Yttrium aluminum garnet nanoparticles synthesized by nitrate decomposition and their low temperature densification behavior

The effects of TEOS on the microstructure and phase evolutions of YAG phase by formation of alumina/yttria core‐shell structures

“…( Figure 5B,C) located at 3500-3900 cm À1 and 2920 cm À1 , which could be related to Si-OH bonds and the -CH 2 functional group of TEOS molecules, respectively. 31 Similar to our work, Sang et al 32 could not observe any specific peak related to Si-O bonds in their research. For the B 2 (0.5 wt% TEOS) sample, after calcination at 550°C, all Si-OH and -CH 2 bonds at 3500-3900 cm À1 and 2920 cm À1 were broken and disappeared; however, some Si-OH stretching bonds existed in the B 3 sample (1 wt% TEOS).…”

“…The ‐OH bending vibration had a shoulder at 1640 cm −1 The FTIR spectra of precursors before the calcination treatment (A 1 , A 2 , and A 3 powders) were similar; only there were some extra peaks in the FTIR spectra of powders synthesized with the TEOS agent (Figure B,C) located at 3500‐3900 cm −1 and 2920 cm −1 , which could be related to Si–OH bonds and the –CH 2 functional group of TEOS molecules, respectively . Similar to our work, Sang et al could not observe any specific peak related to Si–O bonds in their research. For the B 2 (0.5 wt% TEOS) sample, after calcination at 550°C, all Si–OH and –CH 2 bonds at 3500‐3900 cm −1 and 2920 cm −1 were broken and disappeared; however, some Si–OH stretching bonds existed in the B 3 sample (1 wt% TEOS).…”

“…Neck‐sintering phenomena slightly appeared between powders in the C 2 specimen after calcining at 1400°C (Figure A). As shown in Figure B,C, round pores were formed in the aggregates without the grain growth, which could be regarded as the typical characteristic of the primary sintering stage in a ceramic . The silica (SiO 2 ) particles from a decomposition of TEOS agent could provide a liquid environment and eliminate large pores between YAG particles .…”

Effect of BaF_2 as a Flux in Solid State Synthesis of Y_3Al_5O_12:Ce^(3+)

“…YAG를 제조하는데 사용되어온 합성법에는 solvothermal synthesis, [5][6][7] 수열합성법 (hydrothermal synthesis), [8][9][10][11][12] 유기 금속 기상법(metal-organic chemical vapor) (MOCVD), 13) 공침법(co-precipitation), 14) 스프레이열분해법 (spray pyrolysis), 15,16) 방전플라즈마법(spark-plasma synthesis), 17) 극초 단파 자극법(microwave irritation), 18) 그리고 졸겔법 (solgel combustion) 19,20) (Fig. 5(b)).…”

Synthesis and photoluminescence properties of color-tunable BaLa2WO7:Eu3+ phosphor

“…The most common WLEDs use a 450-470 nm blue-light-emitting diode that excites a yellowlight-emitting yttrium aluminum garnet (YAG:Ce 3+ ) phosphor dispersed in an epoxy resin on a blue LED chip [1][2][3]. However, a single yellow phosphor cannot achieve low color temperatures, leading to a low color rendering index [4].…”