Sintering and grain growth in SiO2 doped Nd:YAG

Fabrication of Nd:YAG transparent ceramics with TEOS, MgO and compound additives as sintering aids

“…2 shows the optical transmittance spectra of the samples with different quantity of TEOS, all the samples are 1.4 mm thick. The transmittance of the samples in this group increases with the increasing TEOS except sample 5 and the optimum amount of TEOS is 0.5 wt%, which is in consistent with other literatures [14][15][16][17]. The transmittance of sample 4 reaches 80.80% at the wavelength of 1064 nm, and meanwhile a dense and pore-free microstructure is observed in Fig.…”

“…3(a). According to the literatures [16,18], a liquid phase which means the beginning of intensified liquid sintering, will be formed from the direct reaction between SiO 2 and YAG round 1380 • C. As seen in Fig. 4 in YAG-SiO 2 phase diagram given by O. Fabrichnaya [19], if only introducing a trace amount of SiO 2 , the more SiO 2 is, the more liquid will be formed.…”

Ce:YAG transparent ceramics based on nanopowders produced by laser ablation method: Fabrication, optical and scintillation properties

“…There are two main methods for meeting these requirements. In the first approach, referred to as the solid state reaction method (SSR) [13] or the reactive sintering method [14], commercial oxide powders are mixed together, then the mixture is dried, pressed and sintered to transparency. Thus, the phase transformations of Y 2 O 3 and Al 2 O 3 into Y 3 Al 5 O 12 occur at the vacuum sintering.…”

Microstructure evolution of SiO2, ZrO2-doped Y3Al5O12:Nd3+ ceramics obtained by reactive sintering

“…Since the first report on lasing using YAG:Nd 3+ ceramic gain media [18], many research teams were involved in development of optical ceramics with improved laser characteristics, studying sintering routes, nanopowders synthesis and consolidation techniques [19], as well as establishing the role of sintering additives in order to control the diffusional mass transport [20]. In [21][22][23][24][25] the effect of silica on densification of garnet ceramics was studied. It has been determined that doping by SiO 2 would not be an appropriate approach to obtain the extremely low level of residual defects necessary for high-energy lasers [14].…”