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Slow change type refractory ceramics heating material with positive temperature coefficient

A positive temperature coefficient, high temperature ceramic technology, used in electrical components, printed circuit manufacturing, printed circuits, etc., can solve the problem of lead pollution of PTC ceramic sheets, and achieve the effects of low cost, high far-infrared emissivity, and fast response time

Inactive Publication Date: 2006-09-06
白铁城
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned PTC ceramic sheet has lead pollution, and its composition is mixed with lead, which has been banned from being used in the electronics industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] See Table 1 and Table 2, implement the fifth example of the functional phase and the fourth example of the grain boundary phase according to functional phase: grain boundary phase = 60%: 40%.

[0023] Total weight (g)

[0024] Total weight (g)

[0025] A total of 60 grams of the functional phase was mixed with 40 grams of the grain boundary phase. After grinding, granulation, molding and sintering at a temperature of 1200°C-1350°C, a ceramic material with certain electrical properties is formed. Coat silver paste on both ends of the material, and then burn at 800°C to form a heating material with electric heating function.

Embodiment 2

[0027] See Table 1 and Table 2, implement the fifth example of functional phase and the first example of grain boundary phase according to functional phase: grain boundary phase = 50%: 50%.

[0028] Total weight (g)

[0029] Total weight (g)

[0030] A total of 50 grams of the functional phase was mixed with 50 grams of the grain boundary phase. After grinding, granulation, molding and sintering at a temperature of 1280°C-1350°C, a ceramic material with certain electrical properties is formed. Coat silver paste on both ends of the material, and then burn at 800°C to form a heating material with electric heating function.

Embodiment 3

[0032] See Table 1 and Table 2, implement the 4th example of functional phase and the 1st example of grain boundary phase by functional phase: grain boundary phase=70%:30% and functional phase:grain boundary phase=40%:60%.

[0033] functional phase

[0034] Total weight (g)

[0035] Total weight (g)

[0036] A total of 70 grams and 40 grams of the functional phase were mixed with 30 grams and 60 grams of the grain boundary phase, respectively. After grinding, granulation, molding and sintering at a temperature of 1200°C-1350°C, a ceramic material with certain electrical properties is formed. Coat silver paste on both ends of the material, and then burn at 800°C to form a heating material with electric heating function.

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PUM

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Abstract

The present invention relates to a The present invention relates to a gradual change type positive temperature coefficient high temperature ceramics heating material. It contains proportionally mixing function phase and grain boundary phase, through milling, pelleting, moulding, and sintering, weight ratio of said function phase and grain boundary phase being 70-40 : 30-60 per cent, function phase including simple substance element, said simple substance element being one kind or variety of germanium, silicon, silicon, and carbon. Function phase can be added with resistor property modifier, which is one kind of variety of yttria, lanthanum oxide, ceria, copper oxide, and antimony oxide, resistivity property modifier content being 0-5 per cent according to weight according to weight ratio. Said invention has advantages of 1, less resistivity, 2, having gradual change type positive temperature coefficient, high heating temperature, and fine high temperature stability high temperature stability, 3, fast response time, 4, raw material unable to generate contamination to environment, 5, simple technology, low cost, and high reliability.

Description

technical field [0001] The invention relates to the technical field of electronic materials and electric heating, in particular to a slow-varying positive temperature coefficient high-temperature ceramic heating material. Background technique [0002] Electronic materials and technologies in the prior art have been widely used. These electronic materials are mainly used as conductors and resistance and capacitance elements for information processing and also have electric heating functions. Electric heating technology has a long history. For a long time, the heating elements used in household appliances, industry, agriculture, medicine, scientific research and other fields are mostly resistance wires or electric heating tubes assembled with resistance wires. Traditional resistance wires have low heating efficiency and short life. Disadvantages such as working at low voltage (such as 12V). The heating elements developed in the 1980s to replace electric heating tubes include ...

Claims

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Application Information

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IPC IPC(8): H05K3/14C04B35/00
Inventor 白铁城王培英
Owner 白铁城
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