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tech / sci.electronics.design / Re: OT; Thermally stable -452 to 2059 °F

SubjectAuthor
* OT; Thermally stable -452 to 2059 °Famdx
+- Re: OT; Thermally stable -452 to 2059 °FPhil Hobbs
`- Re: OT; Thermally stable -452 to 2059 °Fwhit3rd

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OT; Thermally stable -452 to 2059 °F

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From: amd...@knology.net (amdx)
Newsgroups: sci.electronics.design
Subject: OT;_Thermally_stable_-452_to_2059_°F
Date: Fri, 18 Jun 2021 11:26:38 -0500
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 by: amdx - Fri, 18 Jun 2021 16:26 UTC

Thought some may see this as interesting.

"This new zero thermal expansion (ZTE) material made of scandium,
aluminum, tungsten and oxygen

did not change in volume at temperatures ranging from 4 to 1,400 Kelvin
(-269 to 1126 °C, -452 to 2059 °F)."

Sc_1.5 Al_0.5 W_3 O_12  :-)

> https://newatlas.com/materials/thermally-stable-zte-advanced-material/
> <https://newatlas.com/materials/thermally-stable-zte-advanced-material/>

                             Mikek

--
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Re: OT; Thermally stable -452 to 2059 °F

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
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 by: Phil Hobbs - Fri, 18 Jun 2021 19:46 UTC

amdx wrote:
> Thought some may see this as interesting.
>
> "This new zero thermal expansion (ZTE) material made of scandium,
> aluminum, tungsten and oxygen
>
> did not change in volume at temperatures ranging from 4 to 1,400 Kelvin
> (-269 to 1126 °C, -452 to 2059 °F)."
>
> Sc_1.5 Al_0.5 W_3 O_12  :-)
>
>> https://newatlas.com/materials/thermally-stable-zte-advanced-material/
>> <https://newatlas.com/materials/thermally-stable-zte-advanced-material/>
>
>                              Mikek
>
>
Scandium is $$$, but if there's a suitable substitute this could come in
very handy.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

Re: OT; Thermally stable -452 to 2059 °F

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Subject: Re:_OT;_Thermally_stable_-452_to_2059_°F
From: whit...@gmail.com (whit3rd)
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 by: whit3rd - Fri, 18 Jun 2021 22:07 UTC

On Friday, June 18, 2021 at 9:26:44 AM UTC-7, amdx wrote:
> Thought some may see this as interesting.
>
> "This new zero thermal expansion (ZTE) material made of scandium,
> aluminum, tungsten and oxygen
>
> did not change in volume at temperatures ranging from 4 to 1,400 Kelvin
> (-269 to 1126 °C, -452 to 2059 °F)."
>
> > <https://newatlas.com/materials/thermally-stable-zte-advanced-material/>

This IS rather interesting; like the researchers, I'm puzzled as to the large range of the effect;
conventional wisdom (Debye or Einstein model) says the crystal structure and/or
chemical bonding has to be changing somehow even though the volume doesn't.

Invar, which has a smaller range of near-zero thermal expansion, has a magnetic transition
causing the low-expansivity effect.

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