High-strength, translucent mica glass-ceramics
    7.
    发明授权
    High-strength, translucent mica glass-ceramics 失效
    高强度半透明云母玻璃陶瓷

    公开(公告)号:US6080692A

    公开(公告)日:2000-06-27

    申请号:US952464

    申请日:1998-02-18

    摘要: The invention relates to a glass ceramic in which mica and ZrO.sub.2 are present in crystallized form, containing:K.sub.2 O: 0-9% by weightNa.sub.2 O: 0-9% by weight with the condition that Na.sub.2 O and K.sub.2 O together make up at least about 4% by weight,SiO.sub.2 : 35-60% by weightMgO: 10-25% by weightAl.sub.2 O.sub.3 : 7-30% by weightZrO2: 4-12% by weightF.sup.- : 2-10% by weight which is essentially free of lithium, calcium, strontium and barium, to a process for its production and to its use as a tooth replacement.

    摘要翻译: PCT No.PCT / DE97 / 00504 Sec。 371日期1998年2月18日 102(e)1998年2月18日PCT PCT 1997年3月13日PCT公布。 第WO97 / 34847号公报 日期1997年9月25日本发明涉及一种玻璃陶瓷,其中云母和ZrO 2以结晶形式存在,其含有:K 2 O:0-9重量%Na 2 O:0-9重量%,条件是Na 2 O和K 2 O一起制备 至少约4重量%,SiO 2:35-60重量%MgO:10-25重量%Al 2 O 3:7-30重量%ZrO 2:4-12重量%F-:2-10重量% 其基本上不含锂,钙,锶和钡,用于其生产和用作牙齿替代物的过程。

    Two-phase dental forcelain composition
    9.
    发明授权
    Two-phase dental forcelain composition 失效
    两相牙科瓷组成

    公开(公告)号:US5653791A

    公开(公告)日:1997-08-05

    申请号:US614044

    申请日:1996-03-12

    摘要: A two-phase porcelain composition for dental restorations comprising a leucite crystallite phase dispersed in a feldspathic glass matrix, a maturing temperature of from about 750.degree. to about 1050.degree. C. and a coefficient of thermal expansion of from about 12.times.10.sup.-6 /.degree.C. to about 17.5.times.10.sup.-6 /.degree.C., said porcelain composition comprising:______________________________________ Component Amount (wt. %) ______________________________________ SiO.sub.2 57-66 Al.sub.2 O.sub.3 7-15 K.sub.2 O 7-15 Na.sub.2 O 7-12 Li.sub.2 O 0.5-3 CaO 0-3 MgO 0-7 F 0-4 CeO.sub.2 0-1 ______________________________________ wherein the leucite crystallites possess diameters not exceeding about 10 microns and represent from about 5 to about 65 weight percent of the two-phase porcelain composition.

    摘要翻译: 一种用于牙科修复体的两相瓷组合物,其包含分散在长石玻璃基质中的白云石微晶相,熟化温度为约750℃至约1050℃,热膨胀系数为约12×10 -6 /℃ 至约17.5×10 -6 /℃,所述瓷组合物包含: - 组分量(wt。%) - SiO2 57-66-Al2O3 7-15-K2O 7-15-Na2O 7-12-Li2O 0.5-3 - CaO 0-3 - MgO 0-7 - F 0-4 - CeO2 0-1 - 其中白云石微晶的直径不超过约10微米,代表两相瓷组合物的约5至约65重量%。