Electrical insulating refractory composition

Compositions: ceramic – Ceramic compositions – Refractory

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Details

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

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