ANALYTICAL METHODS APPLICABLE TO ZIRCONIA OXIDE AND BORON-SILICON REFRACTORIES
Abstract
A complete evaluation of the analytical methods employed in the analyses of zirconia-magnesia refractoies and of boron-silicon mixtures is presented. Also presented is the analytical data of submitted samples. Preferred methods of analyses for ZrO2.MgO refractories are: (1) For ZrO2, precipitation by mandelic acid. (2) silica by silico-molybdate colorimetry. (3) MgO by phosphate. (4) For the determination of free MgO, a method of short digestion period followed by EDTA (disodium ethylene diamine tetracetate) titration s recommended. Methods found suitable for analysis of the boron-silicon system are: (1) Si by sodium carbonate-nitrate fusion and dehydration as silicic acid. (2) B by a similar fusion, precipitation of Si, and titration of Boric Acid. 3) N by a caustic fusion and determination as NH3.(4) O by fluorination and measurement of the released gas. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1961
- Accession Number
- AD0275506
Entities
People
- C.h. Drummond
- M.t. Watson
- Paul T. Close
Organizations
- Owens-Illinois