MTL 200 EXAM 3 QUESTIONS AND
100% CORRECT ANSWERS!!
What is the role of network modifiers and intermediates?
To reduce the melting point and viscosity
Two types of silicates
Simple Silicates (Fosterite, Mg2SiO4)
Layered Silicates
Silicates
Materials composed of mainly Si and O
e.g. soils, rocks, clays and sands
What is - SiO4 4-
silicon-oxygen) tetrahedron
a basic unit of silicate as a negatively charged entity
, Silica
the most simple silicate material
What are the three primary polymorphic crystalline forms?
1) Quartz
2) Cristobalite
3) Tridymite
Equation for ceramic Density
p=
n'( sum of(A_c) + sum-of(A_A)
/
(V_c*N_A)
n’ = the number of formula units within the unit cell sum-
of (A_c) = the sum of atomic weights of all cations
Sum of(A_A) = sum of
of all anions
Vc = the unit cell volume
NA = Avogadro’s number
Factors that affect ceramic structures
100% CORRECT ANSWERS!!
What is the role of network modifiers and intermediates?
To reduce the melting point and viscosity
Two types of silicates
Simple Silicates (Fosterite, Mg2SiO4)
Layered Silicates
Silicates
Materials composed of mainly Si and O
e.g. soils, rocks, clays and sands
What is - SiO4 4-
silicon-oxygen) tetrahedron
a basic unit of silicate as a negatively charged entity
, Silica
the most simple silicate material
What are the three primary polymorphic crystalline forms?
1) Quartz
2) Cristobalite
3) Tridymite
Equation for ceramic Density
p=
n'( sum of(A_c) + sum-of(A_A)
/
(V_c*N_A)
n’ = the number of formula units within the unit cell sum-
of (A_c) = the sum of atomic weights of all cations
Sum of(A_A) = sum of
of all anions
Vc = the unit cell volume
NA = Avogadro’s number
Factors that affect ceramic structures
