发明授权
US06297181B1 Barium-free, X-ray-opaque dental glass and dental glass/polymer composite, and the use thereof 有权
无钡,X射线不透明牙科玻璃和牙科玻璃/聚合物复合材料及其用途

Barium-free, X-ray-opaque dental glass and dental glass/polymer composite, and the use thereof
摘要:
The invention relates to a barium-free, X-ray-opaque dental glass, to a dental glass/polymer composite comprising the glass, and to the use thereof as dental filling, where the dental glass has the following composition (in % by weight): SiO2 20-45, Al2O3 5-35, B2O3 1-10, Na2O 1-10, K2O 0-8, Cs2O 0-8, sum all alkali metal oxides 1-15, CaO 0-8, SrO 0-27, ZnO 2-20, ZrO2 2-10, P2O5 0-10, La2O3 0-10, F 2-20, the total content of B2O3, ZnO, ZrO2 and La2O3 is >20% by weight, and the refractive index nd of the dental glass is in the range from 1.47 to 1.70.
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