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Method for manufacturing zero-power ceramic chip of PTC (Positive Temperature Coefficient) heater

A production method and zero-power technology, applied in the direction of resistors, resistance manufacturing, non-adjustable metal resistors, etc., can solve the problems of high processing costs, and achieve the effects of low cost, easy control, and guaranteed safety and reliability

Pending Publication Date: 2022-03-04
江苏钧瓷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the waste contains lead, it must be recycled and processed by a professional and qualified department, and the processing cost is relatively high, which is not a small expense for PTC ceramic manufacturers.

Method used

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  • Method for manufacturing zero-power ceramic chip of PTC (Positive Temperature Coefficient) heater
  • Method for manufacturing zero-power ceramic chip of PTC (Positive Temperature Coefficient) heater
  • Method for manufacturing zero-power ceramic chip of PTC (Positive Temperature Coefficient) heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composition of the ceramic material of embodiment 1 is as follows table 1:

[0033] Table 1 Embodiment 1 raw material batching list (unit: Kg)

[0034]

[0035]

[0036] Reclaim waste material and sludge with the formula in the table, take agate ball and water as medium, mixed ball mill 22 hours, then add the polyvinyl alcohol (PVA) that the concentration of powder gross weight 8.0wt% is 10wt% (PVA), continue ball mill 2 hour, and then carry out spray granulation, and press the obtained powder with a pressure of 10MPa to make a square green body with a size of 28×17.3×2.9mm;

[0037] In the air atmosphere, sinter the pressed green body at 1210°C, heat-preserve and sinter for 20-120 min, so that the square green body is fully sintered and solid-state reaction is realized, and a dense ceramic sheet is obtained.

[0038] Grind the upper and lower surfaces of the above-mentioned ceramic sheet to a thickness of 2.34-2.37mm, and then go through the process of spray...

Embodiment 2

[0042] The composition of the ceramic material of embodiment 2 is as follows table 1:

[0043] Table 2 Embodiment 2 raw material batching list (unit: Kg)

[0044]

[0045]

[0046] Reclaim waste material and sludge with the formula in the table, take agate ball and water as medium, mixed ball mill 22 hours, then add the polyvinyl alcohol (PVA) that the concentration of powder material gross weight 7.0wt% is 10wt% (PVA), continue ball mill 2 hour, and then carry out spray granulation, and press the obtained powder with a pressure of 10MPa to make a square green body with a size of 28×17.3×2.9mm;

[0047] In the air atmosphere, sinter the pressed green body at 1180° C., heat-preserve and sinter for 20-120 minutes, so that the square green body is fully sintered and solid-state reaction is realized, and a dense ceramic sheet is obtained.

[0048] Grind the upper and lower surfaces of the above-mentioned ceramic sheet to a thickness of 2.34-2.37mm, and then go through the p...

Embodiment 3

[0052] The composition of the ceramic material of embodiment 3 is as follows table 1:

[0053] Table 1 Embodiment 3 raw material batching list (unit: Kg)

[0054]

[0055]

[0056] Reclaim waste material and sludge with the formula in the table, take agate ball and water as medium, mixed ball mill 22 hours, then add the polyvinyl alcohol (PVA) that the concentration of powder material gross weight 7.0wt% is 10wt% (PVA), continue ball mill 2 hour, and then carry out spray granulation, and press the obtained powder with a pressure of 10MPa to make a square green body with a size of 28×17.3×2.9mm;

[0057] In the air atmosphere, sinter the pressed green body at 1150° C., hold the heat and sinter for 20-120 minutes, so that the square green body is fully sintered and solid-state reaction is realized, and a dense ceramic sheet is obtained.

[0058] Grind the upper and lower surfaces of the above-mentioned ceramic sheet to a thickness of 2.34-2.37mm, and then go through the pro...

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Abstract

The invention discloses a method for manufacturing a zero-power ceramic chip of a PTC (Positive Temperature Coefficient) heater, which comprises the following steps of: grinding all components in the material of the zero-power ceramic chip of the PTC heater into powder through a ball mill, mixing to form mixed powder, and adding water as a medium; adding PVA particles or a PVA solvent as a binder, carrying out ball milling on the mixed powder, water and the binder for a preset time at the same time, and then carrying out granulation to obtain mixed powdery particles; the mixed powdery particles are pressed into a biscuit with a preset size, and the biscuit is placed in an air atmosphere with a preset temperature to be fully sintered into the compact ceramic. The zero-power ceramic chip of the PTC heater is made of waste recycled materials or sludge of PTC production enterprises. The waste treatment cost can be reduced, and the method is simple to operate, easy to control, low in cost and very suitable for industrial implementation.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a method for manufacturing a zero-power ceramic sheet of a PTC heater, which is applied in the technical field of electronic materials. Background technique [0002] The PTC heater is a function of constant temperature heating using PTC thermistor ceramics. The PTC ceramic sheet is combined with a radiator. After power-on, the heat is dissipated by strong wind or liquid to achieve the heating effect. PTC heaters have been widely used in air conditioners, new energy vehicle thermal management systems, etc., with a wide range of applications and a huge market. Since the heating power of the PTC is related to the size of the heater, the size of the heater is determined by the application. Therefore, under normal circumstances, the sum of the PTC ceramics used is shorter than the total length of the heater. In order to ensure unnecessary inter-electrode discharg...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622H01C7/02H01C17/00
CPCC04B35/4684C04B35/62204H01C7/025H01C17/00C04B2235/3234C04B2235/3296C04B2235/3215C04B2235/3454C04B2235/3826C04B2235/3217C04B2235/3418C04B2235/3267
Inventor 朱兴文张楠贾小晶
Owner 江苏钧瓷科技有限公司
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