TY - JOUR T1 - An ultrasonic study of sodium ion diffusion in polycrystalline alumina JO - Materials Research Bulletin PY - 1981/01/01 AU - Almond DP AU - Çallica H AU - West AR ED - DO - DOI: 10.1016/0025-5408(81)90187-2 PB - Elsevier BV VL - 16 IS - 1 SP - 117 EP - 124 Y2 - 2025/04/18 ER -