Application Of Ceramics Flashcards
noncrystalline silicates containing other oxides, notably CaO, Na2O, K2O, and Al2O3, which influence the glass properties
Glass
2 prime assets of ceramics
Optical transparency
Easily fabricated
Transform od inorganic glasses from noncrystalline state into crystalline by proper high temperature techniques
Crystallization
often added to the glass to promote crystallization
Nucleating agent
Frequent nucleating agent
Titanium oxide
Widely use raw material in ceramics
Clay
Classification of clay based products
Structural clay products
Whiteware ceramics
become white after the high-temperature firing
Whiteware
applications in which structural integrity is important
Structural clay products
capacity to withstand high temperatures without melting or decomposing and the capacity to remain unreactive and inert when exposed to severe environments
Refactory ceramics
Classification of refactory ceramics
Fireclay refactory
Silicon refactory
Basic refactory
Special refactory
used principally in furnace construction, to confine hot atmospheres, and to thermally insulate structural members from excessive temperatures
Fireclay bricks
Prime ingredient of silica refactory
Silica
refractories that are rich in periclase, or magnesia (MgO)
Basic refractories
especially resistant to attack by slags containing high concentrations of MgO and CaO and find extensive use in some steel-making open hearth furnaces
Basic refractory
high-purity oxide materials, which may be produced with very little porosity
Special refactory
used for electrical resistance heating elements, as a crucible material, and in internal furnace components
Silicon carbide
used to wear, grind, or cut away other material, which necessarily is softer
Abrasive ceramics
Common ceramic abrasive
Silicon carbide
Tungsten carbide
Aluminum oxide
Silica sand
those in which an abrasive powder is coated on some type of paper or cloth material
Coated ceramics
Common example of coated ceramic
Sandpaper
used in loose form over a variety of grain size ranges
Loose abrasive
when mixed with water, they form a paste that subsequently sets and hardens
Cement
act as a bonding phase that chemically binds particulate aggregates into a single cohesive structure
Cement
consumed in the largest tonnages
Portland cement
Produced using calcination
Portland cement
Principal constituents of Portland cement
Tricalcium silicate and dicalcium silicate
hydraulic cement because its hardness develops by chemical reactions with water
Portland cement
is the hardest—as a result of its extremely strong interatomic sp3 bonds
Diamond