C4 Flashcards
(21 cards)
what are ceramics?
inorganic non - metallic solids
what is a composite?
reinforcement and the matrix
what is a property of a material?
tensile,hardness,flexibility,elelectricial conductivity, thermal conductivity
one fact about giant covelant structure
no specific formula,high melting point,large molecule
what is a diamond structure
an allotrope of carbon
whats the functions of diamond structure
covalent bonds, hard,does not conduct electricity, high melting point
what is graphite
an alltrope of carbon
whats the properties of graphite
covalent bonds, soft, conducts electricity
what is graphene
a allotrope of carbon
what are the properties of graphene
conduct electricity, light but strong
what is fullerenes
molecules of carbon atoms that have hollow shapes
what is a spherical fullerenes
the 1st fullerene was spherical its formula of C60 a simple molecule
what is the uses of spherical fullerenes
catalysts, lubricants, delivering drugs
what is cylindrical fullernes
tiny diameter but very long carbon nanotubes
what are cylindrical fullerenes uses
electrical conductivity of them make it useful in electronics and nanotechnology
what are nanoparticles?
1-100nm long
10-1000 atpms
what are fine particles
100-2500nm long
1000 25000 atoms
uses of nanoparticles
catalysts medicine electronics cosmetics deodorants
what are nanoparticles
high syrface to volume ratio that smaller amounts can be used for our desired purpose
disadvantage of nanoparticles
we dont know the long term effect it has on human health
what is a lca life cycle assessment
access every stage of a product lifetime to evaluate total enviromental costs
