What materials are best for NTC thermistor

NTC thermistor play a crucial role in temperature measurement, control, and compensation due to their characteristic of decreasing resistance with increasing temperature. To manufacture NTC thermistor with excellent performance and high reliability, the selection of materials is of paramount importance. Materials not only determine the basic electrical performance parameters of the components but also directly affect their lifespan, stability, and application range. So, what are the best materials for NTC Thermistor?


 

I. Core Materials of NTC Thermistor

NTC Thermistor are typically made of semiconductor ceramic materials. These ceramic materials are not traditional insulators but rather composite oxides with special electrical conductivity characteristics, which exhibit significant resistance changes at different temperatures. The most common and effective materials include:

1. Manganese Oxide (MnO)
Manganese oxide is one of the most commonly used basic materials for manufacturing NTC Thermistor, featuring a good negative temperature coefficient. It performs stably in the medium and low-temperature range (typically from -40°C to +150°C), with a linear resistance change, making it suitable for most conventional temperature measurement and compensation applications.

2. Nickel Oxide (NiO)
The addition of nickel oxide can effectively enhance the high-temperature performance and stability of NTC Thermistor. When co-sintered with other materials, it can give the resistance element a higher B value (material constant), thereby achieving a more sensitive temperature response. It is often used in fields with extremely high temperature control requirements, such as medical electronics and automotive electronics.

3. Cobalt Oxide (Co₃O₄)
Cobalt oxide is mainly used to improve the stability of NTC Thermistor in high-temperature environments. It can enhance the thermal resistance and reliability of the device, making it suitable for harsh application environments such as electric vehicle battery management systems (BMS). Thermistors containing cobalt are often used in scenarios that require long-term operation in high-temperature environments.

4. Other Auxiliary Materials
To further optimize performance, materials such as copper oxide (CuO) and iron oxide (Fe₂O₃) are often added during the manufacturing process. These materials can adjust the resistance temperature coefficient, improve mechanical strength and anti-aging performance, making the overall performance of NTC Thermistor more outstanding.

 

II. Key Performance Impacted by Material Selection

The choice of different material combinations directly determines the following aspects of NTC Thermistor:

Temperature response curve (B value): Different material combinations can adjust the rate of resistance change within a specific temperature range.

Resistance accuracy and stability: High-purity and optimized raw material ratios can ensure smaller resistance drift and improve reliability during long-term operation.

Environmental resistance: Such as resistance to wet heat aging and mechanical shock, are closely related to the material formula.

Service life: High-quality materials can significantly extend the service life of NTC Thermistor, reducing maintenance and replacement costs.

Therefore, high-quality materials not only enhance performance but are also the core factors determining the application range and reliability of the product.

To obtain NTC Thermistor with excellent performance, it is not only necessary to focus on the materials themselves but also to choose manufacturers with mature processes and strict quality control. For example, Minsing NTC Thermistor select high-purity materials, combine precise material ratios, and employ advanced sintering technology to ensure that the products have: higher temperature sensitivity, better long-term stability, a wider operating temperature range, and excellent environmental adaptability. It is worth noting that all chips are independently developed by the company and support customized production. Whether in industrial control, automotive electronics, home appliances, or the medical and health field, Minsing can provide customers with high-quality and highly reliable NTC thermistor solutions.