Observation of Elasticoluminescence from CaAl[sub 2]Si[sub 2]O[sub 8]:Eu[sup 2+] and Its Water Resistance Behavior

We successfully developed an elasticoluminescent (EML) material with water resistance, (CASE). The crystal structure, photoluminescence (PL), and EML properties were characterized for both CASE and the typical EML material (SAOE). Contrary to SAOE, CASE showed superior water resistance property. No changes were found in the X-ray diffraction patterns or the PL and EML intensities during the total water immersion test.