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Morphological Control of Zn2SiO4:Mn Phosphor Particles by Adding Citric Acid in Spray Pyrolysis Process

“…The spherical phosphor particles can also optimize the optical and geometrical structure of the phosphor layer. 13) Figure 1 shows the SEM images of Zn 2 SiO 4 :Mn phosphor particles prepared from aqueous solutions both with and without CA, in which the particles were as-prepared at 800 C by large-scale spray pyrolysis using metal alkoxide precursor. The addition of CA affected the morphology of the as-prepared powders.…”

“…12) Che et al showed that the addition of ammonia into the spraying solution is effective in obtaining solid-structure materials due to the formation of ammine complex in the droplet. 13) Mn 2þ -doped Zn 2 SiO 4 phosphor has been widely applied as a green-light-emitting component in lamps and the display industry because of its high luminous efficiency and chemical stability. 14,15) In this work, we have utilized large-scale spray pyrolysis process using metal alkoxide precursor in the preparation of Zn 2 SiO 4 :Mn phosphor particles and achieved the morphological control of the particles by adding citric acid.…”

Preparation and characterization of fine Sr2CeO4 blue phosphor powders

“…1(d), indicating that the decomposition of Sr(NO 3 ) 2 was not complete. Reduction by ammonia probably yielded metallic Sr [19]. In other words, SrO, which was formed from decomposition of Sr(NO 3 ) 2 and Sr(OH) 2 , may have been reduced to metallic Sr by ammonia in the atmosphere.…”

Unravelling the onset of the exchange bias effect in Ni(core)@NiO(shell) nanoparticles embedded in a mesoporous carbon matrix

“…10 Much effort has been made in order to produce oxide-free NPs, encapsulated by silica 13,14 or graphite layers. [15][16][17][18][19][20][21] The usual procedure followed to obtain metal(core)@oxide(shell) NPs consists of first synthesizing FM NPs by different techniques such as chemical reduction, [22][23][24] sol-gel, [25][26][27][28] spray pyrolysis, 29 laser ablation, 30 thermal decomposition 9 or high energy ball milling. [31][32][33] Afterwards, FM NPs are exposed to air or further processed through reactive treatments in order to create the oxide shell.…”