Translucent polycrystalline alumina and method of making same
 An optically translucent polycrystalline alumina sintered body consists essentially of alumina, magnesia, terbia and, optionally, yttria. The magnesia is present in an amount of about 0.020 wgt. percent and the terbia is present in an amount of from about 0.005 to 0.060 wgt. percent. The yttria is present in an amount up to about 0.035 wgt. percent. 
OSRAM Sylvania Inc.
C H H
C04B H01J H01J
inventional inventional inventional
David George Arlene
Goodman Wei Hecker