[archo]

  'Pyrex cookware breaks in the microwave'

>4) My microwave uses a glass turntable. Why doesn't it shatter?

Where does the thermal shock come from between the glass container and the glass turntable?

If the thermal shock is between those two, then surely your more worried the glass would shatter,

if you take it out of the microwave oven and put it on a metal countertop, yes? <-No, not in two cases,

splits in half inside microwave while sitting on the platen (glass turntable).

The platen glass is doped with a microwave absorbance metal to provide some protection to the magnetron.

[eesmith]

> Pyrex cookware breaks in the microwave

Pyrex cookware can break in the microwave. So can glass cookware from other brands.

These incidents are RARE.

Your original claim is that they are "likely." This is wrong. Your new claim is that it "breaks in the microwave". Leaving out a qualifier implies it is inevitable and common. That interpretation is clearly wrong given the hundreds of millions if not billions of such glassware in use.

"Pyrex" is a brand name. You need to be specific. Do you mean Pyrex soda lime glass, Pyrex borosilicate glass, or both?

Why do you not care about non-Pyrex brand glassware?

> The platen glass is doped with a microwave absorbance metal to provide some protection to the magnetron

I am not able to verify this claim. As best I can tell, I was wrong - borosilicate glass is most often used, not lime soda. See https://patents.google.com/patent/JP2013063861A/en ("As the glass used for the turntable, borosilicate glass having a low thermal expansion coefficient and excellent thermal shock resistance is used.")

While boron is a metalloid (not a metal), it is not chosen for microwave absorbance reasons.

I do not believe your claim is true because "microwave absorbance metal" means the glass will heat up faster than otherwise, which is not what you want.

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My 1.75QT - 1.65L Pyrex cookware is made in the USA.

>Your original claim is that they are "likely." This is wrong.

^Please^ carefully re-read my comments, no where did I profess; "likely." < Are you confusing the video content with me?

>The platen glass is doped with a microwave absorbance metal to provide some protection to the magnetron.

^ IS correct ^, the fact that you; not believe your claim is true because "microwave absorbance metal"

means the glass will heat up faster < Simply means you do not know, run you microwave empty for 60sec (NOT recomended)

feel the platen, it is hotter than ambient temperature, microwave energy has been absorbed across the large surface area.

[eesmith]

You wrote now "no where did I profess; "likely.""

Your original text contained this line: "The above is why Pyrex cookware is likely to crack and split in microwave cooking". I've emphasized where you wrote "likely", which you can verify at https://news.ycombinator.com/item?id=36839086 .

Your Pyrex cookware is NOT likely to crack in split in microwave cooking, as I earlier stated at https://news.ycombinator.com/item?id=36839452 .

> it is hotter than ambient temperature, microwave energy has been absorbed across the large surface area.

Sure. Agreed. That's why I wrote "the glass will heat up faster than otherwise" with emphasis added to show how I know the glass will heat up no matter its composition.

Put your 1.75QT - 1.65L Pyrex cookware in the microwave, by itself, and it will also heat up. That's not a sign that there is some special additive.

You think the glass turntable contains a metal additive which absorbs energy. This means it will get hotter than glass without the additive. Where is your evidence that it is designed this way?

[archo]

>Where is your evidence that it is designed this way? < You can find the reference that the platen forms a dummy-load.

I could explain to you how and why this happens,

but I doubt you would " believe ", even if the facts are placed in front of your face.

Hence further dialog is moot.

[eesmith]

Boring bluster.

I link to my citations, including to the patent literature, and you ... have nothing to back you up.