CMC for Ceramic

Analysis of the Functions of CMC in the Ceramic Industry

In the ceramic industry, CMC serves as an excipient, plasticizer, and strengthening agent for ceramic bodies. When incorporated into both underglazes and top glazes for ceramic tiles, it maintains the glaze slurry in a stable, dispersed state. In printing glazes, its application primarily leverages its thickening, binding, and dispersing properties.

Functions of CMC for Ceramics in Tile Underglazes and Glazes

1. Maintains the glaze slurry in a stable dispersed state;
2. Increases the surface tension of the glaze material;
3. Retards the diffusion of water from the glaze into the ceramic body;
4. Enhances the smoothness of the glaze surface;
5. Prevents cracking during conveyance and printing discontinuities caused by a reduction in the ceramic body's strength following glaze application;
6. Minimizes pinholes in the glaze surface after firing.

Functions of CMC in Ceramic Bodies

1. Enhances the binding strength of the ceramic batch, facilitating easier body formation;
2. Increases the flexural strength of the ceramic body, effectively reducing breakage rates;
3. Promotes uniform moisture evaporation within the batch, thereby preventing drying cracks.

Application Scenarios and Practical Examples

Tableware Ceramics: For products such as cups, bowls, and plates, Ceramic-Grade CMC significantly improves molding efficiency and surface finish;
Architectural Ceramics: Used in tiles, mosaics, and similar products to enhance glaze uniformity and minimize glaze cracking;
Specialty Ceramics: In applications such as high-temperature structural ceramics, the moisture-control function of CMC contributes to the stability of the precision firing process;
Decorative Glazes: Improves surface adhesion and line definition, while minimizing issues related to color bleeding and blurring.

CMC for Ceramics: Storage Conditions

Protection Against Moisture and Humidity
As the product is hygroscopic, it should be stored in a dry, well-ventilated warehouse. Avoid direct contact with the floor and walls; it is recommended to use pallets to elevate the product, thereby preventing moisture absorption and subsequent caking.

Protection Against Light and Heat
Keep the product away from heat sources and direct sunlight. Storage temperatures should not be excessively high (preferably below 35°C) to prevent high temperatures from degrading product performance or causing spoilage.

Sealed Storage; Avoid Mixed Storage
Once opened, the product must be kept tightly sealed to prevent the ingress of moisture and impurities. Do not store alongside acids, alkalis, oils, or volatile chemicals, as this may lead to contamination or adverse chemical reactions.