Ferric oxide sintered polycrystalline

Fig. 11. Contact area between a single-crystal magnesium oxide sphere and the polycrystalline plate of ferric oxide sintered at 1226°C for 6 hr. Bright field illumination, 400 x.

Fig. 2. Polycrystalline nickel oxide sphere sintered to polycrystalline ferric oxide sphere plate at 1160 C for 23 hr. Polarized light, 100 x. 

Magnesium Oxide-Ferric Oxide System. In these experiments either magnesium oxide single-crystal spheres of 1 mm diameter were sintered to polycrystalline ferric oxide plates or ferric oxide polycrystalline spheres were sintered to single-crystal blocks of magnesium, oxide. In general the results were similar to those obtained in the nickel oxide-ferric oxide system. 

Fig. 7. Polycrystalline ferric oxide sphere sintered to a single crystal of magnesium oxide at 1090°C for 51 hr. The sphere was held in position by nickel foil visible in the upper part of the photograph. Polarized light, 100 x.

Fig. 14. Polycrystalline ferric oxide spheres sintered to polycrystalline zinc oxide plate at 1136°C for 32.5 hr. Note dark layer of ferrite formed on the surface of ferric oxide particles. Polarized light, 100 X.

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See also in sourсe #XX -- [ , , ]

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