Application of the Sodium Carboxymethyl Cellulose in the Ceramic Industry

The sodium carboxymethyl cellulose, also known as CMC, is widely used as an excipient, plasticizer, and strengthening agent for blanks in the ceramic industry. It is mainly used in the base glaze and top glaze of ceramic tiles. Correct use of sodium carboxymethyl cellulose can make the ceramic glaze in a stable dispersion state.

1. Application of the sodium carboxymethyl cellulose in ceramic body

The sodium carboxymethyl cellulose has a unique linear polymer structure. When CMC is added to water, its hydrophilic group combines with water to form a solvation layer, so that CMC molecules are gradually dispersed in the water. The CMC polymers rely on hydrogen bonds and the effect of van der Waals forces to form a network structure, thus showing cohesiveness. CMC for ceramic embryos can be used as excipients, plasticizers, and intensifiers for embryos in the ceramic industry:

(1) Increase the processing speed of the green body and reduce the energy consumption of production;

(2) Good ignition loss, no residue after ignition, and does not affect the green color;

(3) Facilitate process operation and prevent defects such as glaze rolling and lack of glaze;

(4) It has a decoagulation effect, can improve the fluidity of the glaze slurry, and facilitate the operation of glaze spraying;

(5) As a blank excipient, it increases the plasticity of the mud and sand material and facilitates the forming of the blank;

(6) Strong resistance to mechanical abrasion, less damage to molecular chains during ball milling and mechanical stirring;

(7) The sodium carboxymethyl cellulose is used as a blank reinforcing agent to increase the flexural strength of the blank, improve the stability of the blank, and reduce the damage rate;

(8) With strong suspension and dispersion, it can prevent the agglomeration of barren raw materials and color paste particles, and make the slurry uniformly dispersed;

(9) Evenly evaporate the moisture in the blank to prevent drying and cracking. It is especially applied to large-size floor tile blanks and polished tile blanks with obvious effects.

Jining Fortune Biotech Co.,Ltd. is a reliable sodium carboxymethyl cellulose supplier, and provides quality sodium carboxymethyl cellulose.

2. Application of the sodium carboxymethyl cellulose in ceramic glaze slurry

The sodium carboxymethyl cellulose belongs to the polyelectrolyte category. It is mainly used as a binder in the glaze slurry, and at the same time, it has a suspending effect. When CMC is added to the glaze slurry, water penetrates into the CMC glue block, and the hydrophilic group combines with water to produce water-absorbing swelling. At the same time, the inside of the micelle is hydrated and swelled, and the outside forms a bound water layer. The micelle is free from the glue in the initial dissolution stage. In the liquid, due to the asymmetrical size and shape, and the regular interference with each other through van der Waals forces, the combined water layer gradually forms a network structure, which is large in volume, so it has strong adhesion:

(1) Under the condition of low dosage, it can effectively adjust the rheology of glaze slurry and facilitate glaze application;

(2) Improve the bonding performance of the glaze, significantly increase the strength of the glaze, and prevent deglaze;

(3) The glaze is highly delicate, the glaze slurry is stable, and at the same time it can reduce the pinholes of the glaze after sintering;

(4) With excellent dispersibility and protective colloid performance, it can make the glaze slurry in a stable dispersion state;

(5) Effectively increase the surface tension of the glaze, prevent water from spreading from the glaze to the body, and increase the smoothness of the glaze;

(6) Avoid cracking and printing breakage during conveying due to the decrease of the strength of the body after glazing.