Abstract To enhance the mechanical properties and thermal stability of ZrO 2 porous ceramics for electronic atomization applications, this study utilized 3Y-ZrO 2 as the matrix material and incorporated Al 2 O 3 doping to fabricate composite porous ceramics. The microstructural morphology and thermodynamic properties were systematically investigated. The results demonstrated that as the Al 2 O 3 content increased, the pore structure evolved through a sequence of “slit-shaped pores - transitional pores - independent circular pores”. Specifically, the porosity initially decreased and subsequently increased, while the linear shrinkage, compressive strength, and thermal conductivity all exhibited an initial rise followed by a decline. Optimal performance was achieved at 6 wt.% Al 2 O 3 content, with the sample displaying a porosity of 63.55%, linear shrinkage of 13.62%, compressive strength of 6.88 MPa, and thermal conductivity of 0.17 W/m·K. Additionally, its pore size exhibited a gradient distribution across three distinct ranges: 4-10 μm, 600-100 nm, and 200-500 nm.
Li et al. (Fri,) studied this question.