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Subari Subari

Center for Ceramic, Ministry of Industry

Author-ID : 3950464

Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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CHARACTERIZATION OF KARANGNUNGGAL KAOLIN AS RAW MATERIALS FOR CERAMIC Widodo Widodo; Subari Subari; Bagus D. Erlangga
Indonesian Mining Journal Vol 19, No 2 (2016): INDONESIAN MINING JOURNAL VOL. 19 NO. 2 June 2016
Publisher : Puslitbang tekMIRA

Kaolin from Karangnunggal had been characterized. This kaolin has a brownish white in color and is associated with tuff. To identify characteristics, the samples was analyzed by XRD, optical microscope, AAS, and SEM. The results showed that the kaolin consisted of kaolinite, halloysite, cristobalite, dickite, muscovite, illit and hematit while petrographic analysis describes halloysite, kaolinite, dickite, and quartz. SEM analysis showed the crystal forms such as kaolinite, halloysite and dickite; while chemical analysis confirmed that kaolin composition comprised SiO2 = 65.78 %, Al2O3 = 19.55 %, Fe2O3 = 0.90 % and LOI = 8.29 %. Based on characterization results Karangnunggal kaolin originated from tuff alteration. Referring to such properties, this kaolin can be used as raw material for white ceramic products such as sanitary, ceramic tiles and insulation.

IMPROVING TAPIN KAOLIN QUALITY FOR WHITE WARE CERAMIC Subari Subari; Tatang Wahyudi
Indonesian Mining Journal Vol 17, No 2 (2014): INDONESIAN MINING JOURNAL Vol. 17 No. 2 JUNE 2014
Publisher : Puslitbang tekMIRA

Tapin kaolin cannot directly be utilized as raw material for white ware ceramics due to its high Fe2O3 content. It needs upgrading its quality in terms of fulfilling the specification of white ware ceramics. Such the material requires a series of process including washing, wet sieving in magnetic ferro-filter equipment and then dissolv- ing by H2SO4 10%. Based on several parameters such as Al2O3, SiO2 and Fe2O3 contents, 2-µm particle size density, whiteness and plasticity; Tapin kaolin quality develops significantly. XRD analysis shows that the mate- rial does not have maghemite anymore. Quartz is relatively low and mafic minerals are unavailable. Referring to such quality, Tapin kaolin can be used for Parian porcelain.

Co-Authors Bagus D. Erlangga Tatang Wahyudi Widodo Widodo

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Journal : Indonesian Mining Journal