公开(公告)号：US4533968A

公开(公告)日：1985-08-06

申请号：US428510

申请日：1982-09-29

申请人： Tuneo Yoshida ,  Kengo Oishi ,  Motohiko Yagi

发明人： Tuneo Yoshida ,  Kengo Oishi ,  Motohiko Yagi

IPC分类号： C04B35/46 ,  B65H23/00 ,  C04B35/468 ,  G11B15/60

CPC分类号： G11B15/60 ,  C04B35/4682

摘要： A ceramic guide for tape-like materials such as magnetic recording tapes, movie films, and microfilms, and a process for producing such ceramic guides are described. The ceramic guide is a sintered product of (A) 98 to 93 parts by weight of barium titanate, (B) 2 to 7 parts by weight of a silicate inorganic binder, and (C) 0.2 to 2 parts by weight, per 100 parts by weight of (A) and (B), of lanthanum oxide. The ceramic guide meets the requirements for guides for use in, e.g., small sized video cassettes, is non-magnetic, electrically conductive and has anti-static properties and, therefore, it does not generate static charge and has a low coefficient of friction during running of tape-like materials in contact therewith.

摘要翻译： 描述了用于诸如磁记录带，电影胶片和微缩胶片的带状材料的陶瓷导向器，以及用于制造这种陶瓷导向件的方法。 陶瓷导向件是（A）98〜93重量份钛酸钡，（B）2〜7重量份硅酸盐无机粘合剂，（C）每100重量份0.2〜2重量份的烧结体 （A）和（B））氧化镧。 陶瓷导轨符合用于例如小尺寸录像带的导轨的要求，是非磁性的，导电的并具有防静电性能，因此，它不产生静电荷并且具有低摩擦系数 与其接触的带状材料的运行。

公开(公告)号：US4366253A

公开(公告)日：1982-12-28

申请号：US176837

申请日：1980-08-11

申请人： Motohiko Yagi

发明人： Motohiko Yagi

IPC分类号： A61K6/02 ,  A61L27/00 ,  C03C3/064 ,  C03C3/076 ,  C03C10/00 ,  C03C10/02 ,  C03C3/04 ,  C03C3/08

CPC分类号： C03C3/064 ,  C03C10/00

摘要： Phosphate glass compositions are described comprising from 8 to 35 wt % P.sub.2 O.sub.5, from 8 to 48 wt % SiO.sub.2 and GeO.sub.2, provided that the GeO content is not more than 6 wt %, from 3 to 18 wt % B.sub.2 O.sub.3, from 16 to 28 wt % Al.sub.2 O.sub.3, and from 8 to 33 wt % CaO, MgO, SrO, and BaO, provided that the sum of the MgO, SrO, and BaO contents is not more than 15 wt %, andwherein the sum of the above-described oxides comprises at least 88 wt % of the total composition and the ratio of the sum of the CaO, MgO, SrO and BaO contents to the P.sub.2 O.sub.5 content ranges from 0.6/1 to 1.4/1 and wherein the amount of alkali metal oxide is less than 1%,certain of said compositions can be converted to a glass-ceramic material by a thermal treatment for crystallization which includes the steps, in sequence, of (1) melting a glass composition, (2) molding the melted glass composition, (3) cooling the resulting molded composition to its transformation temperature or less, and (4) allowing phosphate crystal to separate out as a main crystal phase by a re-heating treatment under conditions such that the molded shape is retained.

摘要翻译： 描述了磷酸盐玻璃组合物，其包含8至35重量％的P 2 O 5，8至48重量％的SiO 2和GeO 2，条件是GeO含量不超过6重量％，3至18重量％的B 2 O 3，16至28重量％ ％Al 2 O 3和8〜33重量％的CaO，MgO，SrO和BaO，条件是MgO，SrO和BaO含量之和不大于15重量％，其中上述氧化物 占总组合物的至少88重量％，CaO，MgO，SrO和BaO与BaO含量之和的比例为0.6 / 1至1.4 / 1，其中碱金属氧化物的量小于 1％，通过热处理结晶可将某些所述组合物转化成玻璃陶瓷材料，其包括以下步骤：（1）熔化玻璃组合物，（2）将熔融的玻璃组合物成型，（3） ）将所得模塑组合物冷却至其转变温度或更低，和（4）允许磷酸盐晶体作为主要分离 在保持模塑形状的条件下通过再加热处理。