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lead-oxide
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Synthesis and properties of lead oxide carbonate
, Article Inorganic Materials ; Volume 42, Issue 10 , 2006 , Pages 1099-1103 ; 00201685 (ISSN) ; Alamolhoda, A. A ; Sharif University of Technology
2006
Abstract
PbCO 3·PbO and PbCO 3·2PbO compounds were prepared by thermal methods. The structure of each compound was determined by using XRD technique, and their purity was confirmed by analytical methods (98%). Also the thermal characteristics of each compound were investigated by thermogravimetry. At 600°C both compounds decompose completely and produce lead(II) oxide. © 2006 Nauka/Interperiodica
Investigation of thermal behavior of α-PbO and β-PbO IN O2 atmosphere
, Article Metalurgija ; Volume 57, Issue 4 , 2018 , Pages 287-290 ; 05435846 (ISSN) ; Nazari Alavi, A ; Mirzai, M ; Sharif University of Technology
Faculty of Metallurgy
2018
Abstract
The compounds α-lead oxide (α-PbO) and β-lead oxide (β-PbO) were purchased from Merck co. and used for thermal investigations in laboratory. The compound was heated in a thermogravimeter at different temperature, from 25 to 400 °C. The used gas atmosphere was O2. The received products were investigated by X-ray diffraction (XRD) technique. The received product Pb3O4 was confirmed by XRD. The textures of two different morphologies of α-PbO, β-PbO and the product Pb3O4 is investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM) techniques. © 2018, Faculty of Metallurgy. All rights reserved
Thermal behavior of alkaline lead acetate, a study of thermogravimetry and differential scanning calorimetry
, Article Scientia Iranica ; Volume 15, Issue 4 , 2008 , Pages 435-439 ; 10263098 (ISSN) ; Alamolhoda, A. A ; Hashemian, S. J ; Sharif University of Technology
Sharif University of Technology
2008
Abstract
The compound, alkaline lead acetate, Pb(CH3COO)2·PbO·H2O (ALA), was purchased from the Fluka Company. The X-ray diffraction film and SEM electron microgaph of this compound were obtained and reported in this paper for the first time. The thermal behavior of alkaline lead acetate (ALA) was studied using thermogravimetery (TGA) and Differential Scanning Calorimetery (DSC) techniques under an O2 gas atmosphere from 25 to 600°C. Four distinct energy changes associated with weight changes were observed, all of them being exothermic in the DSC results. The amount of ΔH for each peak is reported. © Sharif University of Technology
Development and biomedical application of nanocomposites: In situ fabrication of ZnO-PbO nanocomposite through microwave method
, Article Materials Technology ; Vol. 29, issue. 4 , July , 2014 , p. 227-231 ; Aieneravaie, M ; Dorosti, V ; Sadrnezhaad, S. K ; Sharif University of Technology
Abstract
A novel nanocomposite of ZnO-PbO with flower-like nanostructure was fabricated from zinc acetate and lead nitrate as principle raw materials via an in situ process. The novelty of this study consists in the use of a common approach for fabricating of ZnO and PbO nanoparticles simultaneously. From these experiments the conclusion might be drawn that Zn(NH4) 2 4+ ions and Pb(OH)2 act as precursors for the nucleation and growth of ZnO and PbO respectively under microwave irradiation. The precursors formation were carried at two stages: reaction between zinc ions and lead nitrate with ammonium ion and hydroxide sodium respectively. The average crystalline size of Zno and PbO has been analysed by...
Preparation and characterisation of diopside-based glass-ceramic foams
, Article Ceramics International ; Volume 38, Issue 3 , 2012 , Pages 2005-2010 ; 02728842 (ISSN) ; Nemati, A ; Eftekhari Yekta, B ; Alizadeh, P ; Sharif University of Technology
2012
Abstract
Foaming and crystallisation behaviours of compacted glass powders based on a diopside glass-ceramic composition were investigated using the sintering route. The foaming agent was 2 wt.% SiC particles. The effect of PbO on the foaming ability of glasses was investigated. The results showed that the addition of PbO not only improved the foaming ability, by improving the wettability of the glass-SiC particles but also increased the crystallisation temperature and widened the temperature interval between the dilatometric softening point and the onset of crystallisation. The glass-SiC wetting angle was decreased from 85°for the lead-free glass, to 55°for the glass that contains 15 wt.% PbO
Adsorption of lead ions in aqueous solution using Yttrium oxide nanoparticles
, Article Journal of Nano Research ; Volume 16 , 2011 , Pages 83-87 ; 16625250 (ISSN) ; Ahmadi, S. J ; Hosseinpour, M ; Sharif University of Technology
2011
Abstract
By a single-step supercritical hydrothermal synthesis method, yttrium oxide nanoparticles were successfully prepared without additional treatment. Yttrium oxide nanoparticles were employed as an adsorbent to study the adsorption of some heavy metal ions. This study revealed that nano structure yttrium oxide was an effective adsorbent for removal of lead ions from aqueous solutions
Corrosion behavior of ZrO2-SiO2-Al2O3 refractories in lead silicate glass melts
, Article Journal of the European Ceramic Society ; Volume 31, Issue 5 , 2011 , Pages 715-721 ; 09552219 (ISSN) ; Ahmadi, A ; Kakooei, S ; Sadrnezhaad, S. K ; Sharif University of Technology
2011
Abstract
High-temperature (1200-1350°C) corrosion of fused-cast ZrO2-Al2O3-SiO2 (ZAS) refractory contacting lead silicate glass melt (LSG) containing 68.5wt% PbO was investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), differential scanning calorimetry (DSC), x-ray diffraction (XRD), thickness measurement and Archimedes density measurement. ZAS durability was improved by baddeliyete content and deteriorated with open porosity proportion, corundum percentage and eutectic mixture presence. Diffusion of lead resulted in fusion-temperature lowering of the glassy layers embedded within the ZAS particles. Heating caused viscosity drop across the interface, loosening the...
Novel hot milling approach for the synthesis of fine PbZr0.95Ti0.05O3 powders
, Article Ceramics International ; Volume 45, Issue 18 , 2019 , Pages 24176-24181 ; 02728842 (ISSN) ; Hojaji Najafabadi, A. R ; Safaei, S ; Sadrnezhaad, Kh ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
A new and effective hot milling system was designed and applied to the synthesis of PbZr0.95Ti0.05O3 (PZT) powder. PbO, ZrO2 and TiO2 powders were used as starting materials and hot milled at various temperatures ranging from 10 ̊°C to 800 ̊°C. The obtained powders were characterized by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). Results indicated that pure, crystalline, and fine PZT powders with the average particle size of 170 nm can be successfully synthesized directly after a relatively short synthesis time of 12 h at lower temperature of 800 ̊°C by the hot milling technique. In contrast to this method, this study demonstrates that conventional solid-state...
Effect of a synthesized pulsed electrodeposited Tin/pbo2-ruo2nanocomposite on zinc electrowinning
, Article Industrial and Engineering Chemistry Research ; Volume 60, Issue 31 , 2021 , Pages 11737-11748 ; 08885885 (ISSN) ; Rashchi, F ; Ghalekhani, M ; Dolati, A ; Razi Astaraei, F ; Sharif University of Technology
American Chemical Society
2021
Abstract
Nowadays, there is a growing interest in synthesizing electrodes used in zinc electrowinning, increasing active surface area, decreasing specific energy consumption, and the oxygen evolution reaction (OER) overpotential. In this study, modified nanocomposite anodes were synthesized by applying pulsed and constant direct current electrodeposition to improve the catalytic activity of the electrodes toward the oxygen evolution reaction (OER) and reduce energy consumption in zinc electrowinning. By decreasing particle size, the active surface area of PbO2-RuO2 nano-mixed composite electrode was 2.88 and 14.22 times greater than PbO2-RuO2 microcomposite and pure PbO2 electrodes, respectively....
Thermal resistance, tensile properties, and gamma radiation shielding performance of unsaturated polyester/nanoclay/PbO composites
, Article Radiation Physics and Chemistry ; Volume 146 , 2018 , Pages 5-10 ; 0969806X (ISSN) ; Razavi, M ; Ahmadi, J ; Kosari, M ; Abolghasemi, H ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
Composites of unsaturated polyester containing 5 wt% nanoclay and different amounts of lead monoxide particles (0, 10, 20, and 30 wt%) were prepared. XRD patterns showed the exfoliation of nanoclay layers in the polymer. Morphological properties of the composites were studied using SEM micrographs. The prepared composites were investigated for their thermal resistance and mechanical properties using thermogravimetric analysis and tensile testing method, respectively. Addition of lead monoxide to the polymer worsened its thermal resistance and tensile properties, whereas the observed negative effects could be moderated by the clay nanoparticle. Gamma attenuation performance of the composites...
Fabrication of a form-stable phase change material with green fatty acid and recycled silica nanoparticles from spent lead-acid battery separators with enhanced thermal conductivity
, Article Thermochimica Acta ; Volume 693 , November , 2020 ; Pircheraghi, G ; Sharif University of Technology
Elsevier B.V
2020
Abstract
Massive amounts of spent lead-acid battery separators with 50 wt % silica nanoparticles (SiNPs) can be recycled for further use. One compelling application is form-stable phase change materials (FSPCMs). This study proposes a novel tertiary eutectic mixture of green and non-toxic lauric acid, palmitic acid, and paraffin, and recycled SiNPs to find a sustainable approach to deal with industrial wastes and energy consumption. Fatty acids and paraffin are promising for thermal energy storage in buildings. However, they lack sufficient thermal conductivity, mechanical strength, and suffer from leakage. To give mechanical strength, high-density polyethylene (HDPE) was added and sintered....