Evaluation of Electroelastic Properties of YCOB and GdCOB Crystals Irradiated by 6 MeV Xe²³⁺ Ions

Abstract

YCa4O­(BO3)3 (YCOB) and GdCa4O­(BO3)3 (GdCOB) crystals are promising piezoelectric materials for high-temperature sensing applications. The high-temperature condition is accompanied by hard irradiation, such as in a nuclear power plant. In this study, the electroelastic properties of YCOB and GdCOB crystals irradiated by different doses of 6 MeV Xe23+ (1013, 1015, and 1016 ions/cm2) were studied in the temperature range of 25–850 °C. YCOB and GdCOB crystals exhibit good electrical resistivity stability with irradiation, where the resistivity of >108 Ω·cm is achieved @700 °C. Meanwhile, the electroelastic properties are found to maintain similar values, with variations being less than 8% after irradiation. The band gaps of the YCOB and GdCOB crystals are narrowed upon irradiation, leading to a slight decrease in electrical resistivity, while the slight increase in the dielectric permittivity after irradiation is associated with the irradiation-induced distortion of the structure and weakening of chemical bonding. All the irradiation resistant properties demonstrate that the bulk YCOB and GdCOB crystals are good candidates for use in high-temperature piezoelectric sensing under harsh environments including hard irradiation.

High Temperature Ultrasonic Transducers: A Review

“…Due to irradiation slight changes were noticed: the piezoelectric coefficient d 12 changed a little, the electrical resistivity decreased, and the dielectric permittivity increased. Those changes can be explained by modifications in structural distortion and in chemical bonding [ 74 ].…”

Growth, thermal, and polarized spectral properties of the Sm:GdCa4O(BO3)3 crystal for a reddish-orange laser

“…Rare earth calcium oxyborate (REECOB) crystals, which belong to the monoclinic space group Cm, have developed rapidly in recent decades. [1][2][3][4][5][6] Such crystals can be obtained in large size by the Cz method because of their congruent melting nature. They are widely used in lasers and nonlinear and piezoelectric fields and are optoelectronic functional materials with excellent performance.…”

Widely Tunable Angular Non-Critical Phase-Matching Wavelengths from 0.72 to 1.42 μm Based on RE1xRE21−xCOB Mixed Crystals

“…In order to achieve component-dependence, the NLO crystals should be continuously doped uniform melts, and their refractive indices along with A-NCPM wavelengths could be controllable and tunable by changing the doped component parameters. Previous researches showed that the family of RECa 4 O(BO 3 ) 3 (RECOB, RE = Y, Gd, La, Tm, Sm, and Nd) crystals were found to be melted congruently and could be grown into a large-size by the Czochralski (Cz) pulling method [14][15][16][17]. More meaningful, the substitutional solid solutions of RE1 x RE2 1−x COB (RE1 = Y, RE2 = Gd, and La) crystals were found to have compositional uniformity along the growth direction [18][19][20].…”