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公开(公告)号：US5288444A
公开(公告)日：1994-02-22
申请号：US39256
申请日：1987-04-17
IPC分类号： C04B35/622 , F27D1/00 , F27B9/04
CPC分类号： F27D1/0009 , C04B35/62272
摘要： Ceramic fibers formed by the pyrolysis of organosilicon preceramic polymers are provided with increased resistivity by treating the fibers in air at temperatures of less than 1,000.degree. C. to oxidize the free carbon content of the fibers.
摘要翻译： 通过有机硅预陶瓷聚合物的热解形成的陶瓷纤维通过在小于1000摄氏度的温度下处理空气中的纤维而提高了电阻率，以氧化纤维的游离碳含量。
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公开(公告)号：US4873604A
公开(公告)日：1989-10-10
申请号：US750216
申请日：1985-07-01
CPC分类号： G01K7/22 , H01H85/0241 , H01H85/38 , H02H3/06 , H01H2085/385 , H02H9/02
摘要： A shunt device and a method are described for protecting electrical equipment when a fuse blows. The shunt device establishes a by-pass across the fuse for permitting a limited amount of current to begin to flow at a lower voltage than the fuse blowing voltage and before the fuse blows, thereby serving as a transitory relief valve for a portion of the current while minimizing or even substantially eliminating the inductive spike when the fuse blows. The shunt device is made of at least one pyrolyzed polyacrylonitrile (PPP) fiber having a selected switching voltage so that the PPP fiber switches to a low resistance state while the fuse is blowing. When the fuse and PPP characteristics are properly matched, the rate of change of the current with time is lowered, thus selectively decreasing the size of the voltage transients which occur after the fuse blows.
摘要翻译： 描述了分流装置和方法，用于在保险丝熔断时保护电气设备。 分流装置在保险丝上建立旁路，以允许有限量的电流以比熔丝熔断电压低的电压开始流动，并且在保险丝熔断之前，从而用作电流的一部分的临时溢流阀 同时在保险丝熔断时最小化甚至基本消除电感尖峰。 分流装置由至少一种具有所选择的开关电压的热解的聚丙烯腈（PPP）纤维制成，使得在保险丝熔断时，PPP光纤切换到低电阻状态。 当保险丝和PPP特性正确匹配时，电流随时间的变化率降低，从而选择性地减小保险丝熔断后发生的电压瞬变的大小。
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3.发明授权
公开(公告)号：US4856179A
公开(公告)日：1989-08-15
申请号：US141077
申请日：1988-01-05
IPC分类号： H01L45/00
CPC分类号： H01L45/00 , Y10T29/49002 , Y10T29/49105
摘要： An electrical device is made by partially pyrolyzing polymer material by heating the material to between 500.degree. C. and 800.degree. C. Electrodes are applied to the material at two different locations to define an electrically active element therebetween. The device exhibits negative resistance in a portion of its voltage current domain and function as bi-directional electrical switches.This application is a continuation of application Ser. No. 859,709, filed May 5, 1986, now abandoned, which is a divisional application of application ser. No. 487,401, filed Apr. 21, 1983, now U.S. Pat. No. 4,642,644.
摘要翻译： 通过将材料加热至500℃至800℃，通过部分热解聚合物材料制成电子器件。电极在两个不同位置施加到材料上以在其间限定电活性元件。 该器件在其电压电流域的一部分中呈现负电阻并且用作双向电开关。 这个应用程序是应用程序的延续。 1986年5月5日提交的第859,709号现在已经放弃，这是一个应用程序的分案申请。 1983年4月21日提交的美国专利第487,401号。 第4,642,644号。
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公开(公告)号：US4642664A
公开(公告)日：1987-02-10
申请号：US487401
申请日：1983-04-21
IPC分类号： H01L45/00
CPC分类号： H01L45/00
摘要： An electrical device is made by partially pyrolyzing polymer material by heating the material to between 500.degree. C. and 800.degree. C. Electrodes are applied to the material at two different locations to define an electrically active element therebetween. Devices made according to the teachings of the disclosure exhibit negative resistance in a portion of their voltage current domain and function as bi-directional electrical switches.
摘要翻译： 通过将材料加热至500℃至800℃，通过部分热解聚合物材料制成电子器件。电极在两个不同位置施加到材料上以在其间限定电活性元件。 根据本公开的教导制造的器件在其电压电流域的一部分中呈现负电阻并且用作双向电开关。
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5.发明授权Electrical temperature pyrolyzed polymer material detector and associated circuitry 失效电温热解聚合物材料检测器及相关电路
公开(公告)号：US4577979A
公开(公告)日：1986-03-25
申请号：US487378
申请日：1983-04-21
CPC分类号： G01K7/22
摘要： Temperature detectors are disclosed which employ, as their active elements, pieces of partially pyrolyzed polymer material which switch to a more highly conductive state under appropriate imposed electrical bias conditions when the ambient temperature increases above the switching temperature of the detector.
摘要翻译： 公开了温度检测器，其使用部分热解聚合物材料作为其有源元件，当环境温度升高到高于检测器的开关温度时，在适当的施加的电偏压条件下切换到更高导电状态。
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