Density Computation For Ceramics

This problem features the density formula for ceramics.

Density computation for ceramics.

Zm nv where z is the number of atom per unit. 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. Mole tio2 86 58 mole zro2. Materials science problem that calculates the number of chemical sio2 units per unit cell of silicon dioxide.

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. Melting points high 600 4000c thermal conductivities are low insulators thermal expansion values are low 1 15 ppm c 3. First you shall have to determine the bulk density using the formula. However it is important to pay special attention to the units used for density calculations.

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 calculation of density is quite straightforward. Mass volume and then determine the theoretical density from xrd data using. 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.

Or by immersing the uncoated sample in a non. 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. There are many different ways to express density and not using or converting into the proper units will result in an incorrect value. Calculate the density of feo given that it has the rock salt crystal structure.

Mole sc2o3 0 92 mole hfo2 1 03 mole ceo2 1 4.