In the article “Ultrasonic measurement and elastic properties of the PbO-SrO-B2O3 glass system”, DOI number https://doi.org/10.1590/S1983-41952020000400015, published in IBRACON Structures and Materials Journal ISSN 1983-4195, v.13, n.4, e13415, 2020, on page 1-7:
2 CHARACTERIZATION TECHNIQUES
2.2 Density and molar volume
Where it reads:
“ Where, ρ is the density, ρH is the density of the water, ma and md are the mass of the sample in the air and the mass of the submerged sample, respectively.”
It should be read:
Where ρ is the density, ρH is the density of the water, ma is the mass of the sample in the air, md is the mass of the submerged sample, m1 is the solid sample mass, m2 is the pycnometer mass totally filled with distilled water, and m3 is the pycnometer mass + remaining distilled water + solid sample mass.”
2.3 Ultrasonic measurements
Where it reads:
It should be read:
3 RESULTS AND DISCUSSION
3.2 Ultrasonic study
Where it reads:
Having k as volumetric modulus of elasticity,
It should be read:
Having L longitudinal module,
Where it reads:
It should be read:
Where it reads:
Longitudinal Velocity (VL), Transverse velocity (Vs), Average sound velocity (Vms), Longitudinal Module (L), Transversal Modulus (G), Bulk Module (K) e Young's Module (E).
It should be read:
Longitudinal Velocity (VL), Transverse velocity (Vs), Average sound velocity (Vms), Longitudinal Module (L), Transversal Modulus (G), Bulk Module (K) e Young's Module (E).
Where it reads:
Debye Temperature , Poisson Coefficient , Acoustic Impedance (Z) and Coefficient of Thermal Expansion (A).
It should be read:
Debye Temperature , Poisson Coefficient , Acoustic Impedance (Z) and Coefficient of Thermal Expansion (A).
3.3 FTIR infrared spectroscopy
Where it reads:
The spectrum in region (I) has bands close to 2300-2350 cm-1, the vibrations of different C-O bonds or ambient CO2 concentrations in the Infrared [14] are attributed, these are not part of the glass structures.
It should be read:
The spectrum in region (I) has bands close to 2300-2350 cm-1, the vibrations of different C=O bonds of ambient CO2 concentrations in the Infrared [14] are attributed, these are not part of the glass structures.
ACKNOWLEDGEMENTS
To Prof. Salmon Landi Jr. for contributing the information that resulted this errata document.
Publication Dates
-
Publication in this collection
02 July 2021 -
Date of issue
2021