Beryllium self-diffusion coefficients were determined in high-density polycrystalline BeO at 800 to 1795C. A precision lapping method using Be as a radiotracer was used above 1180C, and electrical conductivity was used between 800 and 1250C. The volume diffusion coefficients determined by both

methods correlated well between 1100 and 1250C. The results were described, at 1100°to 1800C, by:

D(cm2/s) = 3.2 x 10-3 exp[-63000/RT]

H.J.De Bruin, G.M.Watson, C.M.Blood: Journal of Applied Physics, 1966, 37[12], 4543-9