New extraction technique of zirconium and hafnium from zircon mineral

El_Kareem, Ahmed Abd

doi:10.21608/ajnsa.2019.3052.1066

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…These spectra confirm the presence of several elements in the sample, which is in agreement with the previous reports on natural zircon samples. [ 42 ] The main elements identified include Zr, Hf, Ca, Fe, and Ce, while small amounts of Ti, Mn, Sr, Y, Th, and U. It was found that alongside the primary element zirconium (Zr) with a concentration of around 48%, ten other elements were detected in this particular sample.…”

Section: Resultsmentioning

confidence: 96%

Local Structure, Structural, Vibrational, and Optical Properties of Natural Zircon

Kumar,

Tripathi,

Sengupta

et al. 2024

Physica Status Solidi (b)

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Structural properties of Indian metamict single zircon crystals are studied by comparing their properties with those of synthetic zircon synthesized via solid‐state reaction method, which serves as the standard. X‐Ray diffraction (XRD) data reveal changes in lattice parameters and the presence of strain, metamictization, etc. It is found that the degree of crystallinity is ≈63.8% indicating the simultaneous presence of crystalline and disordered regions. These changes are likely due to the presence of several radioactive/nonradioactive elements. The presence of such elements is observed and the sample composition is analyzed through total reflection X‐Ray fluorescence. XRD crystallographic data are further utilized as input for analyzing X‐Ray absorption spectroscopy data recorded around Zr central absorbing atom. X‐Ray absorption near‐edge structure shows slight modification in the white line feature and some disorder compared to the synthetic one. Reduced coordination number observed from extended X‐Ray absorption fine structure suggests the presence of disorder in local structure. Micro‐Raman spectroscopy indicates that crystalline behavior varies across different locations, suggesting that the sample has undergone varying degrees of metamictization, confirming a nonuniform distribution of elements. The work documents and analyses structural evolution within isolated silica tetrahedron network in association of Zr4+ cation as a function of self‐irradiation and recovery over millions of years and correlating the same with optical properties.

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Section: Resultsmentioning

confidence: 96%

Local Structure, Structural, Vibrational, and Optical Properties of Natural Zircon

Kumar,

Tripathi,

Sengupta

et al. 2024

Physica Status Solidi (b)

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“…NaOH/ZrSiO4 as accordance to Equation ( 2) and (3) (Abdel-Rehim, 2005;Abdelkader, Daher & El-Kashef, 2008). The sodium silicate was leached out by the water due to its watersoluble property (Abdelkareem, 2019). This process is crucial as the hydrolysis of Na2ZrO3 can be hindered and subsequently decreasing the zirconium formation.…”

Section: It Is Clearly Shown That the Zirconium Composition Ofmentioning

confidence: 93%

Influence on Ratio of NaOH/ZrSiO4 in Alkali Fusion for Amang Zircon Sand

Subuki¹

2022

ASMScJ

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Amang Zircon Sand from Amang Onn Sdn. Bhd. mineral company has a high composition of zirconium at 61.63 wt% and low silicon composition at 4.90 wt%. The high composition of zirconium in Amang zircon sand indicates the possibility to synthesise it into a zirconia. Zirconium was synthesised using alkali fusion method with different ratio of NaOH/ZrSiO4 to determine the optimum ratio based on the zirconium yield. Alkali fusion method is coupled with thermal treatment as it will produce a higher yield of zirconium with lower impurities. Then it will be leached with deionised water and hydrochloric acid (HCl). The synthesised zirconium was characterised through X-Ray fluorescence (XRF) spectroscopy, X-Ray diffraction (XRD) and particle size distribution (PSD) analysis. The XRF analysis after the fusion and thermal treatment shows a high composition of zirconium as well as great reduction of silicon. 1.2NaOH/ZrSiO4 is determined to be the optimum ratio as it has the lowest silicon impurity of 2.11 wt% and high yield of zirconium at 71.40 wt%. The low impurities will reduce the chance of cracking and maximising the efficiency of zirconia. It is supported by XRD patterns that are dominated by high zirconium peaks. The zirconium oxychloride obtained after acid leaching has a high zirconium composition. This shows that it is possible to use Amang zircon sand as a precursor to synthesis a zirconia using alkali fusion method with sodium hydroxide.

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“…It is a heavy mineral with excellent properties like; high hardness, high melting point, high chemical stability. This allows zircon to be utilized in important applications including; ceramics, refractory industries, foundry, abrasives, TV glass, electronics, pigments, and catalysts [1][2][3][4]. In Egypt, widespread placer deposits of black sand are intermittently distributed along the northern coast.…”

Section: Introductionmentioning

confidence: 99%

Preparation of insoluble zirconate from Egyptian zircon via alkali fusion process to enhancement Al alloy performance

Mashaal

2023

Egypt. J. Chem.

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In this paper, Egyptian zircon was decomposed through the alkali fusion process to obtain the insoluble product (sodium zirconate) for developing the performance of Al alloy. For this purpose, Egyptian zircon was mixed with NaOH at specific ratios on the stainless steel crucible for starting the opening process. Several parameters such as NaOH /Zircon ratios, fusion temperature, and fusion time were investigated to obtain the optimum conditions to prepare sodium zirconate. Next the Al alloy was melted and sodium zirconate particles were added while stirring. Characterization of zircon opening products was performed by X-ray Diffraction, Scanning Electron Microscopy, and Energy Distributed X-ray. Also, the effect of insoluble product of the zircon opening product on the performance of Al alloy was evaluated via hardness and wear resistance tests. The results demonstrate that the optimum alkali fusion parameters to obtain high recovery of sodium zirconate were as follows; 1.5 NaOH/ZrSiO4 ratio, 650 •C as fusion temperature, and 3 hr as fusion time. On the other hand, adding 5% of sodium zirconate to Al molten metal leads to increasing in the hardness value and the wear resistance over than the value of Al alloy.

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New extraction technique of zirconium and hafnium from zircon mineral

Cited by 4 publications

References 24 publications

Local Structure, Structural, Vibrational, and Optical Properties of Natural Zircon

Local Structure, Structural, Vibrational, and Optical Properties of Natural Zircon

Influence on Ratio of NaOH/ZrSiO4 in Alkali Fusion for Amang Zircon Sand

Preparation of insoluble zirconate from Egyptian zircon via alkali fusion process to enhancement Al alloy performance

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