Thread: Silicification
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Old 05-12-2008, 05:52 AM
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Silicification

Quasi-petrified wood

http://www.physorg.com/news2801.html

"...1 centimeter cube of wood a two-day acid bath, soaked it in a silica solution for two more (for best results, repeat this step up to three times), air-dried it, popped it into an argon-filled furnace gradually cranked up to 1,400 degrees centigrade to cook for two hours, then let cool in argon to room temperature."

"...Instant petrified wood, the silica taking up permanent residence with the carbon left in the cellulose to form a new silicon carbide, or SiC, ceramic. The material "replicates exactly the wood architecture..."
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http://www.pnl.gov/news/release.asp?id=1

"Using a simple chemical process, Shin soaked the wood in acid, then infused it with a source of either titanium or silicon and baked it in an argon-filled furnace."

"Presto. Instant petrified wood, in which the silica and titanium take up permanent residence with the carbon left in the cellulose to form the ceramics silicon carbide, or SiC, and titanium carbide, TiC."

"...Technically, the wood is not really fossilized, says Briggs, because silicon and carbon never bond in normal fossilization...And it is very tough, something one laboratory assistant learned the hard way. "He broke two diamond blades trying to cut it..."
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