Talk:Glass-ceramic

message: Info from the de:-Wikipedia. I'm not an expert on glass-ceramic and I am confused a bit: if glass-ceramic has such a low heat conduction coefficient, why does the plate get hot at all? Is it the infrared radiation heating the pot, which then heats the surface? How does this thing work? Lupo 12:15, 28 Jun 2004 (UTC)
replies: text: So you're saying that the plate gets hot because of this 15-20% absorbtion of infrared radiation emitted by the burner? Plus maybe by the hot pot above? And the pot itself is heated primarily by the other 80-85% going through the glass-ceramic? Hmmm... the plates get really hot, even if there is no pot on them. (In the first type, using a burner, not in an induction stove.) Time to e-mail Schott? Lupo 07:54, 6 Oct 2004 (UTC)
thread_title: Untitled

message: Some day, I'll come back and add some info about Corningware, the best-known US brand of glass-ceramic materials.  The article should also mention vaseline glass.
On to induction ranges: these actually work by hysteresis losses (the current article is wrong about this, btw), also a source of inefficiency in transformer cores.  What ultimately heats the food is the energy dissipated when a ferromagnetic pot (austenitic stainless steel, copper, aluminum, and glass pans don't work on iduction ranges unless they're built with a ferritic steel insert) is magnetized in one direction, then the other, 50 to 60 times a second (usually 50 Hz, since they're more popular in Europe).  If the coil heats up without any pot on it, chances are very good that your cooktop is of the type with halogen lamps or ohmic heating elements underneath, that work like an Easy-Bake Oven or a normal electric range, respectively.  If it glows white, it's halogen; red (only on high heat), and it's a normal heating element that heats the ceramic by conduction.  Keep in mind how much thinner a plate is top-to-bottom as opposed to side-to-side.--Joel 23:14, 17 Jun 2005 (UTC)
thread_title:  Induction ranges & corningware: clearing up some confusion 

message: Hi! Sorry, I am new at wikipedia and I just came across the glass-ceramic (gc) article, which is, I am afraid, in some parts quite wrong. However, I am not familiar enough with wiki (I will try to become :) to change it. But some general remarks: ß-spodumen is NOT the major phase in gc. (I suppose you are speaking of the LAS-System, which is only ONE gc system) Exactly speaking there is even no so called ß-spodumen but keatite solid solution. And this keatite s.s. is only existing in gc's which are translucent or opaque, which is the minor amount of gc's used today. For the LAS-System (Li-Al-Si) which is the most used one today, ß-Eucryptite is the major phase. This gc's are transparent and used in cooktops and telescopes, and projectors. If this gc is heated up above ca. 900°C for some time, the ß-Eucryptite changes to ß-keatite (or wrongly saying ß-spodumene). But in general, this phase transformation is NOT wanted (just in some special cases)
BUT also: There are many other Gc's systems which are e.g. MAS (Mg-Al-Si-System), Phlogopit, ZAs (Zn-...), Lithium-Disilikate, ...
There are some other points which are not really good, but I am afraid to change them. Any suggestions?
Best regards Lagodefroy (talk) 14:21, 24 June 2009 (UTC)
thread_title:  General remarks 

message: Hi all,
ok, nobody complained about my remarks about the errors, so now I wil try to correct the page step by step. As I said, I am new with wiki and unfortunetly I do not have so much time as I want to. Please lets discuss if there is anything you do not agree with!
I made a lot of changes and rewrote the article carefully. However, I am no native English speaker, so please advice here. In addition, the part about the stoves does not fit in my opinion, however I did not delete it. Please advice again.
Lagodefroy (talk) 14:39, 12 January 2010 (UTC)
thread_title:  Changes to page 

message: Why "so called nucleation agents"? The wording seems to imply that the additives are not nucleation agents, although they are so called. Because if they were nucleation agents, they'd simply be called "nucleation agents", not "so-called nucleation agents". 
-- Wegesrand (talk) 14:32, 6 January 2011 (UTC)
thread_title:  "so called nucleation agents" 

message: I think a new section about the history of glass-ceramics would improve the quality of this page significantly. The initial discovery of glass-ceramics was an accident. Stanley Donald Stookey was performing an experiment in which his furnace malfunctioned and heated his glass sample to a much higher temperature than intended. He found that the resulting material had much different properties than the initial glass and the original ceramics that it was composed of. This discovery lead to the rapid development of CorningWare and other glass-ceramic materials in the following years. I don't have enough time right now to provide any citations, but I plan on doing so in the near future. --Demxr2 (talk) 16:40, 25 September 2020 (UTC)
thread_title:  History of Glass Ceramics 

message: I am going to add new sections on the Nucleation and Growth processes and also Medical Applications of Glass-Ceramics because both of these are extremely relevant to the topics. Demxr2 (talk) 17:21, 6 November 2020 (UTC)
thread_title: Adding New Sections

message: Hi all, I have uploaded a new photo of a glass-ceramic cooktop. I would like to suggest that we could use it to replace the current photo, which is almost 20 years old. Let me know what you think!  Elisabeth at SCHOTT (talk) 11:55, 18 April 2024 (UTC)
replies: text: I've updated the photo in the article. Hope that works for you all! Elisabeth at SCHOTT (talk) 09:37, 4 June 2024 (UTC)
thread_title:  New cooktop photo