Density Computation For Ceramics

It is possible to access the bulk density of a porous ceramic sample by the archimedes method either by immersing a coated sample in a wetting liquid.

Density computation for ceramics.

Materials science problem that calculates the number of chemical sio2 units per unit cell of silicon dioxide. Lectures 22 and 23 introduction to ceramics ceramic density calculations example. Ceramic density computation a c a v n n a a c σ σ ρ number of formula units unit cell volume of unit cell n number of cations in unit cell ac atomic weight of cation na number of anions in unit cell aa atomic weight of anion vc volume of unit cell na avogadro s number. Density calculations in ceramic structures c a c a v n n a a ρ n number of formula units in unit cell all ions that are included in the chemical formula of the compound formula unit σσσσac sum of atomic weights of cationsin the formula unit σσσσaa sum of atomic weights of anions in the formula unit vc volume of the unit cell.

The calculation of density is quite straightforward. Mole sc2o3 0 92 mole hfo2 1 03 mole ceo2 1 4. We use the equation c a fe o c a c a v n n a a v n n a a ρ since the crystal structure is rock salt n 4 formula units per unit cell and. Calculate the density of feo given that it has the rock salt crystal structure.

However it is important to pay special attention to the units used for density calculations. Or by immersing the uncoated sample in a non. Zm nv where z is the number of atom per unit. Mass properties e g density ceramics are intermediate density 2 00 6 00 gms cm3 different for allotropes e g glass cristobalite tridymite quartz 2.

First you shall have to determine the bulk density using the formula. This problem features the density formula for ceramics. To compute for theoretical density of ceramics five essential parameters are needed and these parameters are number of formula units in unit cell n sum of atomic weights of atoms σa c sum of atomic weights of anions σa a unit cell volume v c and avogadro s number n a. The theoretical density of the materials of the anode cathode and electrolyte are used to calculate the porosity of the materials a critical parameter in determining if the fuel cell will function properly.

Mass volume and then determine the theoretical density from xrd data using.