By Nigel Seaton, Francisco R Reinoso, Philip Llewellyn, Stefan Kaskel

Pore accessibility in nanoporous carbons: scan, idea and simulation -- Characterization measurements of universal reference nanoporous fabrics by way of gasoline adsorption

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The sensors had a long term stability of up to two years. 68 g cm−3, melting point of 2715 °C, and boiling point of 4300 °C, has been widely used because of its exceptional mechanical and functional properties, such as high toughness, high oxygen diffusivity, and low thermal conductivity. Based on these properties, transparent ZrO2 ceramics, especially yttria-stabilized zirconia or YSZ, have been extensively and widely investigated. The introduction of yttria can stabilize the cubic or tetragonal structure of zirconia with the presence oxygen vacancies, as shown in phase diagram in Fig.

Weak absorption is a major problem for pumping Tm3+ in the visible and infrared region, which can be sensitized by using 3d ions such as Cr3+ or Fe3+. The visible emission from Tm3+ can be excited by upconversion processes, especially the Yb-sensitized upconversion. Yb3+ Ion The ground electronic configuration of Yb3+ is 4f13, which has only two manifolds, 2F7/2 at ground and 2F5/2 in the region of 10,000 cm−1. Such a configuration precludes emission self-quenching through cross-relaxation or excited state absorption.

In this case, commercial alumina powder could be consolidated at 1150 °C at a heating 34 2 Transparent Ceramic Materials rate of 100 °C min−1. The effects of the pressure application mode were examined, in terms of microstructure, porosity, and optical transparency. Two ways of application of pressure were compared. In the first case, a constant pressure of 80 MPa was applied for the entire duration of the sintering process, which was called constant pressure. , two-step pressure. The application of two-step pressure allowed for homogeneously densified translucent alumina ceramics at a high heating rate.

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