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The transformation of common kaolin clay into the high-performance material known as calcined kaolin is a testament to the power of controlled thermal processing. At NINGBO INNO PHARMCHEM CO.,LTD., we leverage this science to produce calcined kaolin powder with significantly enhanced properties, making it an indispensable ingredient across a multitude of industries.
The fundamental process of creating calcined kaolin involves subjecting naturally occurring kaolin clay to intense heat. Raw kaolin, chemically defined as hydrated aluminum silicate (Al2Si2O5(OH)4), contains chemically bound water molecules within its crystal lattice. The calcination process, typically carried out in kilns at temperatures ranging from 600°C to 1000°C, drives off this water. This removal of hydroxyl groups (-OH) leads to a restructuring of the kaolinite mineral into a more stable, anhydrous form, often referred to as metakaolin, and subsequently to phases like spinel and mullite at higher temperatures.
This thermal treatment fundamentally alters the physical characteristics of the kaolin. The particle structure becomes denser, leading to increased whiteness, brightness, and opacity. The calcination process also results in particles that are harder and more angular, which provides superior reinforcing capabilities when used as a filler in polymers. The removal of water also means calcined kaolin exhibits lower water absorption compared to its hydrous counterpart.
Understanding these transformations is key to appreciating why calcined kaolin is preferred in many applications. For instance, its inert nature and thermal stability make it ideal for high-temperature ceramic firing. In paints and coatings, the enhanced whiteness and opacity, coupled with the fine particle size, contribute to superior optical performance and can significantly reduce the need for more expensive pigments.
The scientific precision in controlling the calcination temperature and duration allows NINGBO INNO PHARMCHEM CO.,LTD. to tailor the properties of calcined kaolin to meet specific industrial requirements. Whether it’s for improved mechanical strength in plastics and rubber, enhanced hiding power in paints, or stable white pigments for ceramics, the science behind calcined kaolin production ensures its efficacy. By choosing to buy calcined kaolin from NINGBO INNO PHARMCHEM CO.,LTD., you are investing in a material engineered for peak performance.
Manufacturing Facilities
Professional Export Experience
to Global Customers
1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
2. Own R&D laboratory, pilot platform and large-scale production workshop, which can meet the audit requirements of global customers;
3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
A: We don't have Minimum Order Quantity, exact quantity should be provided before quotation for us to calculate the exact cost.
A: We don't provide free samples due to lots of request and expensive international courier's cost, we can deduct the sample charge after commercial order placed.
A: Our payment terms: Small or sample order: T/T IN ADVANCE. Commercial order: First order should be by T/T IN ADVANCE or L/C at sight, and following orders T/T 30~90days is acceptable subject to approval of credit application.
