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1. 发明授权

US5980785A Metal-containing compositions and uses thereof, including preparation of resistor and thermistor elements 失效
标题翻译：含金属的组合物及其用途，包括制备电阻和热敏电阻元件
公开(公告)号：US5980785A
公开(公告)日：1999-11-09
申请号：US942368
申请日：1997-10-02
申请人： Xiaomei Xi , Sam Fu , Goran Matijavesic , Lutz Brandt , Catharine Gallagher , Pradeep Gandhi
发明人： Xiaomei Xi , Sam Fu , Goran Matijavesic , Lutz Brandt , Catharine Gallagher , Pradeep Gandhi
IPC分类号： C08K3/00 , H01B1/02 , H01B1/00 , C08J3/00 , C08K3/08
CPC分类号： C08K3/0008
摘要： In accordance with the present invention, there are provided novel metal-containing compositions useful for the preparation of electrical resistance devices (e.g., resistors and thermistor elements). Compositions according to the invention comprise at least one low melting point metal material, and optionally a higher melting point metal material, with the further presence of a binder system also being optional. Compositions according to the invention exhibit a wide range of resistivity and a wide range of values for temperature coefficient of resistance (TCR). Compositions with low values for TCR are useful for resistor applications while compositions with large values for TCR are useful for thermistor applications. Resistor or thermistor elements can be produced by applying compositions according to the invention onto suitable substrates and subsequently alloying (i.e., curing and/or sintering) the compositions. During curing/sintering, the metal or metal alloy powders undergo transient liquid phase sintering to form a continuous metallurgical network. The electrical conduction of the resulting resistor and/or thermistor elements is achieved as a result of the continuous metallurgical network. Resistance and values for TCR of resistors and/or thermistors prepared employing compositions according to the invention are dependent on the intermetallic compounds formed as a result of the alloying/sintering process. Resistors and thermistor elements formed employing compositions according to the invention are stable up to approximately 250.degree. C. and can be used in the temperature range of about -50.degree. C. up to about 200.degree. C. These metal-containing compositions are compatible with polymer, metal and other types of substrates, are highly reliable as compared to existing technology.
摘要翻译：根据本发明，提供了用于制备电阻装置（例如电阻器和热敏电阻元件）的新颖的含金属组合物。根据本发明的组合物包含至少一种低熔点金属材料和任选的较高熔点的金属材料，另外还存在粘合剂体系也是可选的。根据本发明的组合物表现出宽范围的电阻率和宽的温度范围的温度系数值（TCR）。具有低TCR值的组合对于电阻器应用是有用的，而具有大的TCR值的组合物可用于热敏电阻应用。电阻或热敏电阻元件可以通过将根据本发明的组合物施加到合适的基底上并随后将组合物合金化（即固化和/或烧结）来制备。在固化/烧结期间，金属或金属合金粉末进行瞬态液相烧结，形成连续的冶金网络。所得到的电阻和/或热敏电阻元件的导电是由于连续的冶金网络而实现的。使用根据本发明的组合物制备的电阻器和/或热敏电阻的TCR的电阻和值取决于由于合金/烧结工艺而形成的金属间化合物。使用根据本发明的组合物形成的电阻器和热敏电阻元件在高达约250℃下是稳定的，并且可以在约-50℃至约200℃的温度范围内使用。这些含金属组合物与聚合物，金属和其他类型的基材，与现有技术相比是高度可靠的。

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