INORGANIC FIBERS SOLUBLE IN SALINE SOLUTION Russian patent published in 2007 - IPC C03C13/00 

FIELD: inorganic chemistry, building materials.

SUBSTANCE: invention relates to nonmetallic, amorphous, refractory fibrous materials that are insoluble in a saline solution. The proposed insulator comprises fibers of the following composition, wt.-%: 65%< SiO₂ <86%; MgO <10%; 14%< CaO <28%; Al₂O₃ <2%; ZrO₂ <3%; B₂O₃ <5%; P₂O₅ <5%; 72% <SiO₂ + ZrO₂ + B₂O₃ + 5*P₂O₅; 95% <SiO₂ + CaO + MgO + Al₂O₃ + ZrO₂ + B₂O₃ + P₂O₅, and 0.1% <R₂O₃ <4% wherein R is chosen from the following group: Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Y or their mixtures. Invention provides enhancing strength of fibers, resistance to temperature 1260°C without interaction with alumosilicate refractory brick.

EFFECT: improved and valuable properties of fibers.

25 cl, 4 tbl, 1 dwg