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Post by satamax on Nov 17, 2018 11:36:08 GMT -8
Pretty much. Remember that glass and steel don't expand at the same rate. So, when cold, steel shouldn't be too tight, and not too loose when hot!  |
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Post by coastalrocketeer on Nov 17, 2018 13:02:46 GMT -8
Yes... AFAIK...
Advice I've seen given by others:
Don't clampt too tightly, and make sure there is expansion room around the edges of the glass to allow for differing expansion of steel and ceramiglass...
Weird... Max's post didn't show up before I hit post on this... He add's the additional info to not make the the space too big, as the streel will expand more than the neo-ceram.
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Post by invention1 on Nov 17, 2018 16:59:23 GMT -8
Yes... AFAIK... Advice I've seen given by others: Don't clampt too tightly, and make sure there is expansion room around the edges of the glass to allow for differing expansion of steel and ceramiglass...
I suppose if it leaks a little around the glass, in the grand scheme of things that won't affect the operation of the stove much, esp. since I intend for these to be small windows. On my current old-time fisher stove all I can see is a glint of flame through the air inlets. But I sooo want to see the dragon-mouth at the top of the riser!
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Post by coastalrocketeer on Nov 17, 2018 18:55:55 GMT -8
If it has a compressible glass rope or tape gasket against a flat surface it should seal nicely, without a large amount of presssure squeezing the glass.
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Post by smokeout on Nov 22, 2018 22:47:45 GMT -8
I recently installed glass in my door. If I remember I got it from Granger for 48$ 5/8"x 8"x8" . The glass stays right at 700f checking it with the infrared sensor. I picked up some 3M copper high temp sealant and to my surprise it has held up so far, I believe it's upper limit is 700F
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Post by permaculturebob on Dec 6, 2018 16:19:03 GMT -8
Seems like I saw a statement by someone on one of these forums that the glass in the doors of microwave ovens is pyroceram ( I think neoceram is also one of the other trade names for it.
When I did a search to try and verify it I could not find any definite answer.
I have a microwave I'm taking apart now, and I'm tempted to just throw it into a bonfire to burn off all the plastic attached to it. I did notice a part number on the door , and later I'll search for it, maybe call the parts dept and see if I can get more specific info.
I also have a couple insulated glass panels out of oven doors, but since those temps don't go beyond 600 I guess they are borosilicate
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Post by drooster on Dec 7, 2018 10:22:41 GMT -8
Seems like I saw a statement by someone on one of these forums that the glass in the doors of microwave ovens is pyroceram ( I think neoceram is also one of the other trade names for it. When I did a search to try and verify it I could not find any definite answer. I have a microwave I'm taking apart now, and I'm tempted to just throw it into a bonfire to burn off all the plastic attached to it. I did notice a part number on the door , and later I'll search for it, maybe call the parts dept and see if I can get more specific info. I also have a couple insulated glass panels out of oven doors, but since those temps don't go beyond 600 I guess they are borosilicate Old dead microwaves are easy to get, easier than dead glass-hobbed ovens ... *strokes beard* |
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Post by Dan (Upstate NY, USA) on Dec 7, 2018 15:38:59 GMT -8
What?!? I can't imagine microwaves use expensive glass in the doors.
My microwaves have never gotten hot in the glass on the doors.
That metal screen keeps the microwaves from "leaking" which keeps the door glass cool...
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Post by josephcrawley on Dec 7, 2018 15:49:36 GMT -8
The microwave industry uses "Heat Strengthened Glass" for glass doors. This is a heat treatment process the glass is put through that allows it to withstand a certain amount of impact.
Here's a quote from an appliance parts place. I doubt it is neoceram.
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Post by wiscojames on Dec 7, 2018 15:55:43 GMT -8
When I tap on either side of mine, they both sound more like plastic than glass. One sure way to find out is to throw a pile of them in to your bonfire pit. Let us know!
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Post by wiscojames on Dec 7, 2018 15:56:44 GMT -8
Though it doesn't seem in line with the ideals of permaculture...
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Post by permaculturebob on Dec 7, 2018 19:12:57 GMT -8
I got the door apart down to some plastic trim and the glass itself. The glass is just a little thicker than 1/8, maybe-- and everything seems so cheap, I'm having trouble believing it could be neoceram, and I did verify that is a trade name for pyroceram. I'm guessing the "heat strengthened" glass is likely not as robust as that. I've sort of put that on the back burner anyway, but when I get a chance I may try and cut it away from as much plastic as possible. Haven't really had a bonfire in ages, all my wood goes into hugel beds.
Heat strengthened sounds a lot like tempered, and I have a double pane oven glass insert that I could try that is likely tempered, and it could be used as is.
Oh, I'm using a visions cookware pot lid, and tonight it cracked, bumping the hot lid against a cold brick I'm not sure if it was the jolt or temperature differential that did it. I used a borosilicate pot lid last year that did sort of explode , then I got a visions fry pan, which lasted a couple months, still ok, but too big for this project. The long handle stays cool, but the pot lid needs an oven mitt after it gets hot. |
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Post by Vortex on Dec 8, 2018 1:21:29 GMT -8
Borosilicate is rated at 500*C. I used them for years on my first vortex stove. They would last about 18 months on average. If you touch them with something cold when they're hot they break.
Microwave door glass suppliers list them as toughened or tempered glass. Whereas the trays inside that spin around are listed as borosilicate.
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Post by Vortex on Dec 8, 2018 2:36:27 GMT -8
Robax and Pyroceram are also not immune to the effects of direct flame. I have a piece of each and they have both shown degradation within 6 weeks of regular use where the flame is in direct contact with the glass.  |
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Post by drooster on Dec 8, 2018 12:00:22 GMT -8
When I tap on either side of mine, they both sound more like plastic than glass. One sure way to find out is to throw a pile of them in to your bonfire pit. Let us know! The funny thing is, that's what modern stove window glass sounds like when you tap it ... |
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