Binders are indispensable materials in ceramic forming processes, and the selection of the appropriate binder directly affects the properties of the green body and the subsequent firing quality. This article will compare and analyze common binders in the ceramic industry, helping readers understand the characteristics of different binders and providing a reference for selecting suitable ones.
Comparison Chart of Common Binders:
Binder Type | Main Component | Advantages | Disadvantages | Applicable Processes | Applicable Ceramic Types | Notes |
PVA (Polyvinyl Alcohol) | Polymer of vinyl alcohol | Excellent film-forming, bonding, and water retention properties, good dispersibility | Relatively high price, limited high-temperature resistance | Slip casting, dry pressing, extrusion | Sanitaryware, daily-use ceramics, special ceramics | Often used in combination with thickeners and defoamers |
CMC (Carboxymethyl Cellulose) | Sodium carboxymethyl cellulose | Good bonding force, thickening ability, easily dispersed in water, environmentally friendly and non-toxic | Poor water retention, limited high-temperature stability | Slip casting, dry pressing | Sanitaryware, daily-use ceramics | Suitable for products with high environmental requirements |
Starch | Starch | Low price, readily available, good dispersibility | Relatively weak bonding force, prone to decay, significant residue after burnout | Dry pressing, slip casting | Daily-use ceramics, coarse ceramics | Suitable for products with low strength requirements |
Polyacrylamide (PAM) | Polymer of acrylamide | Excellent thickening, dispersing, and stabilizing performance, small dosage with significant effect | High price, limited hydrolysis stability | Slip casting | Sanitaryware, electronic ceramics | Suitable for high-quality, high-performance ceramics |
Gelatin | Animal collagen | Good bonding force, water retention, and film-forming properties | High price, prone to decay, poor high-temperature resistance | Slip casting | Art ceramics, special ceramics | Suitable for products with high appearance requirements |
Considerations for Binder Selection:
Ceramic Type: Different types of ceramics have different performance requirements for binders.
Forming Process: Different forming processes have different requirements for the rheology and bonding force of binders.
Firing Temperature: The decomposition temperature of the binder should be lower than the firing temperature.
Environmental Requirements: Prioritize environmentally friendly and non-toxic binders.
Cost Control: Comprehensively consider the price and performance of the binder, and choose the most cost-effective one.
Technical Services from TopTime Ceramics:
TopTime Ceramics has a professional R&D team and rich practical experience, and can provide customers with customized binder solutions, helping them select suitable binders, optimize formulations, and improve product quality and production efficiency.