As a kind of ceramics, the production process of electric porcelain is relatively complicated and strict, and research is still being done to continuously improve the performance of electric porcelain in production. Because sodium carboxymethyl cellulose is widely used, it can play a greater advantage in electric porcelain.
In order to enhance the mechanical strength, aesthetics and anti-fouling ability of electric porcelain, a layer of glaze needs to be applied to the surface of electric porcelain. However, in the production of electric porcelain, there are often phenomena such as glaze, deglazing, and glaze bubbles, which will cause great losses. It is found that adding sodium carboxymethyl cellulose to the glaze can have a good effect.
The physical and chemical indicators of sodium carboxymethyl cellulose have been emphasized many times, so we will not say more. Here we point out the important chemical indicator(pH). When the pH is >10 or <5, the viscosity of the glue is significantly reduced, and the performance is better when the pH is 7. CMC-Na is often used as an anti-settling agent, emulsifier, dispersant, leveling agent and adhesive of coatings, which can make the solid components of the coating evenly distributed in the solvent, so that the coating does not delaminate for a long time. In addition, it can also be used as a flocculant, a chelating agent, a thickening agent, a water-retaining agent and a sizing agent. The application in electric enamel is mainly due to its good dispersion and nodularity.
There are two ways to add sodium carboxymethyl cellulose to the pulp:
1. Directly mix the powder of sodium carboxymethyl cellulose into the glaze slurry and stir to dissolve.
2. First dissolve sodium carboxymethyl cellulose in water, then mix CMC-Na aqueous solution with glaze slurry.
In the production of electric porcelain, sodium carboxymethyl cellulose can improve the use effect of the surface glaze of electric porcelain and can also play a good dispersion and nodularity. It can play a bigger role while improving its performance.