Haider Ali

6 Questions 3 Answers 0 Followers

Questions related from Haider Ali

What is the chemical name of Zn(0.3) Mg(0.7) Cr(x) Fe(2-x) O(4)?

Is this ferrite is from the spinel group? can anyone explain the tetrahedral and octahedral sites pf elements for this above formula? If Cr(2+) and if Cr(3+) is doped, describe the...

09 September 2020 4,666 2 View

In transmission spectra, the basic reason behind the red shift of doped manganese doped MgAl2O4 samples?

Manganese was doped upto 1% in MgAl2O4 spinel. As doping concentration increase,I found a gradual red shift in the transmission spectra. what is the basic cause of red shift?

04 July 2019 4,487 3 View

How 1% Mn(2+) doped in MgAl2O4 change XRD pattern to greater angle?

Mn has greater ionic radii than Mg ion and if Mn replace Mg ,shifting should be towards lower angle; but in my case peaks are shifted toward greater angle. Then in 2% Mn doped peaks shift to...

17 September 2018 3,408 2 View

When doping is less than 5%.How XRD patterns confirm doping concentration is increasing ? How to cofirm doping is interstitial or substitutional?

I have done XRD of my sample Mn doped MgAl2O4. Doping concentration was very low ( less than 5%). Now how XRD pattern will detect the doping ratio whether it is decreasing or increasing, as there...

10 September 2018 7,448 7 View

How n why water molecules are present still at 710 or 900 C ,as we see water molecules viberations in FTIR ?

when we heat up sample power or gel up-to (710-900) degree Celsius, results performed by FTIR, result shows water molecules vibrations v(O-H) and sigma(OH) etc. this is very surprising for me. why...

30 January 2018 4,022 3 View

How to find allowed reflections for XRD in SC, FCC BCC &DC??

Which method is used for finding allowed reflections??

26 January 2018 5,629 3 View