Abstract
This chapter discusses phosphate-bonded ceramics, and cements and phosphate-bonded dental cements. The chapter also provides an overview of magnesium phosphate ceramics. Unlike silicophosphate cements, magnesium phosphates are highly crystalline, and hence they may be appropriately called room-temperature-setting ceramics rather than cements. Various magnesium phosphate-based ceramics have been developed for use in structural materials. These include magnesium ammonium phosphate ceramic grout for rapid repair of roads in cold regions, and for repair of industrial floors and airport runways; and magnesium potassium phosphate ceramics for stabilization and solidification of low-level radioactive and hazardous wastes. The chapter also explores the generalization of formation of chemically bonded phosphate ceramics (CBPCs). When a partially neutralized phosphoric acid solution is reacted with a metal oxide, a ceramic formed with a reaction product MxBy(PO4)(x+y)/3, where M stands for a metal, and B can be hydrogen (H) or another metal such as aluminum (Al). The phosphoric acid in these reactions is partially neutralized by dilution or by reaction of an oxide of B.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
