Effects of aging on the characteristics of Nd:YAG nano-powders

Sintering and laser behavior of composite YAG/Nd:YAG/YAG transparent ceramics

“…Neodymium-doped yttrium aluminum garnet (Nd:YAG) single crystals have been widely used as a solid-state laser material in the various fields [1,2]. However, there remains the challenge of finding an approach that can overcome the technologic and economic issues of conventional single crystal laser gain media [3].…”

Preparation and characteristics of core–shell structure Y3Al5O12:Yb3+@SiO2 nanoparticles

“…So many detail studies on the precipitaion method have been reported such as the effect of precipitant concentration on the formation procedure of YAG phase [8], microwave-assisted precipitation [16], a novel mixed precipitation method [17] that alumina precursor is first prepared and then two kinds of precursors are mixed through the precipitation of yttrium ions in the suspension consisting of yttrium ions solution and alumina precursor, and then YAG powders are obtained by calcining the mixed precursors in air. But it still meets the defeats: aging phenomena [16,18], agglomeration and irregular morphology of the products. Recently, core-shell structure materials have been investigated in detail because they can modify the morphology of nano-particles and avoid the agglomeration [19][20][21]24,25,30].…”

Dispersion of concentrated aqueous neodymia–yttria–alumina mixture with ammonium poly(acrylic acid) as dispersant

“…8 shows the straight-line light transmission curve of Nd:YAG transparent ceramic. From this curve, we can see that the optical transmittance of the sample is 72.1% at the lasing wavelength of 1064 nm, which is lower than that of single crystal Nd:YAG [41]. The characteristic absorption peak of neodymium ions at 808 nm is evident.…”

“…Although there are three different YAG ceramic fabrication processes, including nanoparticle preparation, green body formation, and sintering, in attempting to control the porosity of the ceramic, the effect of the formation process is often ignored. The reported YAG formation methods are typically dry-pressing [4][5][6][7][8][9][10], iso-static pressing [6,9,11,12] and a few reports that indicate using the slip casting method [13][14][15][16]. Generally speaking, using a green body obtained from a press formation method makes it difficult to obtain a pore-free ceramic with vacuum sintering because some air is always trapped in the closed micro-cavities formed by the tightly contacted particles in the green body during the high pressure formation process.…”