Abstract
This work examines the reinforcement of reaction-hardening phosphate materials (phosphate cements) for bone implants based on isomorphically cation-(Na+, K+) and anion-( \({\text{SiO}}_{4}^{{4 - }}\) , \({\text{SO}}_{4}^{2}\) ) substituted tricalcium phosphate (β and α-TCP, Ca3(PO4)2), which are reinforced with silicate (basalt-based) fiberglass. The resulting materials were characterized by XRD and SEM methods, mechanical compression tests were carried out, the setting times of cements were determined, and changes in the pH of aqueous medium in contact with the cements under study were measured. Analysis of microstructure showed that the reinforcing fiber surface, upon contact with the matrix of hardening cement, is partially corroded with the formation of phosphate microparticles on it. Using the pH-metry method, it was found that samples with prolonged contact to water do not significantly change the value of the pH of the aqueous environment, which remains close to the neutral range from 5 to 7.5, favorable for further biological tests.
