Introduction to Wollastonite in Brake Shoes Formulas
Wollastonite, a naturally occurring calcium inosilicate mineral, has emerged as a crucial ingredient in brake shoes formulas. It is incorporated into the Brake Shoes Mixture, which forms the basis of Brake Shoes Friction Materials. In this article, we will delve into its technical parameters, advantages, and proper storage and packaging methods.
Technical Parameters
| Parameter | Value |
|---|---|
| Chemical Formula | CaSiO₃ |
| Density | Approximately 2.8 – 3.0 g/cm³ |
| Mohs Hardness | 4.5 – 5.0 |
| Melting Point | Around 1540 °C |
| Particle Size Range | Varies, typically from a few micrometers to tens of micrometers |
| Aspect Ratio | Can be relatively high, often in the range of 5:1 to 20:1 |
Advantages of Wollastonite in Brake Shoes
1. Friction Performance
- Wollastonite helps to maintain a stable coefficient of friction in Brake Shoes Mixes. This consistency is essential for reliable braking performance under different operating conditions, such as varying speeds, loads, and temperatures.
- It contributes to the formation of a smooth and even friction surface, reducing the likelihood of sudden changes in braking force that could lead to jerky stops.
2. Wear Resistance
- The acicular (needle – like) structure of wollastonite provides reinforcement to the brake shoes matrix. This reinforcement increases the material’s resistance to wear, extending the service life of the brake shoes.
- By reducing wear, it also helps to maintain the integrity of the brake shoes over time, ensuring consistent braking performance throughout their lifespan.
3. Thermal Stability
- Wollastonite has good thermal stability, which is crucial in brake applications. During braking, a significant amount of heat is generated, and the brake shoes need to withstand these high temperatures without significant degradation.
- It helps to dissipate heat more effectively, preventing the build – up of excessive heat that could cause the brake shoes to fade or lose their braking efficiency.
4. Environmental Friendliness
- As a natural mineral, wollastonite is a more environmentally friendly option compared to some other Brake Shoes Ingredients. It is non – toxic and does not release harmful substances during normal use or during the manufacturing process.
Storage and Packaging
Storage
- Dry Environment: Wollastonite should be stored in a dry place to prevent moisture absorption. Moisture can cause the particles to agglomerate, which may affect its performance in the Brake Shoes Formula.
- Temperature Control: It is advisable to store wollastonite at a relatively stable temperature. Extreme temperature fluctuations should be avoided as they could potentially alter the physical properties of the mineral.
- Protection from Contaminants: The storage area should be clean and free from dust, dirt, and other contaminants that could mix with the wollastonite and affect its quality.
Packaging
- Sealed Bags or Drums: Wollastonite is commonly packaged in sealed plastic bags or drums. This packaging helps to protect it from moisture and contaminants during transportation and storage.
- Labeling: Each package should be clearly labeled with information such as the product name, grade, batch number, and handling instructions. This ensures proper identification and safe handling of the wollastonite.
In conclusion, wollastonite is a valuable brake shoes ingredient that significantly contributes to the performance and durability of brake shoes. Its unique properties make it an essential part of modern brake shoes formulas. By understanding its technical parameters, advantages, and proper storage and packaging methods, manufacturers can ensure the optimal use of wollastonite in their brake shoes production.