Reticulated Open-Celled Zinc Oxide Ceramic Foams: Manufacturing, Microstructure, Mechanical, and Thermal Properties

Table 1

Phase and elemental composition of open-celled zinc oxide ceramic foams determined by powder XRD with Rietveld analysis and a comparative EDS measurement.

Phase composition (Rietveld)
Phase (wt.%)	ZnO	α-Zn7Sb2O12	β-Bi2O3
ZnO 20 ppi	89.0 ± 0.14	10.3 ± 0.04	0.7 ± 0.01
Elemental composition (calculated from Rietveld results)
Element (wt.% ‖ at.%)	Zn	O	Sb	Bi	Al
ZnO 20 ppi	76.6 ‖ 47.6	20.0 ‖ 50.8	2.4 ‖ 0.8	0.6 ‖ 0.1	0.4 ‖ 0.7
Starting powder^#	75.4 ‖ 48.2	19.3 ‖ 50.3	2.8 ‖ 1.0	2.5 ‖ 0.5	-/-
Elemental composition (EDS measurement)
ZnO 20 ppi	78.1 ‖ 52.2	16.5 ‖ 45.0	2.9 ‖ 1.1	1.7 ‖ 0.4	0.8 ‖ 1.3

^#Calculated for the initial powder mixture of 93.9 wt.% ZnO, 3.4 wt.% Sb₂O₃, and 2.7 wt.% Bi₂O₃.