Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: Titanscape on 15/04/2004 19:48:55

Title: Heat resistant dark mineral wanted.
Post by: Titanscape on 15/04/2004 19:48:55
I am searching for a heat resistant dark odourless granulatable mineral. Carbon won't do for it would burn in the atmosphere. Any ideas?

Titanscape
Title: Re: Heat resistant dark mineral wanted.
Post by: tweener on 16/04/2004 02:34:25
How fine do you need it and how much do you need?  Several types of rock and lava come to mind, but if you need a fine powder or very much, it could be a problem.

----
John - The Eternal Pessimist.
Title: Re: Heat resistant dark mineral wanted.
Post by: Titanscape on 16/04/2004 21:21:54
It has to absorb regular blasts from a hot laser beam. Stones or sand grain size would be good. All that comes to mind is a stone we use around railway tracks here in Australia called blue metal.

Titanscape
Title: Re: Heat resistant dark mineral wanted.
Post by: Rabbit on 16/04/2004 22:18:30
Ehhh, Titanscape, what are you actually DOING with the laser beam and why does the rock or whatever have to be odourless? I've tried to guess this for myself but I just come up with weird ideas and (maybe) off mark. So, what IS it you want to do....
Title: Re: Heat resistant dark mineral wanted.
Post by: tweener on 17/04/2004 02:46:04
You can go to a garden or landscape shop and get lava rock, or several other types of rocks that would work.  If you get the softer, very porous, lava rocks (I don't know the technical name, but they'll be labeled "lava rock") you can probably crush them down to a smaller size if you want.  It sounds like you don't need a large quantity, but they will sell them in good size bags.

So, what sort of laser beam?  What are you up to?  We really need to know, as this is our only excitement in life - finding out what other NS forum members are up to.

----
John - The Eternal Pessimist.
Title: Re: Heat resistant dark mineral wanted.
Post by: MayoFlyFarmer on 17/04/2004 08:57:59
I'm worried.....   this sounds like a pretty crazy experiment!!

Lift your skinny fists, like antennas to hevan!
Title: Re: Heat resistant dark mineral wanted.
Post by: Titanscape on 17/04/2004 20:41:44
I think I like Titanium dioxide sand too. It is needed because the hot laser is part of a denaturing process. And it would need either go out into the sky or be absorbed by a dark mineral which is safe to be around.

Titanscape
Title: Re: Heat resistant dark mineral wanted.
Post by: neilep on 18/04/2004 23:46:12
Any one of my wifes cakes will do the job !!!....I thank my lucky stars she never reads any of this !!        (https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fsmilies.jeeptalk.org%2Fcontrib%2Flilly%2Fhmm3grin2orange.gif&hash=27245f57dff0fcb3c5472c1203dc584c)

'Men are the same as women...just inside out !'
Title: Re: Heat resistant dark mineral wanted.
Post by: tweener on 16/04/2004 02:34:25
How fine do you need it and how much do you need?  Several types of rock and lava come to mind, but if you need a fine powder or very much, it could be a problem.

----
John - The Eternal Pessimist.
Title: Re: Heat resistant dark mineral wanted.
Post by: Titanscape on 16/04/2004 21:21:54
It has to absorb regular blasts from a hot laser beam. Stones or sand grain size would be good. All that comes to mind is a stone we use around railway tracks here in Australia called blue metal.

Titanscape
Title: Re: Heat resistant dark mineral wanted.
Post by: Rabbit on 16/04/2004 22:18:30
Ehhh, Titanscape, what are you actually DOING with the laser beam and why does the rock or whatever have to be odourless? I've tried to guess this for myself but I just come up with weird ideas and (maybe) off mark. So, what IS it you want to do....
Title: Re: Heat resistant dark mineral wanted.
Post by: tweener on 17/04/2004 02:46:04
You can go to a garden or landscape shop and get lava rock, or several other types of rocks that would work.  If you get the softer, very porous, lava rocks (I don't know the technical name, but they'll be labeled "lava rock") you can probably crush them down to a smaller size if you want.  It sounds like you don't need a large quantity, but they will sell them in good size bags.

So, what sort of laser beam?  What are you up to?  We really need to know, as this is our only excitement in life - finding out what other NS forum members are up to.

----
John - The Eternal Pessimist.
Title: Re: Heat resistant dark mineral wanted.
Post by: MayoFlyFarmer on 17/04/2004 08:57:59
I'm worried.....   this sounds like a pretty crazy experiment!!

Lift your skinny fists, like antennas to hevan!
Title: Re: Heat resistant dark mineral wanted.
Post by: Titanscape on 17/04/2004 20:41:44
I think I like Titanium dioxide sand too. It is needed because the hot laser is part of a denaturing process. And it would need either go out into the sky or be absorbed by a dark mineral which is safe to be around.

Titanscape
Title: Re: Heat resistant dark mineral wanted.
Post by: neilep on 18/04/2004 23:46:12
Any one of my wifes cakes will do the job !!!....I thank my lucky stars she never reads any of this !!        (https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fsmilies.jeeptalk.org%2Fcontrib%2Flilly%2Fhmm3grin2orange.gif&hash=27245f57dff0fcb3c5472c1203dc584c)

'Men are the same as women...just inside out !'
Title: Re: Heat resistant dark mineral wanted.
Post by: Donnah on 19/04/2004 23:01:20
You should thank your lucky stars Neil.  You'd likely be seeing stars if your wife read the thread about you wanting to breed with aliens.
Title: Re: Heat resistant dark mineral wanted.
Post by: neilep on 19/04/2004 23:13:50
Just doing my bit for humanity and in the name of Science Donnah !!...*blushing but cheeky*

'Men are the same as women...just inside out !'
Title: Re: Heat resistant dark mineral wanted.
Post by: Exodus on 19/04/2004 23:57:20
quote:
Originally posted by tweener

How fine do you need it and how much do you need?  Several types of rock and lava come to mind, but if you need a fine powder or very much, it could be a problem.

----
John - The Eternal Pessimist.



If we are talking resistant volcanic rocks there are a few that come to mind... If it must be dark then volcanic glass (Obsidian) is a possibility. Unsure of what "lava rock" is classified as, if it is pummice the i wouldnt suggest it would be particularly resistant, it is however the only volcanic rock you'll easily be able to make into a powder. You could use a black volcanic sand although i'm not sure where you'd pick that up from... I'f i'd have known i could have grabbed you some off the beach while i was in Tenerife [:D]

Resident Tour Operator - The Naked Scientists
Title: Re: Heat resistant dark mineral wanted.
Post by: tweener on 20/04/2004 02:28:39
I thought of obsidian, but then thought that it might be too reflective, thus sending shards of laser beam all over the place.  I was thinking of the black pummice that looks like a hard foam.  It has matte surfaces and is relatively soft and easy to crush.  I'm sure there are better substances, but I don't know what they are.

----
John - The Eternal Pessimist.
Title: Re: Heat resistant dark mineral wanted.
Post by: chris on 20/04/2004 05:41:15
What about the black tiles used to coat the underside of the space shuttle ? What are they made from ?

Chris

"I never forget a face, but in your case I'll make an exception"
 - Groucho Marx
Title: Re: Heat resistant dark mineral wanted.
Post by: Exodus on 20/04/2004 23:42:12
quote:
Originally posted by tweener

I thought of obsidian, but then thought that it might be too reflective, thus sending shards of laser beam all over the place.  I was thinking of the black pummice that looks like a hard foam.  It has matte surfaces and is relatively soft and easy to crush.  I'm sure there are better substances, but I don't know what they are.

----
John - The Eternal Pessimist.



You can buy some black pumice off of uncle sam [;)]
http://www.uncleharrys.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=UHNP&Product_Code=26110&Category_Code=SP-26

Resident Tour Operator - The Naked Scientists
Title: Re: Heat resistant dark mineral wanted.
Post by: tweener on 21/04/2004 03:33:18
I'm not the one buying here.  I think this is needed in Austrailia.  

I haven't had a chance to build my megawatt laser yet.

----
John - The Eternal Pessimist.