Research on the phase decomposition of LuxY1−xAlO3:Ce crystals at high temperatures

The melting behavior of lutetium aluminum perovskite

“…The minor differences are only with respect to some electronic parts; but the furnace, sample holder with thermocouples, crucible, heating rate, and atmosphere are identical. [6]. It should be noted that there the "exo" direction was chosen downwards, whereas throughout this paper "exo" is upwards, in agreement with the ASTM E 472-86 standard.…”

“…All Lu 2 O 3 -Al 2 O 3 phase diagrams published so far [6,7,9] assume that LuAlO 3 decomposes slowly below ≈ 1770…”

“…This, together with strong gas convection, may be responsible for aluminum loss and for the claim of the perovskite decomposition in the solid phase following (1), or even under the formation of Lu 2 O 3 . The main difference of the Lu 2 O 3 -Al 2 O 3 phase diagrams that was published by Petrosyan et al [7], compared with the diagram by Wu, Pelton [9] (that can also be found in [6,20]) is the decomposition of solid LuAlO 3 perovskite to a phase mixture of solid Lu 4 Al 2 O 9 (monoclinic phase) and solid Lu 3 Al 5 O 12 5 below and above some critical temperatures. The decomposition seems unquestionable for small T 1800…”

“…Occasionally, gas bubble inclusions were found along the crystals' central axis. [5,6]. Recently Petrosyan et al [7] explained this observation by the assumption that LuAlO 3 is stable only in a limited temperature range 1750…”

Peculiarities of layered perovskite-related GdSrFeO4 compound solid state synthesis

“…Mentioned previously difficulties are connected with thermal instability and multi-staged formation character of many from considered oxides [11][12][13][14][15][16][17]. Survey of literature on the data subject has shown the importance of mechanism and kinetics formation investigation to develop the optimal synthesis conditions of such complex compounds [18][19][20].…”