Assertion: periclase | /r/HasAspect | a purity of at least about 95%
Facets:
Source sentences:
text: In the production of refractory masses the step which comprises, thoroughly mixing with a major portion of non-acid aggregate material, a 0 minor portion of bond forming magnesia having a purity of at least about 95% and a particle size substantially entirely below 50 microns with a substantial fraction below 10 microns, and a minor portion of bond forming silica having a 5 purity of at least about 95%, and a particle size substantially entirely below 50 microns with a substantial fraction below 10 microns and with a specific surface of at least about 6000 sq.
text: , and a minor portion of bond forming magnesia having a purity of at least about 95%, and a particle size substantially entirely below 50 microns with a substantial fraction below 10 microns in fineness, there being from 1.34 to 10 parts by weight of magnesia to 1 of silica.