Lead-free at last

Article Abstract:

The environmental concerns over the lead content in the most successful piezoelectric ceramics, which are based on, lead zirconate and lead titanate could disappear with the advent of a new lead-free ceramic. Lead-free piezoceramics are created with properties that closely match the compositions of lead zirconate titanate, the 'PZT' family of ceramics.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum), Secondary nonferrous metals, Refined Lead, Secondary Lead, Lead, Piezoelectric ceramics

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The vanishing coast

Article Abstract:

One of the post effects of Hurricane Katrina on the Louisiana coast, in Little Vermilion Bay has caused the coast to vanish. An effort to gauge the destruction as to what is destroyed and what might be saved is made.

Marshes, Coasts, Hurricane Katrina, 2005

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