Density Computation For Ceramics

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

Density computation for ceramics.

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. 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. Melting points high 600 4000c thermal conductivities are low insulators thermal expansion values are low 1 15 ppm c 3. Materials science problem that calculates the number of chemical sio2 units per unit cell of silicon dioxide.

The calculation of density is quite straightforward. Calculate the density of feo given that it has the rock salt crystal structure. 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. There are many different ways to express density and not using or converting into the proper units will result in an incorrect value.

This problem features the density formula for ceramics. However it is important to pay special attention to the units used for density calculations. 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 volume and then determine the theoretical density from xrd data using. Mole tio2 86 58 mole zro2. First you shall have to determine the bulk density using the formula. 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.

Lectures 22 and 23 introduction to ceramics ceramic density calculations example.