Compositions: ceramic – Ceramic compositions – Refractory
Patent
1989-04-21
1996-01-30
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501102, 501103, 501106, 501123, 423306, C04B 3548
Patent
active
054880181
ABSTRACT:
Three families of ceramic compositions having the given formula: .phi..sub.1+X Zr.sub.4 P.sub.6-2X Si.sub.2X O.sub.24, .phi..sub.1+X Zr.sub.4-2X Y.sub.2X P.sub.6 O.sub.24 and .phi..sub.1+X Zr.sub.4-X Y.sub.X P.sub.6-2X Si.sub.X O.sub.24 wherein .phi. is either Strontium or Barium and X has a value from about 0.2 to about 0.8 have been disclosed. Ceramics formed from these compositions exhibit very low, generally near neutral, thermal expansion over a wide range of elevated temperatures.
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Bell Mark L.
Marcantoni Paul
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