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How to calculate Cp of High entropy ceramics composites

Posted: Sun Jun 26, 2022 9:40 pm
by Faisal Nazeer
Hi All, I am confused How to calculate specific heat capacity (Cp) of High entropy ceramics composites by using neuman-kopp method? is any one know please let me know? thanks in advance

Re: How to calculate Cp of High entropy ceramics composites

Posted: Mon Jun 27, 2022 4:20 am
by ChenBeier
You need the specific heat capacity of each component in your ceramic and the mass fraction of each component.
The Neumann Kopp law is here

https://en.m.wikipedia.org/wiki/Kopp%27s_law

Re: How to calculate Cp of High entropy ceramics composites

Posted: Mon Jun 27, 2022 4:29 am
by Faisal Nazeer
I used the method whixh you mentioned but the results are not accurate much difference

Re: How to calculate Cp of High entropy ceramics composites

Posted: Mon Jun 27, 2022 4:35 am
by ChenBeier
The method is valid at 25°C, at other temperature it differs.
Get the right mass fraction? What kind of Oxides you have?

Re: How to calculate Cp of High entropy ceramics composites

Posted: Mon Jun 27, 2022 4:44 am
by Faisal Nazeer
I am using high entropy ceramic mono and disilicates , even at room temperature the values different which are already mentioned in the literature, so don't know what's wrong with the calculation
Er2O3+Tm2O3+Sc2O3+Yb2O3+8SiO2=4(Er0.25Tm0.25Sc0.25Yb0.2)2Si2O7
For Cp using equation
O.25Cp(Er2O3)+0.25Cp(Tm2O3).......+SiO2

Re: How to calculate Cp of High entropy ceramics composites

Posted: Mon Jun 27, 2022 7:44 am
by ChenBeier
I dont see calculation for mass fraction. You used mole fraction, do you?
Take maybe 1 g of the ceramic and calculate the grams of each oxide by using molar mass.

How to calculate the density of high entropy ceramics composites?

Posted: Mon Jun 27, 2022 8:59 pm
by Faisal Nazeer
Hi all,
I want to know how we can calculate the density of high entropy ceramics composites?
unit cell mass and unit cell volume of high entropy ceramics ?