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A positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere and preparation method thereof

A technology of thermistor element and positive temperature coefficient, which is applied to resistors, electrical components, and resistor components with positive temperature coefficients, etc. Improve the ability to resist harsh environments, avoid electrical short circuits, and simplify the process steps

Active Publication Date: 2021-11-23
JIANGSU NEW LINZHI ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main reason why the PTC thermal element is easily affected by the harsh environment is that it is a polycrystalline ceramic material. There are not only grain boundaries, but also a large number of micropores. Various bad atmospheres can enter the grain boundaries through these micropores, thereby damaging The macroscopic electrical properties of components, such as the loss of self-temperature control function due to redox

Method used

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  • A positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere and preparation method thereof
  • A positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere and preparation method thereof
  • A positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere and preparation method thereof

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Embodiment 1

[0027] See figure 1 , figure 1 Shown is a positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere, including lead-barium titanate-based and sintered specifications of 24×15×2.4mm (not limited by the exemplified size ) heat-sensitive ceramic tile 1 and metal ohmic electrodes 2 positioned at both sides of the heat-sensitive ceramic tile 1, as the technical points of the technical solution provided by the present invention: it also includes a micropore channel barrier layer 3, in this embodiment , the microporous channel blocking layer 3 is a glass sealing layer, and the glass sealing layer is integrally coated on the outer surface of the aforementioned heat-sensitive ceramic tile 1 with a thickness of 5 μm. The aforementioned metal ohmic electrode 2 is preferably, but not absolutely limited to, aluminum , copper, silver-zinc alloy or base metal as the metal ohmic electrode, and the metal ohmic electrode 2 can be combined with th...

Embodiment 2

[0033] See figure 1 , figure 1 Shown is a positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere, including lead-barium titanate-based and sintered specifications of 24×15×2.4mm (not limited by the exemplified size ) heat-sensitive ceramic tile 1 and metal ohmic electrodes 2 positioned at both sides of the heat-sensitive ceramic tile 1, as the technical points of the technical solution provided by the present invention: it also includes a micropore channel barrier layer 3, in this embodiment , the microporous channel blocking layer 3 is a glass sealing layer, and the glass sealing layer is integrally coated on the outer surface of the aforementioned heat-sensitive ceramic tile 1 with a thickness of 2 μm. The aforementioned metal ohmic electrode 2 is preferably, but not absolutely limited to, aluminum , copper, silver-zinc alloy or base metal as the metal ohmic electrode, and the metal ohmic electrode 2 can be combined with th...

Embodiment 3

[0039] See figure 1 , figure 1 Shown is a positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere, including lead-barium titanate-based and sintered specifications of 24×15×2.4mm (not limited by the exemplified size ) heat-sensitive ceramic tile 1 and metal ohmic electrodes 2 positioned at both sides of the heat-sensitive ceramic tile 1, as the technical points of the technical solution provided by the present invention: it also includes a micropore channel barrier layer 3, in this embodiment , the microporous channel blocking layer 3 is a glass sealing layer, and the glass sealing layer is integrally coated on the outer surface of the aforementioned heat-sensitive ceramic tile 1 with a thickness of 3.5 μm, and the aforementioned metal ohmic electrode 2 is preferably used but not absolutely limited. Aluminum, copper, silver-zinc alloy or base metal are used as the metal ohmic electrode, and the metal ohmic electrode 2 can be c...

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Abstract

A positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere and its preparation method, comprising sintered heat-sensitive ceramic tiles based on lead barium titanate and metal ohms located on both sides of the heat-sensitive ceramic tiles Electrode, features: it also includes a micro-pore channel barrier layer, the micro-pore channel barrier layer includes a glass sealing layer or an organic sealant, when the micro-pore channel barrier layer is a glass sealing layer, the glass sealing layer is integrally covered with heat-sensitive ceramic porcelain The outer surface of the sheet, the metal ohmic electrodes are combined on both sides of the glass sealing layer; when the micropore channel barrier layer is an organic sealant, the organic sealant is filled in the metal ohmic electrodes combined on both sides of the heat-sensitive ceramic tile. In the micropores on the surface and at the same time, the gaps on the surface of the metal ohmic electrode-free area on the peripheral edge of the heat-sensitive ceramic tile are blocked. Improve the ability to resist harsh environments and prolong the service life, improve the reliability and expected service requirements of related heating groups.

Description

technical field [0001] The invention belongs to the technical field of electronic components and their preparation, and in particular relates to a positive temperature coefficient ceramic thermistor element with strong resistance to reducing atmosphere, and also relates to a preparation method thereof. [0002] technical background [0003] The positive temperature coefficient (hereinafter referred to as PTC) ceramic thermal element is generally made of barium titanate-based semiconductor ceramic material. The characteristic of this thermal element is that its resistance value at room temperature will increase sharply by several order of magnitude, which produces the so-called PTC effect. The origin of this PTC effect is caused by the grain boundary barrier. The height of the grain boundary barrier is closely related to the concentration of oxygen atoms adsorbed on the grain boundary. Oxygen loss in the boundary, causing component performance failure or even loss of PTC effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02H01C1/024C04B41/85C04B41/84
CPCH01C7/025H01C1/024C04B41/85C04B41/84C04B41/5022C04B41/009C04B41/4961C04B35/468C04B41/0072C04B41/90C04B41/52C04B2111/00844C03C8/04C03C8/06C03C8/16C03C3/112H01C17/06533H01C17/07C04B35/4684C04B41/51C04B41/5027C04B41/4539C04B41/522C04B37/023C04B37/028C04B2237/10C04B2237/346C04B2237/74H01C1/1406H01C7/021
Inventor 傅邱云何正安周东祥
Owner JIANGSU NEW LINZHI ELECTRONIC TECH CO LTD