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Product Description
Product Introduction
Barium Titanate (BaTiO₃) is the core ceramic material used in the production of Positive Temperature Coefficient (PTC) thermistors. These thermistors exhibit a sharp and repeatable increase in resistance at a specific temperature, known as the Curie temperature, making them ideal for overcurrent protection, self-regulating heaters, and temperature sensors.
BaTiO₃’s unique ferroelectric and semiconducting properties are critical for the performance of PTC thermistors. Through precise doping and formulation control, BaTiO₃-based ceramics can be engineered to exhibit a strong PTC effect, offering a rapid and stable resistance rise once a threshold temperature is reached. This self-regulating behavior allows PTC thermistors to protect circuits without the need for fuses or external control mechanisms.
Our Barium Titanate is engineered for high purity, consistent particle size, and stable performance, ensuring reliable and reproducible electrical characteristics in thermistor manufacturing. It supports a wide range of applications including power supply protection, motor starting, heating elements, and battery management systems.
Physical Properties
| Item | Spec | Remark |
| Particle Size Distribution (D50) |
0.2 ~ 30 μm |
Laser Particle Size Analizer |
| Water Content (wt%) |
0.2 ~ 30μm ： < 0.5 |
105℃ × 1Hr |
| Ignition Loss (wt%) |
0.2 ~ 30μm ： < 1.0 |
800℃ × 1Hr |
Chemical Composition (BaTiO3)
| Product No. | BT-1 Series | BT-2 Series | BT-3 Series |
| BaO/TiO2 ( Mole Ratio) | 1.000±0.01 | 1.000±0.02 | 1.000±0.03 |
| SrO(wt%) | <0.05 | <0.1 | <0.3 |
| Fe2O3 (wt%) | <0.01 | <0.03 | <0.1 |
| K2O+Na2O(wt%) | <0.01 | <0.03 | <0.1 |
| Al2O3 (wt%) | <0.1 | <0.2 | <0.3 |
| SiO2(wt%) | <0.1 | <0.2 | <0.3 |
Chemical Composition(BaTi4O9)
| Item | BaTi4O9 |
| BaO/TiO2(Mole ratio) | 0.25±0.01 |
| SrO(wt%) | <0.05 |
| Fe2O3 (wt%) | <0.01 |
| Na2O+K2O(wt%) | <0.01 |
| Al2O3 (wt%) | <0.1 |
| SiO2 (wt%) | <0.1 |
Product Details
Barium titanate (BaTiO₃) is a high-performance functional material with high dielectric constant, good conductivity control ability and stable thermal performance in the field of carbon powder application. It is widely used in electronic materials, capacitors, sensors, conductive coatings, and CCL. The main features include:
1. High dielectric constant
BaTiO₃ has an extremely high dielectric constant and can be used to improve the capacitance performance of carbon powder in electronic devices.
Suitable for high-performance capacitors, energy storage components and power electronic equipment.
2. Conductive performance regulation
Through doping modification, BaTiO₃ can adjust the conductivity of carbon powder, making it have good electrical adaptability in different applications.
Suitable for conductive inks, antistatic coatings and electronic electrode materials.
3. High thermal stability
BaTiO₃ has excellent thermal stability and can still maintain its dielectric properties and structural integrity in high temperature environments.
Suitable for high-temperature electronic components, thermosensitive materials and heat-resistant coatings.
4. Good dispersibility
After surface modification, BaTiO₃ can be evenly dispersed in the carbon powder matrix to improve the uniformity and consistency of the material.
Suitable for high-precision electronic components and advanced functional materials.
5. Compatible with a variety of carbon-based materials
Can be compounded with carbon-based materials such as graphite, carbon nanotubes (CNT), graphene, etc. to enhance the overall electrical and mechanical properties.
Suitable for supercapacitors, functional composite materials and electronic inks.
FAQ
1: What is the role of Barium Titanate in PTC thermistors?
BaTiO₃ is the base ceramic material that provides the PTC effect. When doped and sintered correctly, it shows a sharp increase in resistance at its Curie temperature, enabling automatic temperature or current regulation.
2: Can the Curie temperature be adjusted?
Yes, by modifying the doping elements and processing conditions, the Curie temperature of BaTiO₃-based PTC ceramics can be tailored to meet specific application needs.
3: What particle size is recommended for thermistor production?
Submicron to fine micron-sized powders are typically preferred to ensure uniform sintering and reliable electrical performance.
4: Is your BaTiO₃ material RoHS compliant?
Yes, our Barium Titanate is RoHS-compliant and free from hazardous substances, making it suitable for use in environmentally regulated applications.
5: Is BaTiO₃ suitable for multilayer PTC thermistors?
Yes, our finely processed BaTiO₃ is ideal for both multilayer and disc-type PTC thermistor designs.
