公开(公告)号：US4405480A

公开(公告)日：1983-09-20

申请号：US443783

申请日：1982-11-22

申请人： Kiyoshi Murase ,  Nobutatsu Yamaoka ,  Kazuji Onigata

发明人： Kiyoshi Murase ,  Nobutatsu Yamaoka ,  Kazuji Onigata

IPC分类号： H01B3/12 ,  C04B35/47 ,  H01G4/12 ,  C04B35/46

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, 93.18-99.85 wt. % SrTiO.sub.3, 0.13-5.32 wt. % Nb.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 1.5 to 5.0. The insulating substances comprise 0.03-2.75 wt. % PbO, 0.12-4.23 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93.18-99.85wt。 ％SrTiO 3，0.13-5.32wt。 ％Nb2O5和0.02-1.50wt。 ％CuO。 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0.03-2.75重量％ ％PbO，0.12-4.23wt。 ％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。

公开(公告)号：US4405477A

公开(公告)日：1983-09-20

申请号：US443780

申请日：1980-11-22

申请人： Kiyoshi Murase ,  Nobutatsu Yamaoka ,  Kazuji Onigata

发明人： Kiyoshi Murase ,  Nobutatsu Yamaoka ,  Kazuji Onigata

IPC分类号： H01B3/12 ,  C04B35/47 ,  H01G4/12 ,  C04B35/46

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, 91.92-99.62 wt. % SrTiO.sub.3, 0.33-4.08 wt. % Ta.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 0.02-2.83 wt. % PbO, 0.11-4.33 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91.92-99.62wt。 ％SrTiO 3，0.33-4.08wt。 ％Ta2O5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0.02-2.83重量％ ％PbO，0.11-4.33wt。 ％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。