THORIUM (IV) OXIDE Harzard Sheet
Re: THORIUM (IV) OXIDE Harzard Sheet
They forgot to mention the thoron daughters
Glow brightly Glow free!
Larry Leins
Fusor Tech
Glow brightly Glow free!
Larry Leins
Fusor Tech
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Richard Hull
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Re: THORIUM (IV) OXIDE Harzard Sheet
Thoria is only found in certain rare lab crucibles and in transmitting and radar tube filaments to increase emission.
It used to be a large component in all Welschbach gas light mantles from about 1880 on into the late 1980's as Coleman lantern mantles. Now it is all replaced with various rare earth oxides which aren't nearly as effective as the old thoria mantles.
It is most widely distributed in the public domain, currently, as TIG welding rod additive in the 1-2% range. (red tipped rods.) Most weld shops are now avoiding their use, though they are still produced. (It's just a matter of time, I figure.)
I have a gang o' them.
Richard Hull
It used to be a large component in all Welschbach gas light mantles from about 1880 on into the late 1980's as Coleman lantern mantles. Now it is all replaced with various rare earth oxides which aren't nearly as effective as the old thoria mantles.
It is most widely distributed in the public domain, currently, as TIG welding rod additive in the 1-2% range. (red tipped rods.) Most weld shops are now avoiding their use, though they are still produced. (It's just a matter of time, I figure.)
I have a gang o' them.
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Re: THORIUM (IV) OXIDE Harzard Sheet
As for the lantern mantles, last week I found a brand that still uses Thorium, only in hydroxide and nitrate form. It is the Texsport brand, made in china . It is clearly marked as raioactive and contains Thorium. From one mantle I got 475 CPM from my CDV700. They are sold at Rose's department stores for $1 per 2.
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Richard Hull
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Re: THORIUM (IV) OXIDE Harzard Sheet
I checked my WWII/korean war Coleman GI mantles last night and they read about 6,100 cpm! I also checked a set of mantles made by Coleman that I purchased at a local store here in the 80's and they read about 4,000 cpm. Obviously, the chinese knockoffs are at a reduced thorium level over the good old days.
Richard Hull
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Re: THORIUM (IV) OXIDE Harzard Sheet
The package does say in contains cerium, magnesium , and aluminium. Guess the thorium is there to inhance the cerium.If the Colemans are that hot, I might have to break down and buy a few on Ebay. If I'm correct , Thorium is an alpha emitter. I only have a Anton 5993 tube. I really need a pancake tube to get a real count, as I'm only detecting some gamma.
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Carl Willis
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Re: THORIUM (IV) OXIDE Harzard Sheet
FYI, the Century-Primus mantles sold predominantly through Sears, e.g. the Century-Primus #2295, are thoriated. By my measurements with a Ludlum 44-9 pancake, one mantle reads about 10 kCPM (alpha / beta / gamma).
-Carl
-Carl
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ChrisSmolinski
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Re: THORIUM (IV) OXIDE Harzard Sheet
Want some very cheap thorium mantles? This company has a bunch (25,000 at last count) they are trying to get rid of. $25 got me around a hundred.
American Mantle Co.
410 Bedford Rd.
Morris, Ill 60450
Attn: Bonnie
American Mantle Co.
410 Bedford Rd.
Morris, Ill 60450
Attn: Bonnie