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October 18th, 2005
07:40 am

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Roddenberry and Heinlein
Star Trek: http://www.answers.com/topic/transparent-aluminum

USAF: http://www.af.mil/news/story.asp?id=123012131

It's not clear to me whether ALONtm is a mere variant on the "alumina" referred to in the answers.com article, or is actually something new. "Aluminum Oxynitrite" sounds a lot like "Aluminum Oxide" to me--maybe a chemist in the room can help me out.

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From:niobecyane
Date:October 18th, 2005 12:51 pm (UTC)
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The article gives the formula of aluminum oxynitride as AlON (that's one aluminum, one oxygen, and one nitrogen) and the formula of aluminum oxide is Al2O3, so these are in fact different molecules.
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From:happypete
Date:October 18th, 2005 01:13 pm (UTC)

hrm...

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I found the patent for AlON which is variously referred to as ALON (all caps) as a trademark or registered trademark, respectively...

It refers back to several reference documents, includung references to research on Al2O3...

Yep, it looks like something new under the sun...apparently the trick is not just the formulation, but also the post-treatment polishing.
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From:niobecyane
Date:October 18th, 2005 01:22 pm (UTC)

Re: hrm...

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You are correct...the fact that the chemical is patented should have tipped me off that ALON is not a structural formula but brand name. So I couldn't tell you what it actually is as I'm sure that information is proprietary.
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From:amylgam
Date:October 18th, 2005 03:48 pm (UTC)
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From:amylgam
Date:October 18th, 2005 03:57 pm (UTC)
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In other words, it is Al(64+x)/3O32-xNx, 2.75<x<5
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From:happypete
Date:October 18th, 2005 10:09 pm (UTC)

Wow...

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Formulas like that are why I largely stopped doing chemistry after High School...
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From:happypete
Date:October 18th, 2005 10:15 pm (UTC)

Is that formula only valid

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when the "x"'s result in integral, positive values, i.e.

where x is in 2, 5, 8, ..., 29?

What does the ", 2.75" mean?
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From:amylgam
Date:October 18th, 2005 10:17 pm (UTC)

Re: Is that formula only valid

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The automatic HTML formatting ate the rest of it. X has to be between 2.75 and 5. I tried to write it using brackets. Bad idea, I guess.
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From:happypete
Date:October 18th, 2005 11:41 pm (UTC)

Re: Is that formula only valid

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How do the fractional numbers work? Do you have to multiply everything by some value until all the value are integral?

Confusing.
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From:dcseain
Date:October 18th, 2005 03:52 pm (UTC)
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It appears to me that ALON is a variant on transparent alumina, bonded with a ceramic compoundp
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