Compositions: ceramic – Ceramic compositions – Refractory
Patent
1982-04-12
1983-11-15
Poer, James
Compositions: ceramic
Ceramic compositions
Refractory
174102P, 174118, 174137B, C04B 3504, C04B 3548
Patent
active
044156740
ABSTRACT:
Sheathed electrical heating elements containing MgO heat conductive, electrical insulating material having an additive of fine particles of spherically shaped fused ZrO.sub.2 to increase the electrical resistivity and maintain favorable tap density and flow properties. The spherically shaped ZrO.sub.2 particles are formed by gravitationally separating the ZrO.sub.2 particles from ground fused zircon (ZrO.sub.2.SiO.sub.2).
REFERENCES:
patent: 3457092 (1969-07-01), Tervo
Berneike Richard H.
Combustion Engineering Inc.
Poer James
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