CERAMIC INSULATOR AND METHODS FOR USE AND MANUFACTURE THEREOF Russian patent published in 2013 - IPC C04B35/553 C03C10/16 H01B3/12 

FIELD: chemistry.

SUBSTANCE: insulator has the following ceramic composition, wt %: SiO₂ 25-60; R₂O₃ 15-35%, where R₂O₃ is B₂O₃ 3-15% and Al₂O₃ 5-25%; MgO 4-25% + Li₂O 0-7%, where the total amount of MgO+Li₂O is about 6-25%; R₂O in amount of 2-20%. Wherein R₂O is Na₂O 0-15%, K₂O 0-15%, Rb₂O 0-15%; Rb₂O 0-15%; Cs₂O 0-20% and F 4-20% and contains crystalline grains that are oriented to extend in a first (circular) direction and in a direction (radial) perpendicular to the first direction, and a first region where there is compression stress and a second region where there is tensile stress.

EFFECT: high mechanical and electrical strength of the insulator.

15 cl, 11 dwg