摘要:
A low-fusing temperature porcelain compositions, methods of use thereof on metal or porcelain substrates to form dental prostheses and kits therefor. Compositions of the invention have a fusing temperature of less than 800.degree. C. and a coefficient of thermal expansion compatible with a substrate of metal or ceramic. Each composition includes, in weight percent of the composition, from 40 to 65 percent by weight SiO.sub.2, from 6 to 12 percent by weight Al.sub.2 O.sub.3, from 6 to 12 percent by weight Na.sub.2 O, from 5.5 to 10.50 percent by weight K.sub.2 O, from 1 to 3 percent by weight Li.sub.2 O, from 0.8 to 2.5 percent by weight CaO, from 0.8 to 4.0 percent by weight B.sub.2 O.sub.3 and from 0.1 to 0.8 percent by weight CeO.sub.2.
摘要翻译:低熔点瓷器组合物,其在金属或瓷基材上的使用方法,以形成牙科假体及其试剂盒。 本发明的组合物具有小于800℃的熔化温度和与金属或陶瓷的基材相容的热膨胀系数。 每种组合物包含按组合物重量百分比计为40至65重量%的SiO 2,6至12重量%的Al 2 O 3,6至12重量%的Na 2 O,5.5至10.50重量%的K 2 O,1至 3重量%的Li 2 O,0.8〜2.5重量%的CaO,0.8〜4.0重量%的B 2 O 3和0.1〜0.8重量%的CeO 2。
摘要:
A method and apparatus for filling preforms with resin or slurry includes a tank for holding the slurry and an autoclave for holding the preforms. The tank and autoclave have a common vacuum system connected thereto, and the tank is disposed above the autoclave. This arrangement provides a compact casting system which utilizes a vacuum and gravity to transfer slurry from the tank to the preforms within the autoclave.
摘要:
A low-fusing temperature porcelain composition for use in dental prostheses is disclosed having a fusing temperature of about 700.degree. C..+-.50.degree. C. and a coefficient of thermal expansion compatible with a substrate of metal or ceramic. The composition includes, in weight percent of the composition, SiO.sub.2 at 57-61, Al.sub.2 O.sub.3 at 6.5-11.5, Na.sub.2 O at 10-11, K.sub.2 O at 8-16, Li.sub.2 O at 1-3, CaO at 1.5-4, BaO at 1.5-2.5, CeO.sub.2 at 0.5-2, and Tb.sub.2 O.sub.3 at 0.5-2.