Topic
Litharge
About: Litharge is a research topic. Over the lifetime, 217 publications have been published within this topic receiving 2963 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: The Raman spectra of plattnerite, lead(IV) oxide, PbO2 and of the lead pigments red lead, lead monoxide, lead white, and of their laser-induced degradation products were recorded using a range of different excitation lines, spectrometer systems and experimental conditions.
Abstract: The Raman spectra of plattnerite [lead(IV) oxide,
PbO2] and of the lead pigments red lead
(Pb3O4), lead monoxide [PbO, litharge (tetragonal)
and massicot (orthorhombic)], lead white [basic lead carbonate,
2PbCO3·Pb(OH)2] and of their laser-induced
degradation products were recorded using a range of different excitation
lines, spectrometer systems and experimental conditions. The degradation of
PbO2 is more extensive along the pathway PbO2
→
Pb3O4
→ PbO (litharge) → PbO (massicot) the
shorter the wavelength of the excitation line and the higher its power. The
Raman spectrum of PbO2, which is black and of the rutile
structure, is particularly difficult to obtain but three bands, at 653, 515
and 424 cm−1, were identified as arising from the
b2g, a1g and eg modes respectively, by
analogy with the corresponding modes of isostructural SnO2 (776,
634 and 475 cm−1). A further oxide was identified,
PbO1.55, the Raman spectrum of which does not correspond to that
of any of the laser-induced degradation products of PbO2 at any
of the wavelengths used. The Raman results are critical to the future use
of Raman microscopy for the identification of lead pigments on
artworks.
267 citations
TL;DR: Compressive strength is higher than 35 MPa in all cases and water absorption diminishes as the lead slag content increases, and a comparison of leaching results before and after polymerisation reveals that pH is an important factor as Pb is immobilised in the binding phase, unlike Zn and As.
143 citations
TL;DR: In this paper, the optical properties of polycrystalline SnO thin films were characterized via spectroscopic ellipsometry, and the relationship between the refractive index n and the bandgap E-g was investigated.
Abstract: Amorphous SnO thin films were prepared on quartz and 190 nm SiO2/Si(001) substrates by electron beam evaporation. X-ray diffraction results reveal that amorphous SnO transforms into polycrystalline alpha-SnO (tetragonal litharge structure) after rapid thermal annealing in Ar ambient at 350-400 degrees C and starts decomposing into o-SnO2 (orthorhombic structure) with the expulsion of Sn atoms at 450-500 degrees C. The optical properties were characterized via spectroscopic ellipsometry. The polycrystalline SnO thin films have a higher refractive index n and a narrower bandgap E-g than the amorphous ones, which is due to the polarizability enhancement in the crystallization process. Moreover, the relationship between n and Eg of the amorphous and polycrystalline SnO thin films can be explained by the "Moss rule" law, and a decreasing trend in n was verified with the transformation from SnO to SnO2. Bottom-gate-type thin film transistors (TFTs) employing polycrystalline SnO channels on the SiO2/Si(001) substrates exhibit p-type field-effect transistor characteristics. The optimum field-effect mobilities mu(sat) and mu(lin) are 0.46 and 0.87 cm(2) V-1 s(-1), respectively, which are the same order of magnitude as those reported for epitaxial SnO TFTs. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3385390] All rights reserved.
140 citations
TL;DR: A positive correlation between lead and antimony concentrations of the yellow and green opaque glasses, plus a consistent excess of lead oxide in these glasses, suggests the use of antimony-rich cupellation litharge as the source for the Pb 2 Sb 2 O 7 colorant.
Abstract: Elemental analyses have been conducted on 61 coloured opaque glasses from the Malkata and Lisht New Kingdom glass factories. The presence of tin in several of the blue glasses suggests that a bronze casting byproduct or corrosion product was the source of the copper colorant for these glasses. A positive correlation between the lead and antimony concentrations of the yellow and green opaque glasses, plus a consistent excess of lead oxide in these glasses, suggests the use of antimony-rich cupellation litharge as the source for the Pb 2 Sb 2 O 7 colorant in these glasses. The metallurgical byproducts used to colour the Malkata and Lisht glasses provide an explicit mechanism for Peltenburg's theory of interaction between second millennium BC glassmakers and contemporary metalworkers/
110 citations
TL;DR: In this article, Fourier transform infrared spectroscopy (FT-IR) has been used to investigate the effects of lead oxide on the drying process of linseed oil, and the changes occurring during the drying of oil and the influence generated by the use of PbO were monitored by integrating absorption bands of interest.
92 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 4 |
| 2019 | 2 |
| 2018 | 3 |
| 2017 | 3 |
| 2016 | 4 |