1. Why Ceramic Binder Dosage Matters

Green strength problems are often treated as a simple product-selection issue, but in production the more common problem is an unverified dosage window. A binder that performs well at the correct dosage may fail when it is under-dosed, and the same binder may create new defects when it is over-dosed.

In a ceramic body, binder dosage affects four variables at the same time: particle-to-particle cohesion, slurry viscosity, drying behaviour and firing behaviour. A correct optimization process must therefore look beyond strength improvement alone. The goal is not the highest possible binder addition; the goal is the lowest stable dosage that reaches the required handling strength while preserving downstream processability.

2. Starting Dosage by Binder Type

The following ranges are starting points for laboratory evaluation, not final production guarantees. Actual dosage depends on body formula, clay content, particle size distribution, water quality, pressing pressure, drying schedule and kiln conditions.

3. How to Run a 5-Point Dosage Curve

A five-point dosage curve is the simplest way to identify the effective dosage window. It prevents two common mistakes: using too little binder because the first trial looks expensive, or using too much binder because the first improvement is encouraging.

1. Prepare a zero-binder control.
   Use your current production body formula without extra binder. Measure baseline dry MOR, slurry flow time, edge strength and drying behaviour.
2. Select five dosage points.
   For inorganic binders, a practical lab sequence may be 0.5%, 0.8%, 1.2%, 1.6% and 2.0%. For organic polymeric binders, a practical sequence may be 0.2%, 0.4%, 0.6%, 0.8% and 1.0%. Adjust the range according to your own formula and supplier guidance.
3. Keep all process conditions constant.
   Use the same slurry solid content, water quality, milling time, moisture content, pressing pressure, drying temperature and sample dimensions for every dosage point.
4. Measure dry MOR.
   Use a consistent three-point bending method on dried green bars. Record the average and variation; do not judge performance from one sample only.
5. Measure slurry processability.
   Check Ford Cup flow time or rotational viscosity after binder addition. A binder dosage that improves MOR but creates unacceptable viscosity is not a production-ready solution.
6. Dry and fire pilot samples.
   Observe drying cracks, warpage, shrinkage, fired colour and black-core risk. Organic binder systems must always be validated in the real firing schedule.
7. Choose the lowest dosage that passes all indicators.
   The optimum point is not always the highest MOR value. It is the lowest dosage that meets strength, flow, drying, firing and cost requirements together.

4. Testing Indicators: MOR, Viscosity and Drying Behaviour

Dry MOR is the core laboratory indicator, but it should not be used alone. Production failures usually happen because one indicator improved while another became worse.

5. When to Choose Inorganic vs Organic Binders

Inorganic and organic ceramic binders work through different mechanisms, so they should not be treated as interchangeable. The right choice depends on the body formula and production bottleneck.

Choose ZG-302 / ZG-303 first when:

• The ceramic body has normal plastic clay content and only needs moderate green-strength improvement.
• Slurry viscosity stability is a priority in wet-process tile production.
• The production team wants a cost-effective base solution with lower organic burn-out risk.
• The issue is edge breakage or handling weakness, but not severe strength failure in a lean body.

Choose FG-ZM01A / FG-ZM01D first when:

• The body contains high quartz / feldspar and low plastic clay content.
• The product is large-format, ultra-thin or dry-pressed and requires higher dry strength.
• The current inorganic binder addition cannot reach the MOR target within a practical dosage range.
• The plant can run controlled drying and firing validation to manage organic burn-out risk.

6. Troubleshooting Common Dosage Problems

FAQ