18 Questions 18 Answers 0 Followers
Questions related from Naziya Parveen
Generally, optical band gap of glasses decreases with an increase of modifier content due to the formation of NBOs. But in my oxide glasses, increase of optical band gap with increase of modifier...
08 April 2015 2,590 9 View
If Tg of a glass sample is determined at two different gas flow rates viz 50 ml/min and 30 ml/min then is there any change in Tg value??
12 November 2014 468 8 View
I want to know the formula to find the crystallinity of a polymer blend using DSC . As the sample is amorphous in nature, so we won't get the crystallization peak.
20 October 2014 3,104 5 View
Due to corrosive electrodes, the resistance is developed. how to subtract it from the measured conductivity?
31 May 2014 3,047 1 View
Can anybody explain in detail the dependence of polaron hopping on conductivity and temperature in glasses?
23 April 2014 882 1 View
During the synthesis of glass samples, for 1 composition I got a milky white shiny opaque sample rather than a transparent glass. In some articles I read that such samples are called opal glass....
06 March 2014 8,109 3 View
I got glass samples at two end compositions but when I tried for middle composition, glass is not forming. The difference of middle composition was just 0.05mol%.
20 January 2014 5,699 13 View
If the melt exceeds the melting temp then the melt can form the glass after quenching? If it can form the glass then what are the conditions under which quenching has to be done?
04 January 2014 5,019 5 View
Refractive index and optical band gap of glasses
03 September 2013 3,126 2 View
It is suggested to use benzene as an immersion liquid while determining the density of glasses by archimedes principle. But benzene is a volatile liquid. I tried to determine the density of my...
27 August 2013 9,515 5 View
Before making the glass sample I determined the glass transition of two precursors individually, with DSC, but my results are different from theory. For one of the precursors I got Tg more than...
13 August 2013 8,175 1 View
My work is on glasses. I want to know the melting point of the sample before synthesis, so that i can melt it to that temp in a furnace. So, can i mix the precursors (powders) in the required...
02 August 2013 4,221 3 View
What are the definations of pair correlation function (PCF) and Radial distribution function (RDF)? In some sources I read that RDF is also called as PCF, and in some other sources I read that...
24 July 2013 6,718 8 View
I want to understand those terms in practical means, what actually those terms represents practically. I have gone through many sources of information but I am unable to understand what actually...
24 July 2013 9,903 5 View
I am working on glasses, I want to know the more precise method for the density measurement.
02 July 2013 6,574 3 View
For the analysis of Raman spectra, why are these spectra studied individually? Do they refer to information of spectra at high frequency bands and low frequency bands? Kindly explain the...
14 June 2013 8,069 1 View
In DSC thermal analysis, what is the difference between Thermal stability (Tx - Tg), Hruby's ratio {(Toc-Tg) / (Tm -Toc} and thermal stability parameter {delta T (Tc - Toc) / Tg }. These three...
06 June 2013 3,502 3 View
I am working on tellurite based glasses, I want to know the difference between VV and Vh polarisation.
03 June 2013 5,520 2 View
