Mostofa Shamim

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Questions related from Mostofa Shamim

We are open for industry-academic collaboration (joint research and paper publication only). If anyone interested please let me know personally ?

Brisil (www.brisil.com) produces green precipitated silica from rice husk ash on a commercial scale. We are open for collaboration ((joint research and paper publication only), if anyone is...

05 March 2022 9,126 0 View

The crystal radius of Na+ and Ca+2 is 116 and 114 pm respectively (for CN-6). Looking for an explanation of this behavior ?

Ca+2 has an extra couple of shell (3s2 and 3p6) than Na+. Despite that, for any coordination number, Na+ has a larger crystal radius compared to the Ca+2. I understand that Ca+2 has a higher...

28 September 2020 4,975 4 View

If Avrami coefficient value (n) is <1, then what is the significance of ‘n’ and how to correlate the ‘n’ with the propensity of nucleation and growth?

I have studied the kinetics of a multiple stage (three stages) thermal decomposition reaction of three solid materials (layered double hydroxides). These materials are similar in structure with a...

09 February 2016 1,322 13 View

What should be the rate-determining step in any multiple stage decomposition reaction of solid-state materials?

A solid-state material follows a three stage decomposition pathway with different kinetic triplets. How can I identify the rate-determining stage in that reaction? As it is a heterogeneous...

11 January 2014 1,215 9 View