Of course by definition vitrification involves melting. But nobody but you is talking about vitrification.
Not all pottery is vitrified. Some are sintered. Sintering is not unique to sparkplug ceramics. And the glaze on a sparkplug is vitrification. So saying "not vitrified" is not a completely accurate description of a sparkplug ceramic.
when you talk about pottery, you're talking about vitrification. but you don't know that because, despite the fact that i keep giving you the correct language that you could use to look up and educate yourself, you keep refusing to do use it to do so.
unlike a technical ceramic, no pottery is monophase. all pottery is multiphase, and that means [at least partial] vitrification.
no, they're vitrified.
indeed. there are many sintered monophase technical ceramics.
no, it's "glazing". that's why it's called "glazing", not "vitrification". it's a separate layer totally distinct from the rest of the material. just like that colored layer on the exterior of your car is not called "metal".
right, there's a special technical name for it - one that's used in the technical community that develops and works with technical ceramics and solid state diffusion: that special name is "sintered".
but at this stage, the last thing you're interested in is learning what's right, you're just here to argue.
You are apparently unaware that there are numerous methods for making pottery.
There is nothing particularly high-tech about sintering. A common example is when you leave a bag of ice cubes in the freezer and the ice cubes get stuck together. There is no liquid phase involved the ice cubes get stuck together by solid state diffusion.
Some types of pottery are made by sintering. The firing temperature is well above the melting point of any of the ingredients.
There no melting or liquid phase involved the particles are stuck together by solid state diffusion. This happens to be the most primitive form of making pottery Primitive pottery making didn't have hot enough fires to make vitrified pottery.
It is called vitrification by knowledgeable people. Most vitrification in pottery is accomplished by glassification of silica. Silica happens to also be the most common ingredient of glaze.
No that is often not true. The glaze will penetrate. Some types of pottery are first sintered and cooled, then dipped in glaze and the glaze is absorbed into the porous sintered pottery. Then it is fired again and it is only in the second firing that vitrification occurs due to the glassification of the glaze that fills the pores.
There is nothing special or even new about the name. Sintering as a process for making pottery has been around for centuries.
According to the dictionary the word sinter is defined as: to cause to become a coherent mass by heating without melting
And it has been used since the 1870's
you don't know what you don't know. that's not a problem. and acting teachable is not a real problem either. but persistence ignorance and unteachability as some kind of badge of honor? i can only guess you find it amusing because i can't see any other reason for it.
That should have been " below the melting point"
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