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πŸ”§ Defect Troubleshooting

πŸ”§ Defect Troubleshooting

20 articles

Diagnose and fix ceramic production defects caused by flux and raw material issues. Every defect links to a product solution.

Crazing: Glaze Cracking from Expansion Mismatch

Fix with nepheline in body + K-feldspar in glaze

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Poor Whiteness: High Iron in Your Flux

Switch to K200 (Fe2O3 0.08%) for immediate improvement

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Black Specks: Iron Particle Contamination

Wet processing eliminates steel grinding contamination

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Glaze Crawling: Flux Chemistry Fix

Add nepheline to lower surface tension

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Pinholing: Gas Escape Through Sealed Glaze

K200 fine particle accelerates glaze healing

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Warping: Uneven Vitrification

Nepheline wide firing range reduces sensitivity

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Bloating: Over-Fluxing Correction

Reduce nepheline 3-5% or lower temperature

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High Water Absorption: Insufficient Flux

Increase nepheline or switch K100β†’K200

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Glaze-Body Expansion Mismatch

Nepheline body + K-feldspar glaze strategy

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Yellow Fired Color: Tracing Iron Source

Step-by-step diagnostic to identify the culprit

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Inconsistent Color: Batch Variation

Switch to consistent wet-process supplier

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Narrow Firing Range: Temperature Sensitivity

Nepheline widens range by 20-40Β°C

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Excessive Shrinkage: Over-Fluxing

Reduce nepheline 2-4%, compensate with quartz

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Poor Glaze Adhesion

Optimize engobe + body vitrification

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Sanitary Ware Deformation

SY101 high-viscosity melt prevents slumping

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Poor Translucency in Tableware

K200 at 28-32% for clear glass phase

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Non-Uniform Matte Glaze

GP20 CaO for consistent devitrification

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High Energy Costs: Lower Firing Temperature

Nepheline saves 5-10% gas consumption

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Raw Material Inconsistency

Wet-process supplier with 10-batch COA data

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Low Strength: Under-Vitrification

Increase nepheline + alumina strengthening

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