## How to calculate Cp of High entropy ceramics composites

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Faisal Nazeer
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Posts: 4
Joined: Sun Jun 26, 2022 9:27 pm

### How to calculate Cp of High entropy ceramics composites

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
ChenBeier
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Location: Berlin, Germany

### Re: How to calculate Cp of High entropy ceramics composites

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
Faisal Nazeer
Newbie
Posts: 4
Joined: Sun Jun 26, 2022 9:27 pm

### Re: How to calculate Cp of High entropy ceramics composites

I used the method whixh you mentioned but the results are not accurate much difference
ChenBeier
Distinguished Member
Posts: 1204
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: How to calculate Cp of High entropy ceramics composites

The method is valid at 25°C, at other temperature it differs.
Get the right mass fraction? What kind of Oxides you have?
Faisal Nazeer
Newbie
Posts: 4
Joined: Sun Jun 26, 2022 9:27 pm

### Re: How to calculate Cp of High entropy ceramics composites

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
ChenBeier
Distinguished Member
Posts: 1204
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: How to calculate Cp of High entropy ceramics composites

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.
Faisal Nazeer
Newbie
Posts: 4
Joined: Sun Jun 26, 2022 9:27 pm

### How to calculate the density of high entropy ceramics composites?

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 ?