Synthesis and characterisation of nanoscale magnesium oxide powders and their application in thick films of Bi2Sr2CaCu2O8

Bhargava, Atit; Alarco, José A.; Mackinnon, Ian D.R.; Page, David; Ilyushechkin, Alexander

doi:10.1016/s0167-577x(97)00148-1

Cited by 126 publications

(60 citation statements)

References 17 publications

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“…refractory, paints, paper, plastics, rubber, oil, pharmaceutical, fertilizer, animal feed, additive in superconductor products, waste treatment agent for neutralizing acids or cleaning water and as a catalyst material 1,2 . Most commercial MgO powders are synthesized by the calcinations of forms of Mg(OH) 2 , such as brucite or precipitate from sea water, and thermal decomposition of MgCO 3 , such as magnesite 3 . In such powders, the primary particles remain aggregated, usually in a shape similar to that of the precursor compound.…”

Section: Introductionmentioning

confidence: 99%

“…For more specific applications, an inexpensive method to synthesize finer and less aggregated powders with controllable structure and morphology is necessary. For instance, fine powders can facilitate component sintering at lower temperature for refractories while the ratio of high surface area to volume of the powder may provide a higher activity as catalyst and higher removal efficiency in waste water treatment 2 . Some groups have devoted to the synthesis of fine MgO powders 4,5 .…”

Section: Introductionmentioning

confidence: 99%

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Low temperature synthesis of magnesium oxide and spinel powders by a sol-gel process

Yin²,

et al. 2010

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Magnesium oxide and magnesium aluminate (MgAl 2 O 4 ) spinel (MAS) powders have been synthesized by a simple aqueous sol-gel process using citrate polymeric precursors derived from magnesium chloride, aluminium nitrate and citrate. The thermal decomposition of the precursors and subsequent formation of cubic MgO and MAS were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetrydifferential scanning calorimetry (TG-DSC) and Fourier transform infrared spectra (FTIR). The single phase cubic MgO powder and MAS powder form after heat treatment at 800 and 1200 °C, respectively. The particle size of the MgO and MAS powders is about 100 nm and several micrometers, respectively. Ball milling eliminates the size of MgO and MgAl 2 O 4 spinel powders by decreasing the conglomeration of the powders.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of magnesium oxide and spinel powders by a sol-gel process

Yin²,

et al. 2010

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“…Magnesium [1][2][3] and its compounds, such as wide-band gap insulators magnesium oxide and magnesium hydroxide (7.8 and 5.7 eV respectively) have received wide scientific interest in the last decade as they have applications in catalysis, 4 toxic waste remediation, 5 additives in refractory, paint, superconductor products, [6][7][8] and in steel manufacturing because of its high corrosion-resistant behavior. 9 Nanostructures of MgO and Mg(OH) 2 have recently received much attention due to potential magnetic and optical novel properties stemming from Mg or O vacancies.…”

Section: Introductionmentioning

confidence: 99%

Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite

et al. 2018

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We use wet treatment to integrate red-luminescent Si nanoparticles with Mg-based wide-bandgap insulators Mg(OH) and MgO (5.7 and 7.3 eV respectively). In the process, Mg2+ is reduced on Si nanoparticle clusters, while suffering combustion in water, producing a spatially inhomogeneous Mg(OH)2/MgO-Si nanoparticle composite with an inner material predominantly made of Si, and a coating consisting predominantly of magnesium and oxygen (“core-shell” geometry). The nanocomposite exhibit luminescence covering nearly entire visible range. Results are consistent with formation of Mg(OH)2/MgO phase with direct 3.43-eV bandgap matching that of Si, with in-gap blue-green emitting states of charged Mg and O vacancies. Bandgap match with nanocomposite architecture affords strong enough coupling for the materials to nearly act as a single hybrid material with novel luminescence for photonic and photovoltaic applications.

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“…In the first part of this work [15] we study the effect of doping YBCO with 0. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.…”

Section: Introductionmentioning

confidence: 99%

The influence of magnetic nano metal oxides doping on structure and electrical properties of YBCO superconductor

Salama

El-Hofy

Rammah

et al. 2016

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Superconductor samples of YBa 2 Cu 3 O 7−δ (YBCO)+x where x=0.1, 0.2, 0.3, 0.4 and 0.5 wt% of nano metal oxides namely Cr 2 O 3 , Co 3 O 4 and Mn 3 O 4 namely are synthesized by the solid-state reaction route. Both x-ray diffraction and electron microscopy have been employed to study the phase identification and the microstructure of these samples. Transition temperature of the samples has been determined by four probe resistivity measurements. The x-ray diffraction patterns indicate that the gross structure of YBCO does not change with the substitution of three types of nano metal oxides with different doping level. The critical transition temperature (T c ) is found to decrease with the increases of doping level. Mn 3 O 4 has highest T c value which may be due to flux pinning from some defects and the rapid suppression in T c with increasing concentration of Mn 3 O 4 may be due to the cooper pair breaking and the hole filling in the CuO 2 planes.

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Synthesis and characterisation of nanoscale magnesium oxide powders and their application in thick films of Bi2Sr2CaCu2O8

Cited by 126 publications

References 17 publications

Low temperature synthesis of magnesium oxide and spinel powders by a sol-gel process

Low temperature synthesis of magnesium oxide and spinel powders by a sol-gel process

Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite

The influence of magnetic nano metal oxides doping on structure and electrical properties of YBCO superconductor

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