Preparation of YAG nanopowders and ceramics via coprecipitation: Effects of treatment modes of precipitates

Abstract

Effects of treatment modes of precipitates in the coprecipitation method on the resulting YAG nanopowders and ceramics are investigated. Three treatment modes for precipitates, namely, single water washing, water–ethanol washing, and water washing–ethanol immersion, are conducted to prepare the YAG nanopowders. The average particle size (∼62 nm) and distribution (mainly ranging from 30 to 110 nm) of the powders obtained by the three modes are similar. However, the dispersity of the three powders shows large differences. The nanopowder obtained via water washing–ethanol immersion possesses optimal dispersity without any agglomeration, whereas that obtained via single water washing comprises substantially hard agglomerations. The relative density, Vickers hardness, and optical in‐line transmittance of the ceramics prepared via water washing–ethanol immersion, respectively, reach 99.85%, 14.1 ± .4 GPa, and 77.8% at 1064‐nm wavelengths after spark plasma sintering. These results are markedly superior to those of the ceramics prepared using the two other modes (97.43%, 6.8 ± .7 GPa, and 17.2% at 1064‐nm wavelengths and 98.97%, 10.2 ± .5 GPa, and 47.8% at 1064‐nm wavelengths, correspondingly). Therefore, water washing–ethanol immersion is a sensible and advisable treatment mode of precipitates for preparing YAG nanopowder and ceramics via coprecipitation.

Development and prospects of garnet ceramic scintillators: A review

“…Since Ikesue et al [110] prepared the YAG:Nd transparent ceramics with high optical quality by the solid-state reaction method in 1995 and successfully achieved its lasing, the preparation of the garnet-structured transparent ceramics has received wide attention in Refs. [111][112][113][114][115]. While the translucent scintillators also have their applications, for HEP and high-tech medical devices, high transmittance is necessary to reduce self-absorption and optical scattering.…”

Basic principle, progress, and prospects of coal gangue ceramic proppants

“…At present, hydraulic fracturing technology is widely used in the exploration of oil and gas wells in various formations 5,6 . The results of hydraulic fracturing determine the production efficiency of oil and gas wells to a certain extent, and the performance of proppant plays a decisive role in hydraulic fracturing 7–10 …”

“…5,6 The results of hydraulic fracturing determine the production efficiency of oil and gas wells to a certain extent, and the performance of proppant plays a decisive role in hydraulic fracturing. [7][8][9][10] The proppants used at present can be divided into three categories, namely, quartz sand, resin-coated, and ceramic proppants, and their appearance and properties are shown in Figure 1B. [11][12][13] Quartz sand is a traditional proppant and mainly obtained from nature, and it has the advantage of low cost.…”

Finite element simulation and experimental analysis of B4C‐TiB2‐SiC ceramic cutting tools

“…Although the fracture toughness and impact resistance of single-phase B 4 C ceramics are poor, these defects of B 4 C ceramics can be alleviated by introducing a toughening phase, such as boride, carbide, or oxide. [12][13][14][15] Titanium boride (TiB 2 ) is an applicable toughening phase for B 4 C ceramics, and the addition of TiB 2 to B 4 C ceramics can effectively improve the fracture toughness of B 4 C ceramics without sacrificing the hardness. [13][14][15][16] Therefore, the B 4 C-TiB 2 composite ceramic is a potential candidate tool for cutting superhard materials.…”

“…[12][13][14][15] Titanium boride (TiB 2 ) is an applicable toughening phase for B 4 C ceramics, and the addition of TiB 2 to B 4 C ceramics can effectively improve the fracture toughness of B 4 C ceramics without sacrificing the hardness. [13][14][15][16] Therefore, the B 4 C-TiB 2 composite ceramic is a potential candidate tool for cutting superhard materials. However, the study and application of B 4 C-TiB 2 composites as cutting tools are rare.…”