Ceramic and porcelain insulators are used in conjunction with wires that may generate a large amount of heat. Ceramics have a very high heat tolerance, especially higher than plastic and some metals.
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ceramic square- used under hot apparatus or glassware
Ceramic dinnerware can be used on many occasions. Often, people use ceramic dinnerware when they are eating with an important person, like a politician.
Ceramic foam filter is the refractory ceramic material. It is used for filtration of molten metal,gas,water and so on.
http://en.wikipedia.org/wiki/Meissen_porcelain
These are Ceramic tiles enfused with silica sand (The sand used to make glass).