ISOLANTE DE VELA DE IGNIÇÃO, MATERIAL CERÂMICO, E, CERÂMICA.

摘要

A ceramic, comprising:
alumina in an amount between about 90 and about 99% by weight;
a zirconium containing compound in an amount between about 0.01 % and about 1% by weight; and
an oxide mixture in an amount between about 1 and about 10% by weight, said oxide mixture including a glass former, a network modifier, Boron Oxide, and Phosphorus Oxide, and wherein the molar ratio of said glass former to said network modifier ranges between about 0.8:1 and 1.2:1.