Electroceramics
2221141
184364751
2008-01-14T23:34:53Z
Stan J Klimas
2562403
/* Fast ion conductor ceramics */ -- correct the link to YSZ
While [[ceramic]]s have traditionally been admired for their mechanical and thermal stability, their unique [[electrical]], [[optical]] and [[magnetic]] properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Such materials are now classified under '''Electroceramics''', as distinguished from other functional ceramics such as advanced structural ceramics.
Historically, developments in the various subclasses of '''Electroceramics''' have paralleled the growth of new technologies. Examples include: [[ferroelectricity|Ferroelectrics]] - high dielectric [[capacitor]]s, non-volatile memories; [[Ferrite]]s-data and information storage; Solid Electrolytes - energy storage and conversion; [[Piezoelectric]]s - sonar; Semiconducting Oxides - environmental monitoring. Recent advances in these areas are described in the [http://www.ingentaconnect.com/content/klu/jecr Journal of Electroceramics].
==Dielectric ceramics==
Dielectric materials used for construction of ceramic [[practical capacitors|capacitors]] include [[zirconium barium titanate]], [[strontium titanate]] (ST), [[calcium titanate]] (CT), [[magnesium titanate]] (MT), [[calcium magnesium titanate]] (CMT), [[zinc titanate]] (ZT), [[lanthanum titanate]] (TLT), and [[neodymium titanate]] (TNT), [[barium zirconate]] (BZ), [[calcium zirconate]] (CZ), [[lead magnesium niobate]] (PMN), [[lead zinc niobate]] (PZN), [[lithium niobate]] (LN), [[barium stannate]] (BS), [[calcium stannate]] (CS), [[magnesium aluminium silicate]], [[magnesium silicate]], [[barium tantalate]], [[titanium dioxide]], [[niobium oxide]], [[zirconia]], [[silica]], [[sapphire]], [[beryllium oxide]], and [[zirconium tin titanate]]
Some piezoelectric materials can be used as well; the [[EIA Class 2 dielectric]]s are based on mixtures rich on [[barium titanate]]. In turn, [[EIA Class 1 dielectric]]s contain little or no barium titanate.
==Electronically conductive ceramics==
Indium tin oxide (ITO)
==Fast ion conductor ceramics==
[[Yttria-stabilized zirconia]] (YSZ), gadolinium doped ceria (GDC), lanthanum strontium gallium manganite (LSGM)
==Piezoelectric and ferroelectric ceramics==
Commercially used piezoceramic is primarily [[lead zirconate titanate]] (PZT). [[Barium titanate]] (BT), [[strontium titanate]] (ST), [[quartz]],
and others are also used.
See [[:Category:Piezoelectric materials]].
==Magnetic ceramics==
== References ==
* [http://electroceramics.mit.edu/about.htm The Electroceramics and Crystal Physics Group at MIT]
== See also ==
* [[Ceramic]]
* [[Strontium titanate]]
* [[Barium titanate]]
* [[Lead zirconate titanate]]
[[Category:Materials science]]
[[Category:Ceramic materials]]