Crystal growth of La2Hf2O7 by micro-pulling-down method using W crucible

Crystal growth, luminescence, and scintillation properties of Er-doped La2Hf2O7 single crystal

“…The W-crucible, which has a higher mp than Ir, has made it possible to grow functional single crystals with a high mp of over 2200 °C. 19,20) Thus, LHO single crystals were successfully grown from the melt in a W-crucible.…”

“…Er 3+ ions in luminescent and scintillator materials have been widely studied in previous reports. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Their emissions, which originate from the 4 I 13/2 -4 I 15/2 be observed in the IR region. If emissions in the IR region can be realized in LHO single crystals with high potential, it is expected to be developed into some devices for applications such as communication and observation using IR light.…”

Features of the Structural Formation of Tungsten Single Crystals in the Shape of Hollow Rotational Bodies

“…Quartz, alum, graphite, platinum, molybdenum, tantalum, and tungsten are mainly used for making crucibles. Taking into account the set of physical and chemical properties of the given range of materials, tungsten most fully meets the requirements for high-temperature application in growing oxides and nitrides of certain metals with a melting point above 1800 o C. In addition, tungsten has the lowest coefficient of linear thermal expansion (4.3•10 -6 at 0°C to 5.8•10 -6 °C−1 at a temperature of 2100°C), which is very important when using crucibles in non-stationary thermal conditions [3][4][5].…”