Electrically insulating material for thermal sprayed coatings matching the coefficient of thermal expansion of the underlying body

A material comprising a particle comprising a core portion comprising a first mixture, and an encasing portion comprising a second mixture,

• the first mixture comprising at least 50 mol % of a high-CTE material (component B1) and comprising less than 50 mol % of a non-sublimating electrical insulator (component A1);
• the second mixture comprising at least 50 mol % of a non-sublimating electrical insulator (component A2) and comprising less than 50 mol % of a high-CTE material (component B2);
• and
• wherein at least one of component A1 and component B1 has an average particle size up to about 100 microns;
• at least one of component A2 and component B2 has an average particle size up to about 20 microns;
• and
• component B1 having a coefficient of thermal expansion (CTE) at least about 10 μm/m/K;
• wherein the encasing portion at least partially encases the core portion, and wherein the material comprises essentially no spinel.