摘要 |
Thermal insulation is provided for use in applications requiring continuous resistance to temperatures of 1260° C. without reaction with alumino-silicate firebricks, the insulation comprises fibers having a composition in wt % 65%<SIO<SUB>2</SUB><86% MgO<10% 14%<CaO<28% AL<SUB>2</SUB>O<SUB>3</SUB><2% ZRO<SUB>2</SUB><3% B<SUB>2</SUB>O<SUB>3</SUB><5% P<SUB>2</SUB>O<SUB>5</SUB><5% 72%<SIO<SUB>2</SUB>+ZrO<SUB>2</SUB>+B<SUB>2</SUB>O<SUB>3</SUB>+5*P<SUB>2</SUB>O<SUB>5 </SUB> 95%<SIO<SUB>2</SUB>+CaO+MgO+Al<SUB>2</SUB>O<SUB>3</SUB>+ZrO<SUB>2</SUB>+B<SUB>2</SUB>O<SUB>3</SUB>+P<SUB>2</SUB>O<SUB>5 </SUB> Addition of elements selected from the group Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or mixtures thereof improves fiber quality and the strength of blankets made from the fibers.
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