Divisions:	Faculty of Mathematics and Science > Chemistry > 47101-(S2) Master Thesis
Depositing User:	magang .
Date Deposited:	02 Oct 2026 06:40
Last Modified:	02 Oct 2026 06:40
URI:	http://repository.its.ac.id/id/eprint/145190

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