Talk:Aluminium oxynitride

".50 BMG" misleading?

The cited article doesn't specify .50 BMG, only 50 caliber, which could be something like .50 AE or other lighter loads. We should also probably have something in there that it's a laminate *containing* Aluminum Oxynitride, and what kind of thickness we're talking about, because everything is bulletproof if you pile up enough of it. Much of that section of the article seems to be from marketing rather than scientific sources. — Preceding unsigned comment added by 24.148.35.9 (talk) 16:52, 12 August 2024 (UTC)

patent

The patent and data sheet have been added to the article. It would be wonderful if someone fluent in patentese could sift through these to get accurate information in the summary table. --Eponymous Coward 00:55, 30 October 2005 (UTC)

I discarded the old chemical formula

Based on the correspondence principle, in the formula Al_(64+x)/3O_32-xN_x (2.75 ≤ x ≤ 5) if we set x=0, we should get Al₂O₃, but instead we get Al₆₄O₃₂, equivalent to Al₂O. This is wrong, however the increment part, 1/3rd extra aluminum needed for each O replaced by N, is correct. So the correct formula should be something like Al_(64+x)/3O_96-xN_x, but then I don't know how to adjust the x range to correspond to that 2.75 to 5 range, what the original intent was there. In any case, this way of writing the formula is complicated, and the molecular weight is confusing, nonsense. Instead, I went with the simple AlN 30-37 mole%, rest Al2O3, found in aforementioned US patent.

actually (64+0)/3 is not 64- it is 21 and a third, the chemical formula you removed is correct. —Preceding unsigned comment added by 86.128.171.202 (talk) 23:07, 23 June 2008 (UTC)

I agree with the second paragraph: Al_(64+x)/3O_32-xN_x (2.75 ≤ x ≤ 5) is perfectly fine without any issue when x = 0. The issue I have is in the "Manufacture" section where it state: "Its composition can vary slightly: the aluminum content from about 30% to 36%". I tend to believe that this is to be molar fraction, since otherwise Al content must be even higher. Now even molar fraction based on any of the formula obviously does not support this low aluminum content. — Preceding unsigned comment added by 167.191.240.1 (talk) 16:07, 23 September 2016 (UTC)

contrast with sapphire

This material is sapphire like, one potentially informative section would contrast it with sapphire ? PDBailey (talk) 03:22, 9 January 2009 (UTC)

The technical data PDF (see refs and below) does that and says eg :

Hardness (kg/mm2): ALON 1850, Fuzed silica 460, Sapphire 2200.

Since it is not as hard as sapphire maybe its advantage is cost or manufacturability Rod57 (talk) 03:49, 16 January 2011 (UTC)

The pricing given on this site of $10 to $15 per inch is an error, the unit is sq.cm not inches. The price per square metre is correct. This is for small windows (few square inches), 2mm to 5mm thick, in 5000 pce volume, from Surmet for delivery in 2013. I will update the date, and correct the figures." At $10 to $15 per sqcm, ALON costs the same as sapphire. The 2010 ALON paper referenced (Ref 2) compares ALON with sapphire: the benefit is that it is available in thicker sheets, and therefore resists large calibre ordnance better. I fixed the broken link on the reference, by linking it to ebooks: the paper seems to have been made subject to US controls but is widely available on the internet. AccHistories (talk) 11:58, 15 December 2012 (UTC)

Hardness

Article said "harder than glass" but that was very vague so I added some numbers based on :

The technical data PDF includes

• Young’s Modulus…….. 46.9x10^6 psi
• Hardness……………… 1850 Kg/mm2 (Knoop Indentation, 200g load)
• Fracture Toughness…….. 2.0 MPa-m1/2
• Flexure Strength………… 55,000 psi

and also compares properties with other materials. Could put in text or a suitable infobox. Rod57 (talk) 02:05, 18 January 2011 (UTC)

Conductivity

If anyone knows where to find it, please would they add the conductivity/insulation data ? Thanks. Darkman101 (talk) 02:19, 13 June 2011 (UTC)

Thermal or electrical/ionic conductivity? Thermal conductivity is given in the article (although annoyingly without a citation). ALON is an ionic conductor at elevated temperatures. This paper (which should be free to download) reports the AC conductivity of γ-ALON at high temperature : http://alexandria.tue.nl/repository/freearticles/617532.pdf As for the room temperature electrical conductivity/resistance values I can't find a suitable reference at present.Polyamorph (talk) 09:22, 13 June 2011 (UTC)

Suitability For Whale Containment

Maybe someone should add a section on this. 170.224.52.228 (talk) 03:21, 27 April 2012 (UTC)

Have you been reading Slashdot today? Mcavic (talk) 03:29, 27 April 2012 (UTC)

What Are ALON's Elastic Modulus and Tensile Strength?

Hello, I am looking for ALON's elastic modulus and tensile strength and I'd like to contrast these in the article with polycarbonate's since ALON seems to be aimed as a replacement for polycarbonate in ballistic situations. Comments? 23.16.152.103 (talk) 18:39, 3 September 2012 (UTC)BeeCier

This is already published in the datasheets referenced on this page, and quoted by some of the editors above. The main issue is cost: $10 to $15 per sq.cm.AccHistories (talk) 10:54, 15 December 2012 (UTC)

Images?

Could we have any images please? 84.152.14.149 (talk) 20:36, 13 October 2013 (UTC)

Star Trek reference

Someone wrote here that the writers of Star Trek IV heard about developments of this material, and decided to incorporate that into the plot...even to the point of including molecular images in the film. But the reference for this goes to a Makezine article that states only that it is possible the writers heard about this. — Preceding unsigned comment added by Awilliamwright (talk • contribs) 00:02, 3 October 2014 (UTC)

Yeah, that's pretty weak. I've yanked it. Thanks. - SummerPhD (talk) 13:47, 3 October 2014 (UTC)

Section restored with different refs/citations since it's notable and there's an existing disambig mentioning what was in the section. The pop culture reference is not a disputed fact; what was in dispute was why it was included in the film, not the article, which is irrelevant here. The Grumpy Hacker (talk) 13:25, 16 June 2021 (UTC)

History and Timeline

When was it developed? When did it become commercially available? How was it discovered? Coder0xff2 (talk) 21:40, 2 May 2018 (UTC)

Transparent Metal in 'Voyage to the Bottom of the Sea' (1961)

In the novel adaptation of the Voyage to the Bottom of the Sea feature film, published in 1961, it is mentioned that the windows of the Seaview submarine are made of a transparent metal. Eligius (talk) 05:59, 19 February 2022 (UTC)

"ALON ®" listed at Redirects for discussion

An editor has identified a potential problem with the redirect ALON ® and has thus listed it for discussion. This discussion will occur at Wikipedia:Redirects for discussion/Log/2022 April 15#ALON ® until a consensus is reached, and readers of this page are welcome to contribute to the discussion. BD2412 T 04:38, 15 April 2022 (UTC)

"ALON®" listed at Redirects for discussion

An editor has identified a potential problem with the redirect ALON® and has thus listed it for discussion. This discussion will occur at Wikipedia:Redirects for discussion/Log/2022 April 15#ALON® until a consensus is reached, and readers of this page are welcome to contribute to the discussion. BD2412 T 04:38, 15 April 2022 (UTC)