Assertion: periclase | /r/MadeOf | chromium oxide
Facets:
Source sentences:
text: This patent does not teach that it is necessary for the manufacture of refractories from mixtures of substances that furnish magnesia and substances that contain chromium oxide to use for the preparation of the sintered material minimum burning temperatures of 1700 C., at least 65% of the substances containing chromium oxide having a particle size greater than 0.12 mm.