In the field of ceramic bodies, glazes and ceramic additives, sodium carboxymethyl cellulose (hereinafter referred to as "CMC for Ceramics") has become an indispensable green additive. It can not only improve the fluidity of mud, but also enhance the strength of green bodies and reduce the breakage rate. Faced with a wide range of CMC models on the market, how can we quickly lock in the optimal solution for "CMC for Ceramics"? This "Selection and Application Guide for CMC for Ceramics" will take you through the entire process from product selection to implementation in 5 minutes.
I. The core role of CMC for Ceramics
1. Thickening and water retention
CMC for Ceramics can form a three-dimensional network structure in the mud, significantly increase viscosity, prevent particle sedimentation; at the same time, lock in moisture and delay drying and cracking.
2. Bonding and reinforcement
During the green stage, Sodium CMC forms a thin film between ceramic particles, increasing the wet strength by 30–50% and reducing damage during transportation.
3. Dispersion and lubrication
Na CMC acts as a dispersant in ceramic glazes, reducing ball milling time, energy consumption, and improving glaze surface smoothness.
II. Four key indicators for selecting CMC for ceramics
|
Index |
Recommended range |
Function description |
|
Degree of substitution (DS) |
0.7–1.0 |
Considering both solubility and bonding strength |
|
Viscosity |
800–3000 mPa·s |
High viscosity for grouting and low viscosity for spray drying |
|
Purity |
≥99% |
Few impurities, no black spots after firing |
|
Particle size |
80–120 mesh |
Easy to disperse quickly, no agglomeration |
Tips: Click here to view our CMC for ceramics product details page, where you can download the technical parameter table with one click.
III. Typical application cases of CMC for ceramics
1. High-pressure grouting of sanitary ceramics
Using CMC in the high-pressure grouting process of ceramics can reduce the water content of the slurry by 2–3%, shorten the demoulding time by 15%, and save about 8% of energy consumption annually.
2. Daily-use ceramic glaze
Adding 0.15% of CMC for ceramics, the yield value of the glaze slurry decreases by 20%, and the pinhole rate of the glaze surface decreases by 40%, greatly improving the rate of high-quality products.
3. Refractory ceramic fiber
CMC for ceramic industry used plays a temporary bonding role in the molding of ceramic fibers. The residual carbon after firing is less than 0.1%, which does not affect the high-temperature performance.
IV. Common Problems and Solutions of CMC for Ceramics
|
Problem |
Cause Analysis |
Solution |
|
Viscosity drops suddenly |
Water hardness is too high, calcium and magnesium ions interfere |
Use salt-resistant CMC for ceramics |
|
Insufficient green strength |
DS is too low or the amount added is insufficient |
Adjust the dosage to 0.2-0.4% |
|
Glaze bubbles |
Stirring speed is too fast |
Reduce the speed and feed in batches |
V. Procurement Tips: How to Get the Best Quote Quickly
1. Clarify the demand: green body or glaze? Wet process or dry process.
2. Provide parameters: DS, viscosity, particle size, packaging form (25 kg or ton bag).
3. Request samples: Click on the CMC sample application for ceramics to get a 1 kg test package for free.
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Conclusion
With the surging demand for green and efficient additives in the ceramic industry, "CMC for ceramics" is moving from a supporting role to a leading role. Through precise selection and reasonable application, the value of CMC in ceramics will be further magnified. If you are looking for stable and efficient CMC for ceramics, please contact us immediately to get exclusive technical solutions and the latest quotes!
