Author(s)

Mohammad Faheem, Kelvin Lynn

Center for Materials Research, Washington State University, Pullman, WA, USA.

The structural and thermal properties of yttrium-aluminum-gadolinium-gallium (Y_2.97Gd_0.03Al₂Ga₃O₁₂) single crystals doped with terbium (0.1%), cerium (0.01%) and co-doped with both terbium and cerium ((0.1, 0.01)%) were investigated. All samples were heated (calcined) at 1400°C for 15 hours before crystallization. X-ray powder diffraction (XRD) patterns of all calcined samples showed the presence of yttrium gallium aluminate (Y₃Al₂Ga₃O₁₂) and gadolinium gallium oxide (Gd₃GaO₆) while the grown crystals were single phase of Y₃Al₂Ga₃O₁₂. The lattice parameter of the crystals decreased with Ce doping. The thermal conductivity of each sample was determined from 25°C to 300°C and found to decrease exponentially with increasing temperature. All doped crystals have different thermal conductivity, which is attributed to the crucial influence of crystals structures. 0.01% Ce:YAGG was found to be a strong candidate for scintillators and other lasing materials because of its good thermal behavior (10.71 W/m·K).

YAGG Single Crystals, Lattice Parameters, Thermal Conductivity

Faheem, M. and Lynn, K. (2014) Structural and Thermal Properties of Tb, Ce Doped Y_2.97Gd_0.03Al₂Ga₃O₁₂ Single Crystals. American Journal of Analytical Chemistry, 5, 695-700. doi: 10.4236/ajac.2014.511078.