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Waste recycling method of positive temperature coefficient thermistor
The invention discloses a waste recycling method of a positive temperature coefficient thermistor, which comprises the following steps: mixing waste, carbon black and Y2O3 according to the weight ratio of 100: (0.5-1.5): (0.0005-0.0007), putting into a ball mill, and carrying out ball milling for 12-14 hours to obtain mixed powder; drying the mixed powder, and performing closed reduction for 2-3 hours in a reducing gas atmosphere; carrying out secondary ball milling on the mixed powder, and then adding a polyvinyl alcohol solution for granulation; pressing the granulation powder into a green body by using a dry pressing mold, and then carrying out high-temperature sintering to form ceramic; and spraying an electrode on the surface of the obtained ceramic, sintering at low temperature, and curing to obtain a finished product of the PTC thermistor ceramic material. The defects in the prior art are overcome, the problem of large resistance caused by secondary sintering of the ceramic waste is effectively solved, and the secondary sintering resistance can be recovered to the level of primary sintering.
本发明公开了一种正温度系数热敏电阻的废料再利用方法，包括以下步骤：将废料、碳黑和Y2O3按照100:(0.5‑1.5):(0.0005‑0.0007)的重量比进行混合，并装入球磨机后球磨12～14小时,得到混合粉体；再将混合粉体烘干后，还原气体氛围下，密闭还原2～3小时；再对混合粉体进行二次球磨，然后加入聚乙烯醇溶液进行造粒；用干压模具对造粒粉压成生坯，再进行高温烧结，以形成陶瓷；在得到的陶瓷表面喷涂电极，再低温烧结，固化，获得PTC热敏电阻陶瓷材料成品。本发明克服了现有技术的不足，有效解决了陶瓷废料二次烧结，带来的大电阻问题，使得二次烧电阻能够恢复到一次烧结的水准。
Waste recycling method of positive temperature coefficient thermistor
The invention discloses a waste recycling method of a positive temperature coefficient thermistor, which comprises the following steps: mixing waste, carbon black and Y2O3 according to the weight ratio of 100: (0.5-1.5): (0.0005-0.0007), putting into a ball mill, and carrying out ball milling for 12-14 hours to obtain mixed powder; drying the mixed powder, and performing closed reduction for 2-3 hours in a reducing gas atmosphere; carrying out secondary ball milling on the mixed powder, and then adding a polyvinyl alcohol solution for granulation; pressing the granulation powder into a green body by using a dry pressing mold, and then carrying out high-temperature sintering to form ceramic; and spraying an electrode on the surface of the obtained ceramic, sintering at low temperature, and curing to obtain a finished product of the PTC thermistor ceramic material. The defects in the prior art are overcome, the problem of large resistance caused by secondary sintering of the ceramic waste is effectively solved, and the secondary sintering resistance can be recovered to the level of primary sintering.
本发明公开了一种正温度系数热敏电阻的废料再利用方法，包括以下步骤：将废料、碳黑和Y2O3按照100:(0.5‑1.5):(0.0005‑0.0007)的重量比进行混合，并装入球磨机后球磨12～14小时,得到混合粉体；再将混合粉体烘干后，还原气体氛围下，密闭还原2～3小时；再对混合粉体进行二次球磨，然后加入聚乙烯醇溶液进行造粒；用干压模具对造粒粉压成生坯，再进行高温烧结，以形成陶瓷；在得到的陶瓷表面喷涂电极，再低温烧结，固化，获得PTC热敏电阻陶瓷材料成品。本发明克服了现有技术的不足，有效解决了陶瓷废料二次烧结，带来的大电阻问题，使得二次烧电阻能够恢复到一次烧结的水准。
Waste recycling method of positive temperature coefficient thermistor
一种正温度系数热敏电阻的废料再利用方法
LI XINGYUN (author)
2024-02-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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