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Positive temperature coefficient thermistor material and thermistor

A technology of positive temperature coefficient and thermistor, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problems of low reliability and achieve the effect of improving reliability rate, increasing absorption force and strong absorption capacity

Inactive Publication Date: 2013-04-03
XIAOGAN HUAGONG GAOLI ELECTRONICS
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing positive temperature coefficient thermistor has low reliability

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  • Positive temperature coefficient thermistor material and thermistor

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0019] The positive temperature coefficient thermistor material of the present invention contains: main components, yttrium-containing compounds, silicon-containing compounds and phosphorus-containing compounds, wherein the main components are barium titanate, strontium titanate, lead titanate and calcium titanate. The molar ratio of the sum of the moles of barium titanate, strontium titanate, lead titanate and calcium titanate to the phosphorus in the phosphorus-containing compound is: 100:0.1~0.5.

[0020] The positive temperature coefficient thermistor material of the present invention may also contain manganese-containing compounds and / or titanium dioxide.

[0021] In preferred embodiment of the present inven...

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Abstract

The invention discloses a low-resistivity positive temperature coefficient thermistor material and a thermistor. The low-resistivity positive temperature coefficient thermistor material comprises principal components, yttrium-containing compound, a silicon-containing compound and a phosphorous compound, wherein the principal components are barium titanate, strontium titanate, lead titanate and calcium titanate; and the molar ratio of the sum of the mole of barium titanate, strontium titanate, lead titanate and calcium titanate to phosphorus in the phosphorous compound is 100: (0.1-0.5). Compared with the tradition that SiO2 is purely adopted as the glass-phase PTC (Positive Temperature Coefficient) ceramic, the sintering temperature is remarkably lowered, the energy consumption is reduced, the glass softening point of P-containing thermosensitive ceramic is lower in the sintering process, and the glass phase has stronger absorbability to harmful impurities such as Fe and the like in the material, so that negative interference of impurity ions to the electrical property of the thermistor is reduced, and accordingly, the reliability of the thermistor is improved.

Description

technical field [0001] The invention relates to a positive temperature coefficient thermistor material and a thermistor, belonging to the field of thermistors. Background technique [0002] The positive temperature coefficient (PTC) thermistor has a low resistance value when the temperature is low, and the resistance rises sharply when the temperature rises to a certain level, sometimes reaching more than 3 to 4 orders of magnitude; therefore, after the PTC is powered on, it passes through itself The rise of heating temperature leads to the increase of resistance, which limits the current in the circuit and has good safety performance. With the development of the national economy, positive temperature coefficient (PTC) thermistor elements are widely used in home appliances, communications, electronic equipment, electrical components, temperature sensing and control, heating and other fields. As frequency conversion air conditioners, low-voltage instruments and communication...

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Application Information

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IPC IPC(8): C04B35/468C04B35/622C04B35/63H01C7/02
Inventor 余勤民邹勇王伟孙雨
Owner XIAOGAN HUAGONG GAOLI ELECTRONICS
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