Double steps leaching and filtration in caustic fusion method to produce zirconia from local zircon concentrate

Rahmawati, Fitria; Permadani, Ita; Soepriyanto, Syoni; Syarif, Dani Gustaman; Heraldy, Eddy

doi:10.2991/icopia-14.2015.18

Cited by 7 publications

(5 citation statements)

References 6 publications

(2 reference statements)

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“…Besides, these impurities were also recorded in previous studies by using Indonesian and Australian zircon sand [21,22]. Research by Rahmawati et al, [20] with Indonesian zircon sand managed to obtained a slightly lower silicon dioxide at 3.60 wt.% for zirconia calcined at 800 °C in a somewhat more prolonged duration of 5 hours.…”

Section: Elemental Analysissupporting

confidence: 55%

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Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Nur Fatinhanani Fatimah Norsham,

Istikamah Subuki

2024

ARFMTS

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Polymorphic zirconia is economically attractive in various applications due to its low reactivity, high strength, and stability. Zirconia can be synthesized from locally available Amang zircon sand as an inexpensive green alternative as it has a high zirconium content as reported by previous report. Unfortunately, the study was only focused on the formation of zirconium oxychloride despite of high zirconium content from the improved alkali fusion method proposed. Therefore, a further study on zirconia powder calcined in varied temperatures from Amang zirconium oxychloride precursor was done. Amang zirconia powder was then characterized in order to study the effect of temperature on Amang zirconia powder. Elemental analysis showed that zirconium composition was affected by temperature and increased as the temperature increased with the highest zirconium content of 81.28 wt.% with low impurities after calcined at 800 °C for 4 hours. The phase analysis satisfied monoclinic zirconia with minor tetragonal and cubic phase with sharper peaks as calcined temperature increased. Increased tetragonal and cubic phase was observed as the temperature was increased. Morphology analysis showed zirconia powder was angular and pyramidal with large crystal size which led to high tendency of monoclinic phase. Calcination temperature of 800 °C was determined to be the most suitable temperature to calcine high purity zirconia powder using Amang zirconium oxychloride precursor.

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Section: Elemental Analysissupporting

confidence: 55%

“…On the other hand, the highest zirconium oxide obtained in this research was higher than in the previous study using Indonesia zircon sand. The study recorded a lower zirconium oxide at 72.07 wt.% [20].…”

Section: Elemental Analysismentioning

confidence: 89%

Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Nur Fatinhanani Fatimah Norsham,

Istikamah Subuki

2024

ARFMTS

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“…After decantation and heating at 800 o C for 5 hours, a white powder of ZrO2 was founded. Our previous research on the caustic fusion of this Bangka Island zircon sand produced a zirconia powder at 71.53 ± 0.76% of purity (Rahmawati et al, 2014).…”

Section: Experimental Methodsmentioning

confidence: 92%

Electrical Properties of Various Composition of Yttrium Doped-Zirconia Prepared from Local Zircon Sand

Rahmawati¹,

Permadani²,

Syarif³

et al. 2017

IJTech

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Doping yttrium ions, Y 3+ into ZrO2 produced Yttria-Stabilized Zirconia, YSZ. Various amount of yttrium ions could provide different ionic conductivity. This research investigated electrical conductivity of various YSZ composition, i.e., 4.5; 8.0 and 10% mol yttrium in ZrO2. The ZrO2 powder used was synthesized from zircon sand, a side product of tin mining plant, Bangka Island, Indonesia. Structural investigation on the prepared YSZ found that yttrium ion doping has changed the crystal structure of ZrO2 from monoclinic to cubic, even though the monoclinic and tetragonal are also still exist. The Y 3+ doping changed the cell parameter of ZrO2 crystal. It indicates that the Y 3+ entered into the ZrO2 structure and produced vacancy sites. The highest ionic conductivity is provided by 8% mol Yttrium doping or 8YSZ, i.e., 2.74×10 -4 S.cm -1 at 700 o C with an activation energy of 0.741 eV.

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“…The use of zircon in the production of zirconia is quickly increasing because it is capable of resisting high temperatures and chemical attacks, creating good refractory for furnaces, steel ladles, and foundry sand used [10]. The production of zirconia is simple, and it requires low capital and operational cost by concentrating the zircon through caustic fusion [11][12]. These facts show that the caustic method is essential for compound production.…”

Section: ■ Introductionmentioning

confidence: 99%

Study of the Synthesis of Zirconia Powder from Zircon Sand obtained from Zircon Minerals Malaysia by Caustic Fusion Method

et al. 2020

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The zircon powder from Zircon Minerals Malaysia is a pure premium grade zircon sand milled 1.5 µm that contain ZrSiO4, ZrO2, HfO2, SiO2, Al2O3, TiO2, and Fe2O3. The monoclinic zirconia powders were synthesized from the zircon sand of Zircon Minerals Malaysia, by caustic fusion method at calcination temperatures between 500 °C to 800 °C. The as-synthesized zirconia was characterized through X-Ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric and differential thermal analysis (TG-DTA), and X-Ray fluorescence (XRF) techniques. The XRD results show two monoclinic phases of microcrystalline zirconia. Zirconia that was calcined at 600 °C obtained the highest value of ZrO2, which was 54.48%; followed by zirconia calcined at 700 °C, 800 °C, and 500 °C, which obtained the ZrO2 values of 53.58%, 52.41%, and 51.53%, respectively, based on the XRF analysis. As-synthesized zirconia showed monoclinic phases where the surface areas were 0.0635 m2/g, 0.135 m2/g, 0.0268 m2/g, and 0.0288 m2/g, for zirconia calcined at temperatures of 500 °C, 600 °C, 700 °C, and 800 °C, respectively. The surface structure of the powder that had been calcined at 600 C showed similarities with the commercial zirconia. The similarities of the synthesized zirconia and commercial zirconia showed that the zirconia powder could be synthesized using zircon sand by caustic fusion method, even though the content of zirconia was lower compared to that of the commercial zirconia powder.

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Double steps leaching and filtration in caustic fusion method to produce zirconia from local zircon concentrate

Cited by 7 publications

References 6 publications

Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Electrical Properties of Various Composition of Yttrium Doped-Zirconia Prepared from Local Zircon Sand

Study of the Synthesis of Zirconia Powder from Zircon Sand obtained from Zircon Minerals Malaysia by Caustic Fusion Method

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