High Temperature Structural Insulating Material.

摘要

A high temperature structural insulating material useful as a liner for cylinders of high temperature engines through the favorable combination of high service temperature (above about 800 exp 0 C), low thermal conductivity (below about 0.2 W/m exp 0 C), and high compressive strength (above about 250 psi). The insulating material is produced by selecting hollow ceramic beads with a softening temperature above about 800 exp 0 C, a diameter within the range of 20-200 mu m, and a wall thickness in the range of about 2 to 4 mu m; compacting the beads and a compatible silicate binder composition under pressure and sintering conditions to provide the desired structural form with the structure having a closed-cell, compact array of bonded beads. (ERA citation 10:014100)