Aeronautics & Space

Would 441 pounds satisfy your sapphire craving?

By / July 11, 2009

Rubicon Technology claims it has successfully grown the world’s largest Al2O3 crystal, a boule that weighs in at 200 kg (441 lb). The company says it plans to use the…

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Proposal for new space heat shield

By / June 22, 2009

As NASA and other space agencies send space vehicles on missions that bring them closer and closer to the sun, one problem is finding improved heat shields. Recently, a group…

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