Stabilization of simulated lead sludge with iron sludge via formation of PbFe 12 O 19 by thermal treatment

Mao, Linqiang; Cui, Hao; An, Hao; Wang, Bing; Zhai, Jianping; Zhao, Yue; Li, Qin

doi:10.1016/j.chemosphere.2014.08.027

Cited by 29 publications

(19 citation statements)

References 48 publications

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“…All this make substituted barium hexaferrites promising for practical applications, such as radio-frequency absorbing coatings, magnetic recording, fabrication of permanent magnets and various components in microwave devices, telecommunication, etc. As a result, electromagnetic properties [19][20][21][22][23][24][25] and growth methods, such as sol-gel [26][27][28][29][30], co-precipitation [31,32] and the standard ceramic method [33,34], of these compounds are now under extensive investigations.…”

Section: Introductionmentioning

confidence: 99%

Influence of chemical substitution on broadband dielectric response of barium-lead M-type hexaferrite

Alyabyeva¹,

Torgashev²,

Жукова³

et al. 2019

New J. Phys.

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We report on the electrodynamic properties of the single crystalline lead-substituted M-type barium hexaferrite, Ba 0.3 Pb 0.7 Fe 12 O 19 , performed in the broad frequency range including radio-frequency, terahertz and sub-terahertz bands, which are particularly important for the development of microelectronic devices. We demonstrate how changing on a molecular level the chemical characteristics (composition, intermolecular interaction, spin-orbital interaction) of lead-substituted M-type hexaferrite influences its radio-frequency and terahertz electrodynamic response. Our results indicate a critical temperature range, 50 K<T<70 K, where significant changes of the electrodynamic response occur that are interpreted as freezing of dynamical oscillations of bi-pyramidal Fe(2b) ions. In the range 5-300 K, the heat capacity shows no sign of any phase transition and is solely determined by electron and phonon contributions. An anomalous electrodynamic response is detected at 1-2 THz that features a rich set of absorption resonances which are associated with electronic transitions within the fine-structured Fe 2+ ground state and are visualized in the spectra due to magnetostriction and electron-phonon interaction. We show that lead substitution of barium in barium hexaferrite, BaFe 12 O 19 , leads to the emergence of a pronounced dielectric and magnetic relaxational dynamics at radio-frequencies and that both dynamics have the same characteristic relaxation times, thus evidencing the bi-relaxor-like nature of Ba 0.3 Pb 0.7 Fe 12 O 19 . We associate the origin of the relaxations as connected with the motion of magnetic domain walls. In order to unveil crucial influence of chemical substitution on electrodynamic characteristics of the compound, we analyze our results on substituted compound in comparison with the data available for pristine barium (BaFe 12 O 19 ) and pristine lead (PbFe 12 O 19 ) hexaferrites. The obtained spectroscopic data on the dielectric properties of Ba 0.3 Pb 0.7 Fe 12 O 19 provide insight into fundamental phenomena responsible for the absorption mechanisms of the compound and demonstrates that chemical ionic substitution is an effective tool to tune the dielectric properties of the whole family of hexaferrites.

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Section: Introductionmentioning

confidence: 99%

Influence of chemical substitution on broadband dielectric response of barium-lead M-type hexaferrite

Alyabyeva¹,

Torgashev²,

Жукова³

et al. 2019

New J. Phys.

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“…chemical precipitation, ion exchange, coagulation, adsorption, and membrane processes) produce enormous amounts of lead-containing sludge that mainly composed of some insoluble lead(II) compounds (i.e. lead(II) carbonate, lead(II) oxide, lead(II) hydroxide and lead(II) sulfate) (Mao et al, 2014;Volpe et al, 2009;Yao and Naruse, 2009). However, the major portion of lead may converted into lead oxide at the high sintering temperatures.…”

Section: Methodsmentioning

confidence: 99%

Formation of lead-aluminate ceramics: Reaction mechanisms in immobilizing the simulated lead sludge

Shih

2015

Chemosphere

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“…On the other hand, in bottom-up approach the ions are chemically combined together to form the particles [21,22]. Industrial waste derived nanomaterials synthesis technique by bottom up approach includes co-precipitation [23][24][25][26][27], hydrothermal method [17,[28][29][30][31][32][33], Microwave irradiation [34] and by top down approach include ball milling technique [35][36][37][38][39]…”

Section: Recovery/synthesis Of Nanomaterials From Industrial Wastementioning

confidence: 99%

Synthesis of nanomaterial from industrial waste and its application in environmental pollutant remediation

Judith

Vasudevan

2021

Environmental Engineering Research

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Increased productions of waste from industries have persuaded in sustainable and naturally stable methods to reuse the waste. Utilization of wastes for the synthesis of nanomaterial is of significant importance due to its extensive variety of uses in various industrial sectors. This review focuses on potential options available for nanomaterial synthesis from waste produced by industrial activities and manufacturing processes. Possible application of industrial waste derived nanomaterial for the expulsion of organic and inorganic contaminants is discussed. Furthermore, the future opportunities and challenges in this emerging research area of converting industrial waste to nanomaterials are addressed.

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Stabilization of simulated lead sludge with iron sludge via formation of PbFe 12 O 19 by thermal treatment

Cited by 29 publications

References 48 publications

Influence of chemical substitution on broadband dielectric response of barium-lead M-type hexaferrite

Influence of chemical substitution on broadband dielectric response of barium-lead M-type hexaferrite

Formation of lead-aluminate ceramics: Reaction mechanisms in immobilizing the simulated lead sludge

Synthesis of nanomaterial from industrial waste and its application in environmental pollutant remediation

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