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In recent years , as people of Dental Materials and biological requirements increased, titanium porcelain technology has made great progress . However, due to the titanium / ceramic bond strength still less than nickel-chromium alloy and porcelain bonding strength , as well as higher production costs and other reasons, the use of titanium porcelain severely limited . In this study, the development of bonded porcelain and titanium surface treatment two -pronged approach to address the titanium / ceramic bonding strength of the problem, as soon as possible to carry out extensive titanium porcelain in clinical technology foundation . Titanium is titanium porcelain porcelain bonding system, the basic component of the titanium / ceramic bonding strength plays a vital role in the improvement . Experiments show that the strength of bonding porcelain shortage is leading titanium / ceramic bonding strength can not be achieved with nickel-chromium alloy porcelain bonding strength of the reasons. Porcelain bonded primary role is to control excessive oxidation of titanium and titanium substrate can be produced with a strong chemical bond . Accordingly, the experiment worked out the design principles of bonded porcelain and selected each melt reactive protection mechanisms . According to the standard free energy of oxide and the relationship between temperature , integrated ceramic bonding wettability of titanium , ceramic adhesive viscosity , expansion coefficient , mechanical properties and chemical stability considerations , initial selection of the main bonding porcelain components , the use of high-temperature solid-state reaction method, after repeated screening experiments , prepared GGW bonded porcelain . GGW bonded porcelain is SiO 2 , B 2 O 3 and Al 2 O 3 < / sub> for the network forming agent to Na 2 O, K 2 O, BaO is
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