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Composition having non-linear current-voltage characteristics

A non-linear current, composition technology, applied in conductive materials dispersed in non-conductive inorganic materials, transportation and packaging, thin material processing, etc., can solve the problem of high electrical stress

Inactive Publication Date: 2013-05-01
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the insulating shield is removed from the cable, the electric field is concentrated at the point of interruption, resulting in higher electrical stress

Method used

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  • Composition having non-linear current-voltage characteristics
  • Composition having non-linear current-voltage characteristics
  • Composition having non-linear current-voltage characteristics

Examples

Experimental program
Comparison scheme
Effect test

example

[0047] The following examples and comparative examples are helpful for the understanding of the present invention, and these examples and comparative examples should not be construed as limiting the scope of the present invention. All parts and percentages are by volume unless otherwise indicated. The following illustrative and comparative examples were evaluated using the test methods and protocols described below:

[0048] material list

[0049]

[0050] testing method

[0051] Test 1: Current-Voltage (I-V) and Conductivity Characteristics .

[0052] The current-voltage (I-V) and conductivity properties of the CCT powder / polymer matrix compositions were determined using a Keithley 619 Programmable Electrometer equipped with a Keithley 247 High Voltage Power Supply Unit. The above measurements are made using the step voltage ramp method, where the current is measured at each voltage step. All measurements were done at room temperature.

[0053] Test 2: Dielect...

example 5

[0080] Example 5 was made according to Preparations 1 and 3.

[0081] Such as Figure 6a and Figure 6b As shown, in the temperature range of about 50°C to about 200°C, the dielectric constant (D k ) and the loss tangent will not differ by more than 15%.

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Abstract

Provided are compositions and materials that have varistor properties and are suitable for use in electrical stress control devices and surge arrestor devices. The compositions and materials include a polymeric material and calcined calcium copper titanate filler material and have a reversible non-linear current-voltage characteristic.

Description

technical field [0001] This invention relates to compositions having non-linear current-voltage characteristics and articles thereof. Background technique [0002] Varistors (ie, piezoresistors) exhibit different impedances depending on the current flowing through the device or the voltage across the device. The properties of varistor materials make them advantageous for use as electrical stress control devices and surge arresters, ie surge protection devices, etc. [0003] For example, electrical stress control devices are used to contain and manage electrical stress when terminating or connecting shielded electrical cables. When the insulating shield is removed from the cable, the electric field is concentrated at the point of the interruption, resulting in high electrical stress. Such applications for terminals or connecting cables require electrical stress control. [0004] Surge protective devices protect against electrical surges generated by electromagnetic effects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/12C08L83/00C08L63/00C08L23/16C08K3/10
CPCH01B1/22Y10T428/12014C08L101/12C08K3/10C08L83/00C08L63/00
Inventor 迪潘克尔·高希肯顿·D·布德纳纳亚克拉·L·D·索马希里蒋鸽布雷德利·L·吉沃特
Owner 3M INNOVATIVE PROPERTIES CO
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