Fabrication of polycrystalline (Y0.7Gd0.3)2O3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity

Controlled processing of (Gd,Ln)2O3:Eu (Ln = Y, Lu) red phosphor particles and compositional effects on photoluminescence

“…In addition, Y 3+ doping can effectively suppress the phase transformation of Gd 2 O 3 through solid-solution formation. (Gd,Y) 2 O 3 :Eu is a promising material to be used in the fields of fluorescent lamp, white LEDs, and can also be densified into transparent ceramic scintillator by high-temperature sintering [17, 18]. …”

Laser-induced spectra change in nanocrystalline GdYO3:Eu3+

“…One is a slow weight loss attributed to evaporation of water, the decomposition of and Re(NO 3 ) 3 (Re¼Gd, Y and Eu), and combustion of carbon. The other sharp weight loss (8.21%) can be attributed to the decomposition of Re(OH) 3 and Re 2 (CO 3 ) 3 (Re¼Gd, Y and Eu) to crystalline YGdO 3 . Among them, OH À , NO 3 − and CO 3…”

“…The GdYO 3 :Eu 3 þ powder could be observed after the combustion was over. The particle size was controlled by the mole ratio of [Gly] to [NO 3 − ], which was 1.6 in the experiment. The powder was divided into five shares and four shares of which were annealed at 400°C, 600°C, 800°C and 1000°C for 1 h. The samples of as-prepared were denoted as S J (J ¼1, 2, 3 and 4).…”

“…As a very good scintillator, this mixed oxide phosphor ceramic has been already used in X-ray computed tomography medical imaging [2]. As Gd 2 O 3 has high X-ray absorption coefficient, the GdYO 3 solid solution with various concentrations of Gd 2 O 3 can tune the X-ray stopping length [3]. There are many factors that influence the quality of powder ceramic GdYO 3 , such as the primary particle size, agglomeration level of powder, sintering temperature and time, final grain size and presence of pores [4,5].…”

White‐ and blue‐light‐emitting dysprosium(III) and terbium(III)‐doped gadolinium titanate phosphors

“…Although quantum size effects are much less pronounced with nanophosphors than with semiconducting quantum dots or noble‐metal nanoparticles (NPs), the reduction of phosphor size can lead to better doping and phase uniformity and higher doping concentration compared to bulk counterparts. In addition, nanophosphors can have improved emission kinetics, can be used as precursors for high density transparent or translucent ceramics and offer the possibility for tuning their optical properties using nanocomposites or crystal‐field engineering …”