Introduction
The dosage of ceramic and sanitary ware dispersants is closely related to the stability of the slurry. An appropriate dosage ensures that the slurry remains evenly dispersed and well-flowing after prolonged standing, preventing sedimentation and stratification and guaranteeing product quality. An insufficient dosage may lead to inadequate dispersion, sedimentation, and clumping, affecting product formation. An excessive dosage may result in the slurry becoming too thin, a decrease in viscosity, and unstable slurry performance, among other issues.
The relationship between dispersant dosage and slurry stability
Insufficient quantity: | Moderate amount: | Excessive dosage: | ||
The dispersant adsorbed on the particle surface is insufficient, unable to effectively isolate the electrostatic repulsion between particles or spatial steric hindrance, making particles prone to aggregation and sedimentation, resulting in poor slurry stability and easy layering and settling. This affects the uniformity and fluidity of the product, potentially leading to difficulties in molding and defects in the final product. | The particle surface adsorbs a sufficient amount of dispersant, generating enough repulsion between particles to maintain the stable dispersion state of the slurry. The slurry exhibits good fluidity and suspension properties, capable of maintaining uniformity for extended periods, facilitating transportation and molding, and ensuring stable product quality. | The slurry is too thin, which will decrease viscosity, although the fluidity is good, it may affect stacking and bonding during the forming process. Excessive dispersants may lead to unstable slurry performance, such as causing the 'alkali leaching' phenomenon in some cases, thereby reducing the overall performance of the material. |
| Optimal dosage: | |
The amount of dispersant needs to be adjusted according to the raw materials and process. Different ceramic raw materials (such as clay, alumina, etc.) have different surface properties and particle sizes, resulting in different demands for dispersants. For example, fine particles or high-reactive raw materials may require more dispersant. Additionally, the production process (such as ball milling time, mixing speed) also affects the dispersion effect, which needs to be optimized comprehensively. The amount of dispersant directly determines the stability and processability of the slurry, making it a key process parameter in ceramic and sanitary ware production. |  |
The dosage of dispersant is a key parameter in the precise control of ceramic slurry preparation. Insufficient dosage will lead to particle aggregation and sedimentation, while excessive dosage will cause the slurry to become too dilute and result in performance instability. The optimal dosage must be accurately determined through systematic experiments based on the characteristics of the raw materials and process requirements to achieve the best balance between fluidity, suspension, and formability of the slurry. A deep understanding and effective control of this relationship are the core technical guarantees for ensuring high-quality ceramic sanitary ware and stable production.