-
1.发明授权Semiconductive ceramic materials with a voltage-dependent nonlinear resistance, and process for preparation 失效具有电压依赖性非线性电阻的半导体陶瓷材料及其制备方法
公开(公告)号：US4438214A
公开(公告)日：1984-03-20
申请号：US441219
申请日：1982-11-12
摘要： Semiconductive ceramic materials suitable for use in varistors, consisting essentially of a major proportion of Sr.sub.(1-x) Ca.sub.x TiO.sub.3, where x is from about 0.01 to about 0.50, the balance being at least one of Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5, WO.sub.3, La.sub.2 O.sub.3, CeO.sub.2, Nd.sub.2 O.sub.3, Y.sub.2 O.sub.3, Sm.sub.2 O.sub.3, Pr.sub.6 O.sub.11 and Dy.sub.2 O.sub.3, and Na.sub.2 O. The ceramic materials may further comprise a minor proportion of at least one of Ag.sub.2 O, CuO, MnO.sub.2 and SiO.sub.2, and/or a minor proportion of Al.sub.2 O.sub.3. For the fabrication of ceramic bodies of the above compositions there are prepared mixtures of the noted ingredients in powdered form in various possible combinations, plus an organic binder. The mixtures are molded under pressure into desired shape. The moldings are first fired in a reductive or neutral atmosphere and then refired in an oxidative atmosphere. Na.sub.2 O can be included in the initial mixtures in the form of Na.sub.2 O itself and/or other Na compound such as NaF. Alternatively, either Na.sub.2 O itself or NaF is pasted and coated on the moldings after the initial firing thereof. The subsequent refiring of the coated moldings causes thermal diffusion of Na.sub.2 O therein.
摘要翻译： 适用于压敏电阻的半导体陶瓷材料，主要由Sr（1-x）CaxTiO3组成，其中x为约0.01至约0.50，余量为Nb2O5，Ta2O5，WO3，La2O3，CeO2中的至少一种 ，Nd2O3，Y2O3，Sm2O3，Pr6O11和Dy2O3，以及Na2O。 陶瓷材料还可以包含少量的Ag 2 O，CuO，MnO 2和SiO 2中的至少一种和/或少量的Al 2 O 3。 对于上述组合物的陶瓷体的制造，可以以各种可能的组合加上有机粘合剂制备粉末形式的所述成分的混合物。 将混合物在压力下成型为所需形状。 模制品首先在还原性或中性气氛中燃烧，然后在氧化性气氛中被引燃。 Na 2 O可以以Na 2 O本身和/或其它Na化合物如NaF的形式包含在初始混合物中。 或者，Na2O本身或NaF在其初始烧制之后被粘贴并涂覆在模制品上。 涂覆的模制品的随后的再注入导致Na 2 O在其中的热扩散。
-
2.发明授权Semiconductive ceramic materials with a voltage-dependent nonlinear resistance 失效具有电压依赖性非线性电阻的半导体陶瓷材料
公开(公告)号：US4547314A
公开(公告)日：1985-10-15
申请号：US507550
申请日：1983-06-24
摘要： Ceramic materials suitable for use in varistors, enabling the same to function not only as such but also as capacitors. The ceramic materials comprise a major proportion of SrTiO.sub.3, the balance being: (1) at least one of Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5, WO.sub.3, La.sub.2 O.sub.3, CeO.sub.2, Nd.sub.2 O.sub.3, Y.sub.2 O.sub.3, Pr.sub.6 O.sub.11, Sm.sub.2 O.sub.3, Eu.sub.2 O.sub.3, and Dy.sub.2 O.sub.3, for making the materials semiconductive; (2) Na.sub.2 O, for making surge-proof the varistors made from the ceramic materials and for improving their nonlinearity coefficients; and (3) Al.sub.2 O.sub.3, for improving the temperature dependences of the varistor voltages, as well as nonlinearity coefficients, of the varistors. Optionally the ceramic materials may further contain one or more of Ag.sub.2 O, CuO, MnO.sub.2, and SiO.sub.2, for still higher nonlinearity coefficients. Containing Al.sub.2 O.sub.3 in proportions ranging from 0.01 to 1.50 mole parts with respect to 100 mole parts of SrTiO.sub.3, the ceramic compositions make possible the provision of varistors having varistor voltages that hardly change in a temperature range as wide as, for example, from -40.degree. to +120.degree. C.
摘要翻译： 陶瓷材料适用于压敏电阻，使其不仅能够像电容器一样起作用。 陶瓷材料主要成分为SrTiO3，其余为：（1）Nb2O5，Ta2O5，WO3，La2O3，CeO2，Nd2O3，Y2O3，Pr6O11，Sm2O3，Eu2O3和Dy2O3中的至少一种，用于制造半导体材料; （2）Na2O，用于防止由陶瓷材料制成的压敏电阻，并提高其非线性系数; 和（3）Al2O3，用于改善压敏电阻的压敏电阻电压的温度依赖性以及非线性系数。 任选地，对于更高的非线性系数，陶瓷材料还可以含有一种或多种Ag 2 O，CuO，MnO 2和SiO 2。 相对于100摩尔份的SrTiO 3，含有0.01〜1.50摩尔份的Al 2 O 3的陶瓷组合物能够提供具有在例如-40℃以下的温度范围内难以变化的压敏电阻的压敏电阻 至+120℃
-
公开(公告)号：US4545929A
公开(公告)日：1985-10-08
申请号：US398193
申请日：1982-07-14
摘要： Ceramic materials suitable for use in varistors, consisting essentially of a major proportion of SrTiO.sub.3, the balance being (1) at least one of Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5, WO.sub.3, La.sub.2 O.sub.3, CeO.sub.2, Nd.sub.2 O.sub.3, Y.sub.2 O.sub.3, Sm.sub.2 O.sub.3, Pr.sub.6 O.sub.11, Eu.sub.2 O.sub.3, and Dy.sub.2 O.sub.3, for making the materials semiconductive, and (2) Na.sub.2 O, for making surge-proof the varistors made from the ceramic materials. As desired, the compositions may further include one or more of Ag.sub.2 O, CuO, MnO.sub.2, and SiO.sub.2 for a higher nonlinearity coefficient. Containing Na.sub.2 O in proportions ranging from approximately 0.02 to 2.50 mole parts, the ceramic compositions make possible the provision of varistors suffering little from current or voltage surges in use.
摘要翻译： 适用于压敏电阻的陶瓷材料，主要由SrTiO3组成，其余为（1）Nb2O5，Ta2O5，WO3，La2O3，CeO2，Nd2O3，Y2O3，Sm2O3，Pr6O11，Eu2O3和Dy2O3中的至少一种， 用于制造材料半导体，以及（2）Na2O，用于制造由陶瓷材料制成的压敏电阻的防浪涌。 根据需要，组合物可以进一步包括Ag 2 O，CuO，MnO 2和SiO 2中的一种或多种，用于较高的非线性系数。 含有大约0.02至2.50摩尔份数的Na 2 O，陶瓷组合物可以提供在使用中几乎不受电流或电压浪涌影响的压敏电阻。
-
公开(公告)号：US4490318A
公开(公告)日：1984-12-25
申请号：US562429
申请日：1983-12-16
摘要： Semiconductive ceramic materials suitable for use in varistors, consisting essentially of a major proportion of Sr(.sub.1-x)Ca.sub.x TiO.sub.3, where x is from about 0.01 to about 0.50, the balance being at least one of Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5, WO.sub.3, La.sub.2 O.sub.3, CeO.sub.2, Nd.sub.2 O.sub.3, Y.sub.2 O.sub.3, Sm.sub.2 O.sub.3, Pr.sub.6 O.sub.11 and Dy.sub.2 O.sub.3, and Na.sub.2 O. The ceramic materials may further comprise a minor proportion of at least one of Ag.sub.2 O, CuO, MnO.sub.2 and SiO.sub.2, and/or a minor proportion of Al.sub.2 O.sub.3. For the fabrication of ceramic bodies of the above compositions there are prepared mixtures of the noted ingredients in powdered form in various possible combinations, plus an organic binder. The mixtures are molded under pressure into desired shape. The moldings are first fired in a reductive or neutral atmosphere and then refired in an oxidative atmosphere. Na.sub.2 O can be included in the initial mixtures in the form of Na.sub.2 O itself and/or other Na compound such as NaF. Alternatively, either Na.sub.2 O itself or NaF is pasted and coated on the moldings after the initial firing thereof. The subsequent refiring of the coated moldings causes thermal diffusion of Na.sub.2 O therein.
-
公开(公告)号：US4584282A
公开(公告)日：1986-04-22
申请号：US692439
申请日：1985-01-17
申请人： Kazuo Sasazawa , Nobutatsu Yamaoka
发明人： Kazuo Sasazawa , Nobutatsu Yamaoka
CPC分类号： H01G4/1245 , C04B35/49 , H01P7/10
摘要： Dielectric ceramic compositions consisting essentially of xZrO.sub.2 -yCeO.sub.2 -zSiO.sub.2 -TiO.sub.2 in which x+y+z=1 and x, y and z are represented within ranges by mole surrounded by a polygon having at its corners the points A, B, C and D of a ternary composition diagram of the attached drawing defined as follows,______________________________________x y z______________________________________A 0.98 0.01 0.01B 0.60 0.39 0.01C 0.60 0.18 0.22D 0.77 0.01 0.22______________________________________At least one oxide selected from the group consisting of Al.sub.2 O.sub.3, La.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 may be further added to the above composition in an amount of from 0.05 to 1.0 parts by weight per 100 parts by weight of the above four components.
摘要翻译： 基本上由xZrO2-yCeO2-zSiO2-TiO2组成的介电陶瓷组合物，其中x + y + z = 1和x，y和z在由多个边界包围的范围内表示，该多边形在其点的点A，B，C和 附图中的三元组成图D定义如下，-xyz -A 0.98 0.01 0.01 -B 0.60 0.39 0.01 -C 0.60 0.18 0.22 -D 0.77 0.01 0.22 - 选自Al2O3，La2O3中的至少一种氧化物 并且Cr 2 O 3可以进一步加入到上述组合物中，其量为每100重量份上述四种组分为0.05-1.0重量份。
-
6.发明授权Dielectric ceramic materials with insulated boundaries between crystal grains, and process for preparation 失效介电陶瓷材料与晶粒之间具有绝缘边界，以及制备工艺
公开(公告)号：US4405478A
公开(公告)日：1983-09-20
申请号：US443781
申请日：1982-11-22
CPC分类号： H01G4/1281 , C04B35/47
摘要： A dielectric ceramic material composed of primary and secondary ingredients forming in combination a polycrystalline ceramic proper, and of insulating substances diffused throughout the intergranular boundaries of the ceramic proper for an increase in apparent relative dielectric constant. The primary ingredients comprise, in relative proportions, 90.68-99.88 wt. % SrTiO.sub.3, 0.07-5.32 wt. % Nb.sub.2 O.sub.5, and 0.05-4.00 wt. % GeO.sub.2. The secondary ingredients comprise 0.02-0.10 wt. part SiO.sub.2 and 0.01-0.03 wt. part Al.sub.2 O.sub.3 with respect to 100 wt. parts of the primary ingredients, with the weight ratio of SiO.sub.2 to Al.sub.2 O.sub.3 being from 1.5 to 5.0. The insulating substances comprise 0.03-2.90 wt. % PbO, 0.11-4.34 wt. % Bi.sub.2 O.sub.3, and 0.001-0.18 wt. % B.sub.2 O.sub.3 with respect to the total weight of the primary and the secondary ingredients. In the fabrication of bodies of the ceramic the mixture of the insulating substances is coated or otherwise layered on polycrystalline ceramic bodies prepared from the primary and secondary ingredients. The coated ceramic bodies are then heated to cause diffusion of the insulating substances throughout their intergranular boundaries.
摘要翻译： 由主要和次要成分组成的介电陶瓷材料，其组合形成多晶陶瓷本身，并且绝缘物质在陶瓷本身的整个晶界处扩散，以增加表观相对介电常数。 主要成分以相对比例包含90.68-99.88wt。 ％SrTiO 3，0.07-5.32wt。 ％Nb2O5和0.05-4.00wt。 ％GeO2。 次要成分包含0.02-0.10wt。 部分SiO2和0.01-0.03wt。 部分Al2O3相对于100wt。 主要成分的一部分，SiO 2与Al 2 O 3的重量比为1.5-5.0。 绝缘物质包含0.03-2.90重量％ ％PbO，0.11-4.34wt。 ％Bi 2 O 3和0.001-0.18wt。 ％B2O3相对于初级和次级成分的总重量。 在陶瓷体的制造中，绝缘物质的混合物被涂覆或以其它方式分层在由初级和次级成分制备的多晶陶瓷体上。 然后将涂覆的陶瓷体加热，使绝缘物质扩散到其晶间界面。
-
7.发明授权Dielectric ceramic materials with insulated boundaries between crystal grains, and process for preparation 失效介电陶瓷材料与晶粒之间具有绝缘边界，以及制备工艺
公开(公告)号：US4405474A
公开(公告)日：1983-09-20
申请号：US443775
申请日：1982-11-22
CPC分类号： H01G4/1281 , C04B35/47
摘要： A dielectric ceramic material composed of primary and secondary ingredients forming in combination a polycrystalline ceramic proper, and of insulating substances diffused throughout the intergranular boundaries of the ceramic proper for an increase in apparent relative dielectric constant. The primary ingredients comprise in relative proportions, 96.70-99.83 wt. % SrTiO.sub.3, 0.15-2.30 wt. % WO.sub.3, and 0.02-1.00 wt. % CuO. The secondary ingredients comprise 0.02-0.10 wt %. part SiO.sub.2 and 0.01-0.03 wt. part Al.sub.2 O.sub.3 with respect to 100 wt. parts of the primary ingredients, with the weight ratio of SiO.sub.2 to Al.sub.2 O.sub.3 being from 1.5 to 5.0. The insulating substances comprise 0.003-2.83 wt. % PbO, 0.10-4.30 wt. % Bi.sub.2 O.sub.3, and 0.001-0.18 wt. % B.sub.2 O.sub.3 with respect to the total weight of the primary and the secondary ingredients. In the fabrication of bodies of the ceramic the mixture of the insulating substances is coated or otherwise layered on polycrystalline ceramic bodies prepared from the primary and secondary ingredients. The coated ceramic bodies are then heated to cause diffusion of the insulating substances throughout their intergranular boundaries.
摘要翻译： 由主要和次要成分组成的介电陶瓷材料，其组合形成多晶陶瓷本身，并且绝缘物质在陶瓷本身的整个晶界处扩散，以增加表观相对介电常数。 主要成分包括相对比例为96.70-99.83wt。 ％SrTiO 3，0.15-2.30重量％ ％WO3和0.02-1.00wt。 ％CuO。 次要成分占0.02-0.10重量％。 部分SiO2和0.01-0.03wt。 部分Al2O3相对于100wt。 主要成分的一部分，SiO 2与Al 2 O 3的重量比为1.5-5.0。 绝缘物质包含0.003-2.83wt。 ％PbO，0.10-4.30wt。 ％Bi 2 O 3和0.001-0.18wt。 ％B2O3相对于初级和次级成分的总重量。 在陶瓷体的制造中，绝缘物质的混合物被涂覆或以其它方式分层在由初级和次级成分制备的多晶陶瓷体上。 然后将涂覆的陶瓷体加热，使绝缘物质扩散到其晶间界面。
-
8.发明授权Dielectric ceramic materials with insulated boundaries between crystal grains, and process for preparation 失效介电陶瓷材料与晶粒之间具有绝缘边界，以及制备工艺
公开(公告)号：US4405472A
公开(公告)日：1983-09-20
申请号：US443773
申请日：1982-11-22
CPC分类号： C04B35/47 , H01G4/1281
摘要： A dielectric ceramic material composed of primary and secondary ingredients forming in combination a polycrystalline ceramic proper, and of insulating substances diffused throughout the intergranular boundaries of the ceramic proper for an increase in apparent relative dielectric constant. The primary ingredients comprise, in relative proportions, 95.18-99.65 wt. % SrTiO.sub.3, 0.33-3.32 wt. % Ta.sub.2 O.sub.5, and 0.02-1.50 wt. % CuO. The secondary ingredients comprise 0.02-0.10 wt. % part SiO.sub.2 and 0.01-0.03 wt. part Al.sub.2 O.sub.3 with respect to 100 wt. parts of the primary ingredients, with the weight ratio of SiO.sub.2 to Al.sub.2 O.sub.3 being from 1.50 to 5.0. The insulating substances comprise 0.03-2.75 wt. % PbO, 0.11-4.22 wt. % Bi.sub.2 O.sub.3, and 0.001-0.18 wt. % B.sub.2 O.sub.3 with respect to the total weight of the primary and the secondary ingredients. In the fabrication of bodies of the ceramic the mixture of the insulating substances is coated or otherwise layered on polycrystalline ceramic bodies prepared from the primary and secondary ingredients. The coated ceramic bodies are then heated to cause diffusion of the insulating substances throughout their intergranular boundaries.
摘要翻译： 由主要和次要成分组成的介电陶瓷材料，其组合形成多晶陶瓷本身，并且绝缘物质在陶瓷本身的整个晶界处扩散，以增加表观相对介电常数。 主要成分以相对比例包含95.18-99.65wt。 ％SrTiO3，0.33-3.32wt。 ％Ta2O5和0.02-1.50wt。 ％CuO。 次要成分包含0.02-0.10wt。 ％部分SiO 2和0.01-0.03重量％ 部分Al2O3相对于100wt。 主要成分的一部分，SiO 2与Al 2 O 3的重量比为1.50〜5.0。 绝缘物质包含0.03-2.75重量％ ％PbO，0.11-4.22wt。 ％Bi 2 O 3和0.001-0.18wt。 ％B2O3相对于初级和次级成分的总重量。 在陶瓷体的制造中，绝缘物质的混合物被涂覆或以其它方式分层在由初级和次级成分制备的多晶陶瓷体上。 然后将涂覆的陶瓷体加热，使绝缘物质扩散到其晶间界面。
-
9.发明授权
公开(公告)号：US4626393A
公开(公告)日：1986-12-02
申请号：US753169
申请日：1985-07-09
CPC分类号： H01G4/2325 , C04B35/4682 , H01G4/1227
摘要： A ceramic composition capable of sintering at a sufficiently low temperature to enable the use of a low cost base metal as the electrode material in the fabrication of capacitors. The major ingredient of the composition is expressed as Ba.sub.k-x-y M.sub.x L.sub.y O.sub.k TiO.sub.2, where M is at least either of mag-nesium and zinc, L is at least either of strontium and calcium, k, x and y are numerals in the ranges of 1.00 to 1.04, 0.002 to 0.049, and 0.001 to 0.048, respectively, and x+y is a value in the range of 0.02 to 0.05. To this major ingredient is added a minor proportion of a mixture of lithium oxide, silicon dioxide, and, possibly, at least one of barium oxide, calcium oxide, and strontium oxide. For the fabrication of coherently bonded bodies of this composition, as for use as the dielectric bodies of capacitors, the moldings of the mixture of the major ingredient and additive in finely divided form are sintered in a reductive or neutral atmosphere and then reheated at a lower temperature in an oxidative atmosphere. The sintering temperature can be so low (typically from 1050.degree. to 1200.degree. C.) that the moldings can be co-sintered with base metal electrodes buried therein without difficulties encountered heretofore.
-
10.发明授权
公开(公告)号：US4610971A
公开(公告)日：1986-09-09
申请号：US676635
申请日：1984-11-30
CPC分类号： H01G4/2325 , C04B35/4682 , H01G4/1227
摘要： A ceramic composition capable of sintering at a sufficiently low temperature to enable the use of a low cost base metal as the electrode material in the fabrication of capacitors. The major ingredient of the composition is expressed as Ba.sub.k-x M.sub.x O.sub.k TiO.sub.2, where M is one or more of magnesium, zinc, strontium, and calcium, and where k, and x are numerals in the ranges of 1.00 to 1.04, and 0.02 to 0.05, respectively. To this major ingredient is added a minor proportion of a mixture of boron oxide, silicon dioxide, and, possibly, at least one of barium oxide, magnesium oxide, zinc oxide, strontium oxide, and calcium oxide. For the fabrication of coherently bonded bodies of this composition, as for use as the dielectric bodies of capacitors, the moldings of the mixture of the major ingredient and additive in finely divided form are sintered in a reductive or neutral atmosphere and then reheated at a lower temperature in an oxidative atmosphere. The sintering temperature can be so low (typically from 1050.degree. to 1200.degree. C.) that the moldings can be co-sintered with base metal electrodes buried therein without difficulties encountered heretofore.
摘要翻译： 能够在足够低的温度下烧结以在电容器制造中能够使用低成本贱金属作为电极材料的陶瓷组合物。 组合物的主要成分表示为Bak-xMxOkTiO 2，其中M是镁，锌，锶和钙中的一种或多种，其中k和x分别为1.00至1.04和0.02至0.05的数字， 分别。 向该主要成分中添加少量的氧化硼，二氧化硅和可能的氧化钡，氧化镁，氧化锌，氧化锶和氧化钙中的至少一种的混合物。 对于该组合物的相干结合体的制造，对于用作电容器的介电体，主要成分和细分散形式的添加剂的混合物的模制品在还原性或中性气氛中烧结，然后在较低的温度下再加热 氧化气氛中的温度。 烧结温度可以如此低（通常为1050℃至1200℃），模制品可以与埋在其中的贱金属电极共烧结而不会遇到困难。
-
-
-
-
-
-
-
-
-
搜索结果
28 条记录 (耗时 0.024 秒)
