Ceramic grade CMC adhesive

The Role of Ceramic-Grade CMC

Adding CMC to raw materials enhances their binding strength, making the material easier to shape, increasing flexural strength by 2-3 times, and improving the stability of the raw material. This makes it more suitable for machining ceramic products, reducing processing costs. Furthermore, the addition of "modified CMC" not only increases the processing speed of green bodies and reduces production consumption, but also allows for uniform evaporation of moisture in the raw material, preventing drying cracks and increasing the yield of high-quality products.

CMC can be used as an anti-settling agent, emulsifier, dispersant, leveling agent, and binder in coatings (putty/powder). It enables the solids content of the coating to be evenly distributed in the solvent, preventing the coating from separating over a long period. It is also widely used in paints.

Main Functions of Ceramic Grade CMC:

1. In ceramic production, prolonged storage of slurry can lead to particle sedimentation and stratification, affecting product quality. Ceramic grade CMC significantly improves the suspension properties of the slurry, preventing solid particle sedimentation, maintaining slurry uniformity, and improving production efficiency.
2. The viscosity symmetry and processing properties of ceramic slurry are crucial. Ceramic grade CMC reduces slurry viscosity, improves its fluidity, and makes the slurry flow more smoothly in petroleum, casting, or other molding processes, reducing clogging and unevenness.
3. During ceramic molding, the cohesive force of the slurry directly affects the strength of the green body. Ceramic grade CMC enhances the interaction between particles, improves the mechanical strength of the green body, reduces defects such as cracking and deformation, and makes ceramic products more robust and durable.
4. The fluidity and adhesion properties of glazes determine the surface quality of ceramic products. Ceramic grade sodium carboxymethyl cellulose improves the dispersibility of glazes, making the glaze surface smoother and more uniform, increasing gloss, reducing defects such as bubbles, runs, and shrinkage cavities, and making ceramic products more aesthetically pleasing. 5. The adhesion of the glaze layer directly affects the service life of ceramic products. Ceramic-grade CMC enhances the adhesion of the glaze to the body, preventing the glaze layer from peeling or cracking during sintering, thus improving the durability and stability of the finished product.
6. Adding CMC to ceramic clay enhances its plasticity and workability, making it easier to shape. Simultaneously, it increases the strength of the body, reduces cracking during drying, and improves the yield of qualified finished products after sintering.
7. In ceramic production, the drying rate and shrinkage uniformity of the body determine the quality of the final product. CMC for ceramics can regulate the rate of moisture evaporation, prevent cracking during drying, and improve the density of the product.