Himamaheswara Rao Vemula

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Questions related from Himamaheswara Rao Vemula

How to estimate the glass forming region throgh the XRD data?

Glasses with certain composition of different chemical compounds forms in a specific range only. Beyond the range it will be difficult to form the glass in normal melt quenching. is there any...

19 November 2014 212 4 View

How can I find the absorption edge in the UV-Vis absorption spectrum?

It is difficult to find the exact absorption edge for my UV-Vis spectrum as it is having wide hump in the UV region. Then how to estimate the absorption edge?

04 August 2014 9,243 4 View

Why do the glasses possess both direct band gap and indirect band gap?

What is the phenomena for the glasses to possess both direct and indirect band gaps?

22 April 2014 2,580 4 View

Is there any formula to find the glass transition temperature as a function of composition?

Sometimes I am unable determine the required temperature to melt the glass composition. Is there any formula to estimate the glass transition temperature as a function of composition?

03 April 2014 3,448 11 View

Is there any method to find the refractive index of opaque glass samples?

During synthesis of glasses I get samples with opaque structure. I need to measure the refractive index of that samples in visible or infrared region. What is the method that can be used to...

03 April 2014 1,651 10 View