The synthesis of tricalcium silicate phases in nanoscale particles
was achieved by two distinct techniques: the solid-state reaction and the
sol-gel approach. The solid-state procedure depends on the direct firing of a
mixture of molar ratios of ultra-pure calcium carbonate and silicon dioxide at
around 1500°C, whereas the sol-gel method is dependent on when calcium nitrate
tetrahydrate and tetraethyl orthosilicate combine at pH = 4.5, a C3S gel is
created. An investigation was conducted to compare the two produced powders
using various techniques such as infrared spectroscopy, scanning electron
microscopy (SEM), pH values, calcium ion concentration, micro-hardness test,
and X-ray diffraction analysis. The agar diffusion method is used to assess the
antibacterial activity of free-released Ca2+ ions. The results show that
compared to the sample made using a solid-state process, the C3S powder
synthesized using the sol-gel approach has higher chemical reactivity with an
increasing rate of hydration reaction. The sol-gel sample has a higher pH and
calcium ion concentration, a more alkaline hydration medium, improved hardness
values, and a faster setting time. The test sol-gel sample's higher influence
from Ca ions generated throughout the hydration process allowed it to
demonstrate substantially better antibacterial activity.
Author(s) Details:
Ass. Prof. H. K. Abd El-Hamid,
Department of Refractories, Ceramics and Building Materials,
National Research Centre (NRC), Dokki, 12622, Cairo, Egypt.
Please see the link here: https://stm.bookpi.org/CICMS-V9/article/view/14338
No comments:
Post a Comment