Crystallization and sinterability of glass-ceramics in the system La2O3–SrO–B2O3

Evaluation to the effect of B2O3–La2O3–SrO–Na2O–Al2O3 bonding agent on Ti6Al4V–porcelain bonding

“…And those changes have great influences on the Ti6Al4V-porcelains bond strength. T g has the positive correlation with melting temperature of borate glass [20]. In Table 1, with the addition of Na 2 O, the T g has a decreasing trend, which has positive effect on protecting Ti6Al4V alloy at high temperature due to no excessive oxidation of Ti.…”

“…The chemical composition of the bonding agents is of great importance, because it determines the interfacial characteristics of titanium-porcelain and the mechanical performance of titanium-porcelain restorations [14,15]. Borate bonding agents, considered as a kind of glass-ceramics, have great potentials in improving Ti-porcelain bonding because of their low thermal expansion, high abrasion resistance and chemical resistance [15,20]. However, those borate glass-ceramics, such as La 2 O 3 -CaO-B 2 O 3 system and La 2 O 3 -SrO-B 2 O 3 system, all have higher glass transition temperature (T g ) and crystallization temperature (T p ) [20,23].…”

“…Borate bonding agents, considered as a kind of glass-ceramics, have great potentials in improving Ti-porcelain bonding because of their low thermal expansion, high abrasion resistance and chemical resistance [15,20]. However, those borate glass-ceramics, such as La 2 O 3 -CaO-B 2 O 3 system and La 2 O 3 -SrO-B 2 O 3 system, all have higher glass transition temperature (T g ) and crystallization temperature (T p ) [20,23]. Na 2 O and Al 2 O 3 are all important compositions to SiO 2 -based bonding agent in adjusting thermal properties and mechanical performance [14,16,39].…”

“…Therefore, the aim of this study was to investigate the effect of compositions and crystallization property of B 2 O 3 -La 2 O 3 -SrO-Na 2 O-Al 2 O 3 system on Ti6Al4V alloy-ceramics bond strength. [20] Analytical reagent H 3 BO 3 (99.5%), SrCO 3 (99%), Na 2 CO 3 (99.8%), Al 2 O 3 (99%) and La 2 O 3 (99.99%) (Sinopharm chemical reagent Co., Ltd) were mixed and homogenized in the planetary ball mill (QM-3SP2, NanDa) with the frequency of 30 Hz for 10 min. The mixture was then placed in a graphite crucible (internal dimension of Φ40×50 mm, Jinpeng) in a homemade muffle furnace (KSL 1400X A2, Kejing) at 1200 °C for 60 min with nitrogen atmosphere (99.99%).…”

“…Also, B 2 O 3 -based bonding agents have many practices in research and commercial applications. With relatively lower fusing temperature [20], ternary systems of La 2 O 3 -CaO-B 2 O 3 [21][22][23], [20,24] and La 2 O 3 -BaO-B 2 O 3 [25] have been widely investigated in the field of nonlinear optical materials. Their crystallization behavior is alterable based on the change of compositions.…”