Talk:Ceramic

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Basic definition

In the opening sentence, ceramics are described as being "made by shaping and then firing an inorganic, nonmetallic material", but then later, some metallic ceramics are mentioned. Also, some of the advanced ceramics which are mentioned later in the article are not made by shaping and firing the material. In the source for the opening sentence, it says this definition is "strictu sensu" (sic), so this seems too narrow a definition, considering the context of the source and the broader definition used both there and in the rest of this article. 82.3.113.43 (talk) 16:40, 8 March 2024 (UTC)

Well, the article doesn't really mention any metallic ceramics that I can tell. Many ceramics are made from metal compounds such as metal-oxides, nitrides, or carbides, but the fact that they contain metals does not make them metallic, that is, they don't behave as metals. For example, aluminum oxide is the main compound found in rubies and sapphires, but are transparent, hard and brittle, and electrically insulating. The article does mention composite ceramics that contain metallic matrices, but that's really no different from a composite plastic that contains metallic reinforcing fibers that serve the same purpose as rebar in concrete. When most people think of ceramic they think of earthware made of clays, but they can be made of almost any non-organic, nonmetallic material. The main thing that separates it from, say, concrete or porcelain is all ceramics are made by sintering the material together without fully melting it, leaving it somewhat porous, whereas concrete is made by a chemical reaction and porcelain is fully melted during firing, turning it into a non-porous glass. Zaereth (talk) 20:46, 11 March 2024 (UTC)

Inclomplete sentence in "Properties > Optical properties"

I would edit the sentence if I knew what the missing part was meant to be.

Barium titanate: (often mixed with strontium titanate) displays ferroelectricity, meaning that its mechanical, electrical, and thermal responses are c YASYASHACKER (talk) 12:46, 27 January 2025 (UTC)

Restored to: "#Barium titanate: (often mixed with strontium titanate) displays ferroelectricity, meaning that its mechanical, electrical, and thermal responses are coupled to one another and also history-dependent. It is widely used in electromechanical transducers, ceramic capacitors, and data storage elements. Grain boundary conditions can create PTC effects in heating elements."

- as usual in such cases, the original can be found in old versions, though I had to go back to the last one in 2020. Johnbod (talk) 19:58, 27 January 2025 (UTC)

Ceramic Car Wax Products?

What’s the deal with all these car care products calling themselves “ceramic”? Seems like a new thing and seems like marketing BS. I tried asking a car detailing forum what the scoop is and boy did they not like that one bit. The other day I saw someone mention “ceramic [window] tint” which is just as unbelievable. Anyone out there have the full story on this new trend? Not sure where else to ask this :/ – ⓣⓡⓢ⑨ⓚ 03:41, 25 August 2025 (UTC)