Figures & data
Table 1. The chemical composition of the raw materials (wt.%).
Table 2. The designed sintering parameters of samples.
Figure 3. The physical properties of samples with different sintering temperatures: (a) apparent porosity and total porosity, (b) bulk density and water absorption.
![Figure 3. The physical properties of samples with different sintering temperatures: (a) apparent porosity and total porosity, (b) bulk density and water absorption.](/cms/asset/9b6da324-075d-4f98-b317-d23058194fa6/tace_a_2325747_f0003_oc.jpg)
Figure 4. Pore morphology and pore size distribution of samples with different sintering temperatures: (a) 1110°C, (b) 1125°C, (c) 1140°C, (d) 1155°C, (e) 1170°C, (f) pore size distribution.
![Figure 4. Pore morphology and pore size distribution of samples with different sintering temperatures: (a) 1110°C, (b) 1125°C, (c) 1140°C, (d) 1155°C, (e) 1170°C, (f) pore size distribution.](/cms/asset/f7e0fbf0-a0fb-41f3-8b17-04ec7c1c8099/tace_a_2325747_f0004_oc.jpg)
Figure 6. The physical properties of samples with different holding times: (a) total porosity and apparent porosity, (b) bulk density and water absorption.
![Figure 6. The physical properties of samples with different holding times: (a) total porosity and apparent porosity, (b) bulk density and water absorption.](/cms/asset/7223d6f5-1930-4791-a4d7-0a9fba12f30f/tace_a_2325747_f0006_oc.jpg)
Figure 7. Pore morphology and SEM images of samples with different holding times: (a) 20 min, (b) and (e) 40 min, (c) 60 min, (d) and (f) 80 min.
![Figure 7. Pore morphology and SEM images of samples with different holding times: (a) 20 min, (b) and (e) 40 min, (c) 60 min, (d) and (f) 80 min.](/cms/asset/366b5b1c-b690-4dc8-a0eb-d5a7394eb8d5/tace_a_2325747_f0007_b.gif)
Figure 10. Pore morphology and average pore size of samples with different heating rates: (a)1°C/min, (b) 2°C/min, (c) 4°C/min, (d) 8°C/min, (e) average pore.
![Figure 10. Pore morphology and average pore size of samples with different heating rates: (a)1°C/min, (b) 2°C/min, (c) 4°C/min, (d) 8°C/min, (e) average pore.](/cms/asset/9de51b8d-a2ec-4f5f-8d87-e3b5cd35e737/tace_a_2325747_f0010_oc.jpg)
Figure 11. The Fe2P XPS spectra of samples at 8°C/min: (a) bottom of the sample, (b) top of the sample.
![Figure 11. The Fe2P XPS spectra of samples at 8°C/min: (a) bottom of the sample, (b) top of the sample.](/cms/asset/104f4078-7e50-4a4f-86b6-92ffc9aef683/tace_a_2325747_f0011_oc.jpg)