Preparation of YSZ porous ceramics with precise porosity control

Abstract

Conventional preparation of porous ceramics often hard to accurately control the porosity of the samples. In this paper, by improving the foaming method, the foaming process is placed in the limited space of the ball mill tank, and YSZ porous ceramics with different porosity are obtained by changing the amount of slurry. Initial results showed that the porosity of the sample varies linearly with the increasing of addition of slurry. From the microscopic morphology, it can be seen that the increase in slurry content will reduce the number of pore with little changed size, which lead to the decrease in porosity. Therefore, with simple calculation YSZ porous ceramics with 85%, 80%, 75%, 70%, and 65% porosity can be obtained using the method of foaming in limited space by ball milling. K E Y W O R D Sball milling, foaming, porosity, porous materials How to cite this article: Lang Y, Tian C-J, Dai X, Wang C-A. Preparation of YSZ porous ceramics with precise porosity control. Int J Appl Ceram Technol. 2020;17:974-979. https ://doi.org/10.1111/ijac.13431

Experimental-theoretical comparative analysis of PLA-based 3D lattice

“…The micromechanical modeling of porous polycrystalline ceramics under different loadings shows two fracture initiation mechanisms due to stress concentration at the pore boundary. 22 Deformation was analyzed under tension and compression. The scientists found that polycrystalline ceramic material splits mostly intergranular due to the grain boundary’s lower fracture toughness than the grains.…”

Strength Analysis of Porous YSZ Ceramics With the Same Porosity and Different Pore Structure

“…Limited volume foaming process is a preparation technology of porous ceramics which can accurately control the porosity of samples [1]. The foaming is limited in the ball milling tank, and the space in the ball milling tank is…”

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Porous YSZ ceramics with different pore structure were prepared by volume limiting foaming technology. Accurate porosity could achieve by this technology [1], so all samples were adjusted to density of 1g/m 3 (porosity of about 82.6%). For the same density, the in uence of porosity change on the strength was excluded.

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Analysis of mechanical properties of a lattice structure produced with the additive technology

“…Lang et al [17] dealt with construction of YSZ porous ceramics with precise porosity control. Current preparation of porous ceramics usually hard to exactly control the porosity of the samples.…”