Glass-crystalline materials in the system P2O5–CaO–ZnO–Ti

Abstract

Calcium-phosphate ceramic and glasses in combination with titanium and titanium alloys could be successfully used in clinical practice. In the present work the interaction between titanium and phosphate glasses from the system P2O5–CaO–ZnO is investigated. The precursors used are NH4H2PO4, CaCO3, ZnO and Ti. The initial glasses in the system P2O5–CaO–ZnO are synthesized by melting in corundum crucibles. The thermal treatment of samples is performed in the temperature range from 800 to 1250°C for 20 min prepared by several variants of contact between initial phases: (i) homogenized mixture of glassy powder and titanium powder; (ii) a monolithic glass in contact with titanium plate; (iii) packets from bulk titanium substrate and powdered phosphate glass mixed with Ti or Ca3(PO4)2. For the characterization of the specimens the following methods are used: X-ray diffraction (XRD), infrared (IR) spectroscopy and transmission electron microscopy (TEM). It is established that the obtained final products present glass-crystalline polyphase materials containing different crystal phosphates, titanium phosphide, TiO2, TiO and titanium. As a result of the solid state reaction between the metal and phosphate glass a transition region is found. The applied technique of preparation is an initial step towards the development of gradient materials with controlled properties.