A kind of NTC thermistor chip and preparation method thereof

A thermistor chip and wafer technology, applied in the direction of resistors, resistor components, non-adjustable metal resistors, etc., can solve problems affecting service life and stability, R value and B value drift, etc., to achieve good resistance High temperature oxidation, high B value, uniform particle size distribution effect

Active Publication Date: 2022-01-25
青岛三元传感技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the related technologies mentioned above, the inventor believes that when the NTC thermistor is in use, it is prone to drift in R value and B value after long-term high-temperature aging, which affects its service life and stability

Method used

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  • A kind of NTC thermistor chip and preparation method thereof
  • A kind of NTC thermistor chip and preparation method thereof
  • A kind of NTC thermistor chip and preparation method thereof

Examples

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preparation example 1

[0053] Preparation Example 1: Put cobalt oxalate in a zirconia sagger, place the zirconia sagger in a muffle furnace, heat from room temperature to 800°C for 9 hours, then raise the temperature to 850°C for 40 minutes, Insulate at 850°C for 40min and cool to below 75°C to prepare Co 3 o 4 .

preparation example 2

[0054] Preparation Example 2: Put cobalt oxalate in a zirconia sagger, put the zirconia sagger in a muffle furnace, heat from room temperature to 800°C for 8.5 hours, then raise the temperature to 850°C for 35 minutes , kept at 850°C for 35min, and cooled to below 75°C to obtain Co 3 o 4 .

preparation example 3

[0055] Preparation Example 3: Put cobalt oxalate in a zirconia sagger, put the zirconia sagger in a muffle furnace, heat from room temperature to 800°C for 8 hours, then raise the temperature to 850°C for 30 minutes, Insulate at 850°C for 30min, cool to below 75°C to prepare Co 3 o 4 .

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Abstract

The application relates to the technical field of thermistors, and specifically discloses an NTC thermistor chip and a preparation method thereof. The NTC thermistor chip is made of raw materials containing the following parts by weight: 538.28‑538.38 parts of Mn 3 o 4 , 24.88‑24.98 NiO, 436.69‑436.79 Co 3 o 4 The preparation method is as follows: S1. Weighing; S2. Mixing; S3. Grinding and calcining after drying; S4. Micro-grinding; S5. Spray granulation; . Polishing and cleaning; S10. Silver brushing and cutting. The NTC thermistor chip of the present application has the advantages of good resistance value and B value consistency, after long-term use in a high temperature environment, the resistance value drift rate is less than 1%, the service life is long, and the advantages of high stability; in addition, the preparation of the present application The method has the advantages of high degree of particle dispersion, not easy to agglomerate, and high flexural strength of the chip.

Description

technical field [0001] The present application relates to the technical field of thermistors, more specifically, it relates to an NTC thermistor chip and a preparation method thereof. Background technique [0002] The thermistor is a sensitive element, which is divided into PTC (positive temperature coefficient thermistor) and NTC (negative temperature coefficient thermistor) according to the temperature coefficient. The typical feature of thermistor is that it is sensitive to different temperature , Different resistance values ​​are exhibited at different temperatures. The higher the temperature of the PTC thermistor, the greater the resistance value. The higher the temperature of the NTC thermistor, the lower the resistance value. They both belong to semiconductor devices. [0003] NTC thermistor is a semiconductor ceramic made of two or more metal oxides such as manganese, cobalt, nickel, copper, silicon, zinc, etc., which are fully mixed, formed, and sintered. With many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/04H01C1/034
CPCH01C7/043H01C1/034
Inventor 鱼灌金成慧赵振波张向营
Owner 青岛三元传感技术有限公司
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