Naziya Parveen

12 Questions 13 Answers 0 Followers

Questions related from Naziya Parveen

What is the reason for the increase of the optical band gap of glasses with an increase in modifier content?

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 2,541 9 View

In DSC, do the purged gas flow rate effect glass transition temperature Tg of a glass sample?

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 441 8 View

How can one find the crystallinity of a polymer blend using DSC?

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 3,070 5 View

Can anybody help me with small polaron hopping theory in glasses.

Can anybody explain in detail the dependence of polaron hopping on conductivity and temperature in glasses?

23 April 2014 849 1 View

What is an opal glass? How to identify it?

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 8,079 3 View

Does the glass forming ability (GFA) depend strongly on the composition of the glass system?

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 5,665 13 View

What if heating exceeds the melting temp during the synthesis of glass?

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 4,992 5 View

Does the melting point (obtained from DSC) of the precursors mixture will remain same even after the synthesis of sample from the same mixture?

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 4,201 3 View

Can somebody advise on the difference between the Pair correlation function and the Radial distribution function?

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 6,688 8 View

Explain in simple words, In neutron diffraction, what is Structure factor and Scattering length?

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 9,871 5 View

In Raman spectroscopy, what information do HH/VV and HV/ VH polarisation spectra gives individually. Why these are studied separately?

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 8,048 1 View

Can anybody explain what is VV and VH scattering in Raman spectroscopy? How these can be achieved?

I am working on tellurite based glasses, I want to know the difference between VV and Vh polarisation.

03 June 2013 5,489 2 View