Nov 15, 2023 · Effects of additive content, sintering temperature as well as HIP method on the microstructure of Al 2 O 3 ceramics were systematically investigated. The experimental results show that the effect of HIP on the transmittance of PCA in the visible light region is particularly obvious, which can increase the transmittance by almost two times.

Apr 1, 2024 · The microstructures and elemental mapping of the nanocrystals in the glass-ceramics were analyze using a transmission electron microscopy (TEM, Talos F200S, USA). The glass-ceramic powder samples were dispersed in ethanol and …

Aug 1, 2023 · In this work, we describe a route used to fabricate transparent γ-Al 2 O 3 ceramics via GPa-grade high-pressure sintering of home-made γ-Al 2 O 3 nanopowders that can be produced via an additive-free homogeneous-precipitation method.

Oct 8, 2021 · The article analyzes the main methods for obtaining transparent polycrystalline ceramics from Al 2 O 3 by hot pressing, hot isostatic pressing and spark plasma sintering (SPS).

Transparent YAG-Al2O3 composite nanoceramics. a Bright field TEM micrograph showing the nanometer-scale microstructure of the fully crystallized material (scale bar corresponds to 100...

Sep 1, 2004 · A ceramic process coupling slip-casting of nanopowder suspensions and Spark Plasma Sintering (SPS) was used to prepare highly transparent Nd:Lu2O3 ceramic without any sintering aids.

Feb 7, 2009 · The microstructure and transparent properties of sintered alpha-Al2O3 ceramics were investigated. The transparent submicrometer alpha-Al2O3 ceramics were obtained by pressureless sintering in air at 1400 degree C for 2 h.

Oct 1, 2024 · As a result, the geometrically complex Al 2 O 3 transparent parts manufactured in this study exhibit a uniform microstructure, high density (∼99 %), and a linear transmittance of 16 % at 490 μm.

In this work, YAG–Al 2 O 3 nanocrystalline transparent ceramics with a concentration of Nd 3+ (0–5.0 at%) were fabricated via amorphous crystallization, and the crystal structure evolution, morphology, and optical properties were systematically investigated by differential scanning calorimetry (DSC), X-ray powder diffraction (XRD ...

Mar 15, 2013 · Using discrete, ultrafine alumina, highly dense transparent (71% real in-line transmission, RIT, λ = 640 nm) ceramics were achieved with grain size as small as 260 nm using standard SPS sintering. We show that use of La 3+ as a dopant greatly reduces sensitivity to the sintering temperatures.