Patent ID: 7368408

Claim:
A glass-ceramic composition comprising: first ceramic particles comprising forsterite; second ceramic particles comprising at least one member selected from the group consisting of calcium titanate, strontium titanate, and titanium oxide; and at least about 3% borosilicate glass particles containing about 3% to 15% lithium oxide, about 20% to 50% magnesium oxide, about 15% to 30% boron oxide, about 10% to 45% silicon oxide, about 6% to 20% zinc oxide, 0% to about 15% aluminum oxide, and at least about 2% of at least one additive selected from the group consisting of calcium oxide, barium oxide, and strontium oxide, wherein the upper limit of the additive content is 15%, 25%, or 25% when the additive is calcium oxide, barium oxide, or strontium oxide, respectively, and wherein all percentages are by weight.