公开(公告)号：US4254070A

公开(公告)日：1981-03-03

申请号：US089401

申请日：1979-10-30

申请人： Masatada Yodogawa ,  Matsuo Morisawa ,  Takashi Yamamoto ,  Katsunobu Okutani

发明人： Masatada Yodogawa ,  Matsuo Morisawa ,  Takashi Yamamoto ,  Katsunobu Okutani

IPC分类号： H01C7/10 ,  C04B35/453 ,  C04B35/64 ,  H01C7/112 ,  H01C7/02 ,  C04B33/34

CPC分类号： H01C7/112 ,  C04B35/453 ,  C04B35/64 ,  Y10T29/49085

摘要： A sintered body of a ceramic composition for voltage non-linear resistor is produced by sintering an oxide semiconductor composition comprising a main component of zinc oxide and a minor component at 1100.degree. to 1400.degree. C.; then maintaining the sintered body in an inert gas such as N.sub.2, Ar and so on having an oxygen content of 0.1 to 21 vol. % at the temperature lower than the sintering temperature for a specific time; changing the atmosphere into an inert gas having an oxygen content of lower than 0.02 vol. % at 800.degree. to 1200.degree. C.; and cooling it.

摘要翻译： 用于电压非线性电阻器的陶瓷组合物的烧结体通过在1100〜1400℃下烧结含有氧化锌的主要成分和次要成分的氧化物半导体组合物而制造。 然后将烧结体保持在氧含量为0.1〜21体积％的惰性气体例如N 2，Ar等中。 ％的温度低于烧结温度一段特定的时间; 将气氛变成氧含量低于0.02体积％的惰性气体。 ％在800℃〜1200℃。 并冷却。

公开(公告)号：US5698145A

公开(公告)日：1997-12-16

申请号：US230878

申请日：1994-04-20

申请人： Tetsu Narutani ,  Masakatsu Yamazaki ,  Keizou Okuno ,  Katsunobu Okutani ,  Kouzou Fujiwara

发明人： Tetsu Narutani ,  Masakatsu Yamazaki ,  Keizou Okuno ,  Katsunobu Okutani ,  Kouzou Fujiwara

IPC分类号： C04B35/26 ,  C04B35/38 ,  C04B35/64 ,  H01F1/34

CPC分类号： C04B35/2658 ,  C04B35/64

摘要： A method for sintering Mn--Zn ferrite green compacts is provided which includes a first heating step of raising the temperature from room temperature to 600.degree. C. within a period from 30 minutes to 5 hours, a second heating step of raising the temperature from 600.degree. C. to the sintering temperature and holding the sintering temperature until the start of cooling within a period shorter than 10 hours, and a cooling step of lowering the temperature to 150.degree. C. within a period longer than 3 hours, with the total period of the three steps being shorter than 20 hours. This method permits the efficient production in a short time of Mn--Zn ferrites having good magnetic properties.

摘要翻译： 提供一种用于烧结Mn-Zn铁氧体生坯的方法，其包括在30分钟至5小时内将温度从室温升至600℃的第一加热步骤，将温度从600℃升高的第二加热步骤 ℃至烧结温度，并保持烧结温度直到在短于10小时的时间内开始冷却，以及在超过3小时内将温度降至150℃的冷却步骤，总周期 这三个步骤短于20小时。 该方法允许在短时间内有效地生产具有良好磁性能的Mn-Zn铁氧体。

公开(公告)号：US5476605A

公开(公告)日：1995-12-19

申请号：US229121

申请日：1994-04-18

申请人： Naoe Hirai ,  Tohoru Murase ,  Katsunobu Okutani ,  Teruo Mori

发明人： Naoe Hirai ,  Tohoru Murase ,  Katsunobu Okutani ,  Teruo Mori

IPC分类号： C01G49/00 ,  C01G49/06 ,  C04B35/26 ,  H01F1/34

CPC分类号： C04B35/2658 ,  C01G49/06 ,  C01P2006/42 ,  C01P2006/80

摘要： A Mn-Zn ferrite containing a maximum of 0.005 wt. % P.

摘要翻译： 含有最多0.005重量％的Mn-Zn铁氧体 ％P.

公开(公告)号：US5200159A

公开(公告)日：1993-04-06

申请号：US422798

申请日：1989-10-17

申请人： Naoe Hirai ,  Tohoru Murase ,  Teruo Mori ,  Katsunobu Okutani

发明人： Naoe Hirai ,  Tohoru Murase ,  Teruo Mori ,  Katsunobu Okutani

IPC分类号： C01G49/10 ,  C01G49/00 ,  C01G49/06 ,  C04B35/26 ,  C22B3/10 ,  C22B3/44 ,  C22B47/00

CPC分类号： C22B3/10 ,  C01G49/0072 ,  C01G49/06 ,  C04B35/26 ,  C22B3/44 ,  C22B47/00 ,  C01P2006/42 ,  C01P2006/80 ,  Y02P10/234 ,  Y10S423/01

摘要： A purified solution containing iron chloride and manganese chloride, having a phosphorus content not higher than about 0.007 wt. % with respect to the total content of iron and manganese. The method for producing the purified solution comprises the steps of dissolving manganese containing raw material in hydrochloric solution; oxidizing the solution; adjusting the pH of the solution to 2.5.about.4.5 to form insolubles; and separating the insolubles from the solution. This solution can be utilized to produce a mixed powder of an iron oxide and a manganese oxide. The mixed powder is useful for producing a high-quality soft ferrite.

公开(公告)号：US5032367A

公开(公告)日：1991-07-16

申请号：US285451

申请日：1988-12-16

申请人： Naoe Hirai ,  Tohoru Murase ,  Katsunobu Okutani ,  Teruo Mori

发明人： Naoe Hirai ,  Tohoru Murase ,  Katsunobu Okutani ,  Teruo Mori

IPC分类号： C01G49/10 ,  C01G49/00 ,  C01G49/06 ,  C04B35/26 ,  C22B3/10 ,  C22B3/44 ,  C22B47/00

CPC分类号： C22B3/10 ,  C01G49/0072 ,  C01G49/06 ,  C04B35/26 ,  C22B3/44 ,  C22B47/00 ,  C01P2006/42 ,  C01P2006/80 ,  Y02P10/234 ,  Y10S423/01

摘要： A method for producing a powdered iron oxide comprises the steps of adjusting the pH of a crude iron chloride solution to 2.5-4.5; reducing the P content of the solution by mechanical stirring or air bubbling and filtering; and oxidizing the solution into a powdered iron oxide having a maximum P content of 0.005 wt. %. The P content of the solution may also be reduced by ultrafilter treatment. The soft ferrite made by using the powdered iron oxide by this process shows excellent magnetic properties.