crystallites (grain) size and strain through W-H plot method - 13

[@chemistry_doctor]

Amazing and helpful for all the researchers i am proud to follow you

[@parthshah6846]

Very informative thank you, it helps in my dissertation project for catalyst analysis thank you once again

[@nanoworld6122]

Great to hear!

[@mdmazbahuddin5592]

Sometimes I don't get FWHM in nilfitpeaks chart after peak fitting using gaussian or Lorentz profile. What could be the reason? But when I use Gauss profile FWHM is shown in nilfitpeaks chart. My samples are mostly semicrystalline. Your videos were of great help in my project. Many thanks. Keep uploading such tutorials.

[@hamdirihab3319]

Thank you so much, but I find negative slope, is it normal?

[@navdeepsharma2102]

Thanks a Lot sir, great have no words, lots of thanks, hope to make more viedio on other parameters, obtained on XRD and characterization methods

[@malihaparvin4224]

May Almighty gives you the best reward for this work, really helpful.

[@rv3716]

It was a very helpful and detailed video for those who are working on this topic. Thank you so much!

[@nanoworld6122]

Glad it was helpful!

[@nanoworld6122]

Glad it was helpful!

[@nanoworld6122]

Glad it was helpful!

[@pugazhinthiran4187]

Thank you very much for your detailed information

[@dazza9129]

My strain ended being a negative slope. Was there something wrong?

[@clinktanr4617]

No words to say amazing PPT point to point explanation... Thanks a lot..

[@nanoworld6122]

Thanks and welcome

[@adilmansoor2716]

indeed a simple and informative.thanks a lot.

[@nanoworld6122]

Glad it was helpful!

[@MyTwinBloggers]

Good video.. really helpful

[@usmanchem08]

thank you for this great video. helped me a lot.

[@zhenhongxue2242]

关注，点赞加分享，谢谢up主的分享！

[@Deathunter2]

Very good and informative Video, keep the work up! :)

[@abdulolaoye9612]

Thank you for this video. please if someone have another material present in the primary material you are working on. Am I going to consider both primary peaks and secondary peaks or primary peaks alone?

[@akarakoca]

First of all thank you for your sharing. i want to ask related W-H method. when we fit curvefitting if r^2 value far from 1 what we do to fix this? Some peaks maybe subtract?

[@amrradwan4279]

Thanks a lot for this great job, please continue

[@madeehatabassum9478]

Thank you for the amazing video. For my some XRD data there is a problem ( Fit did not converge) appears. why it happens?

[@nanoworld6122]

either the data required a baseline correction or smoothing. Do Not Select low intensities Peaks

[@riyadhkakaiey5700]

well done. you made it very easy. thanks a lot, I hope to continue to share more and more videos...

[@abhishekjaiswal7143]

Sir, can I get this word file that u used to explain?

[@sebacbsee-corner6790]

Thank you so much, it was really helpful 👍

[@nanoworld6122]

Glad to hear that!

[@tahsinmozaffor3627]

Thanks a lot very easily explained

[@ricardohoffmannvalencia6771]

I love your videos

[@sta_1979]

Could you please tell how to obtain a modified W-H plot from XRD peaks?

[@rutikasawant9936]

Thank you so much!! It was really helpful..

[@sarveshkumargupta6988]

Very interesting and knowledgeable video. Thank you, Sir.

[@rushikesh_here]

it is very helpfull to me. thanks you ..

[@nanoworld6122]

Happy to help

[@kranthibedala]

Excellent sir and Thanks a lot sir 🙏🙏🙏🙏

[@rupammandal3717]

great as always

[@Physics5915]

When we plot in polynomial fit, which is taken as slop

[@chiranjitchaliha5318]

Sir since adjacent r square value is not near to 1..its a bad fit...so will it be correct...to conclude the result without making adjacent r square to value as 1

[@UmaShankar-rr8py]

Very usefull information sir. But there is any possible to plot other three methods also halder Wagner plot

[@aliansarihamedani8057]

Nice job

[@ParameswaranPed22d008]

You did not divided the angle @ FWHM convertion to Radians @ 15.40. Is that ok. Can you clarify me?

[@emmakhan14]

brilliant job (y)

[@iqrajabbar5287]

Thanks,V nice ,easy method

[@saddiqueakbar4774]

appreciated help for students. can you please teach us how to calculate dislocation density in XRD. Edge and screw dislocation

[@dr.p.s.raghavanprofessor-c377]

Thanks for the detailed demo for calculating crystallite size. Can you comment on the value of the strain and the information obtained from it?

[@arjunkrishna4815]

sir/madam can you define what is microstrain?

[@chinsoon1068]

Hi, thanks for the video. I have a question. The angle used for calculation was not divided by 2. I am not sure if I understand it wrongly or is there any mistake.

[@nanoworld6122]

I have divided it, please watch it again from 13:35 to 13:48

[@arjunkrishna4815]

@@nanoworld6122 Sir can you explain why u neglected the error in the microstrain ?

[@Surya-uv3bz]

i am getting negative intercept , what to do? please help me out..

[@awaisahmed2907]

From where to get correlation coefficient values (R2) ?

[@rac5205]

I follow the same step but after fitting the peaks the data doesn't give the FWHM value.... Others are same... How can i take my FWHM value..?

[@nanoworld6122]

This is because, you performed the fitting using Gaussian instead of Guss

[@rac5205]

@@nanoworld6122 thanks for the reply..

[@safoorashabir819]

sir please explain how to calculate mass fractions of aplha and beta phase in titanium aaloy from xrd data

[@annisaf4689]

Can you explain to me why Williamson-Hall more accurate than scherrer method. What the advantages of using Williamsoh-Hall method I mean

[@nanoworld6122]

Scherer equation is a rough theoretical estimation while W-H plot is more accurate. Because W-H plot separate micro strain from the grain size while this value is embedded is Scherer equation.

[@faheemwani1996]

sir how to calculate lattice parameter of composite film with different concentrations of doping

[@maziidahh]

Sir, if there is a secondary phase in the XRD peaks, should we include the secondary peaks' information when calculating the FWHM?

[@wafazina4225]

Is it possible to use X'Pert high score for calculation of cristalline size and strain through this method W-H? Thanks

[@awaisahmed2907]

Brother, i got crystalline size different in both methods, what is the reason behind different crystalline size in debye Scherrer and W-H method ? ..thnx

[@nanoworld6122]

off course it will different. Scherer equation is a rough theoretical estimation while W-H plot is more accurate. Because W-H plot separate micro strain from the grain size while this value is embedded is Scherer euation.

[@黃浩喆-x4e]

Thanks a lot for the tutorial, but I got a question to ask: Is it possible to have slope approximate to zero which means that there’s no strain in the material or the stress has been released causing no strain?

[@sankalp3513]

How do you account for instrumental broadening in this equation?

[@nilkanthdevkar]

What if standard data is not available

[@laushenn6054]

help! i have been getting Fit did not converge - mutual dependency exists between parameters error

[@maryamzulfiqar9520]

Respected Sir,. How much variation is acceptable between the calculated value of crystallite size by WH plot method and modified schrrer method?

[@jasiras.v.3698]

did you got the answer? i got 35 nm from scherrer and 120 nm from wh plot..

[@ashwanimaurya206]

thanks sir,,,,,,,,,,

[@nabillebchir8741]

Thank you very much

[@asst.prof.rohitnikam729]

What is meant by linear fit...why polynomial fit is not used

[@fizikchy]

You modify the equation to give you a line. \beta_T vs \theta relation is clearly non-linear. But \beta_T*\cos\theta vs \sin\theta relation is so. Therefore, you firstly create the latter plot, then apply linear fit, which works well.

[@asifasadov3975]

Just Respect

[@김대성-f2n8w]

thanks a lot , but when i calculate crystallites size, i have a problem in the unit value. when i use lamda as unit of Å, that time it was correct to compare to SEM. why?

[@nanoworld6122]

you are probably doing something wrong

[@김대성-f2n8w]

@@nanoworld6122 thanks for your attention.

[@vikashjaiswal5231]

Excellent..

[@nanoworld6122]

Thanks a lot

[@ManSingh-mw1il]

sir, the crystallite size we get from W-H plot is it the average crystallite size?

[@nanoworld6122]

Yes

[@gopalakrishnanvenkata2537]

evry useful. can you please send me the typed derivation shown in the video..thank you

[@nanoworld6122]

Ask it through email

[@ericbu2631]

Many thanks

[@nanoworld6122]

You are welcome

[@rushikesh_here]

i want a pdf file of xrd.

[@dalalalhilfi87]

i need the excel fil

[@TSAjmal]

You are telling βT = FWHM and also βD = FWHM, why?

[@rajeebkumarmalik8808]

yes, I have the same doubt. is it same or what??

[@fizikchy]

\beta_T is the total broadening in this video. In earlier videos he does not take into account \beta_\epsilon, so \beta_D is FWHM there. But here, there are two contributions to FWHM (=\beta_T). In other models there maybe more terms contributiong to FWHM.

[@arimateiaalves3349]

hey man in my xdr data i obtained (Intercept -0,0028 ± 0,00891) is that possible? how can i calculate the crystal size ?

[@nanoworld6122]

There is a lot of explanatory material available on research-gate regarding negative W-H plot.

[@PROFBCRAI]

The unit of fwhm should be radian

[@PROFBCRAI]

Very nice 👍👌

[@ryanrizaldynawawi3404]

nice

[@mohamedleminemohamedou3454]

Thanks can you plz send me the word file

[@sunandobanerjee7665]

your analysis is wrong because adj. R square value should come close to 1 , even at 0.8 to 0.9 is okay. you have to mask certain data points and fit the data, changing scale wont help.