In the structure of a wood-burning stove, the upper area of the firebox is often overlooked, yet it is a critical functional zone. This area is continuously exposed to high-temperature flue gases and plays a direct role in combustion completeness and heat utilization efficiency. As modern wood stoves evolve toward higher efficiency and lower emissions, the baffle—one of the key components in this high-temperature zone—has also undergone material upgrades. Traditional cast-iron or steel baffles are increasingly being replaced by ceramic blankets, which have become a practical solution for modern high-efficiency stoves.
Limitations of traditional metal baffles in high-temperature zones
In many conventional wood stoves, baffles are typically made from cast iron or steel. While metal offers good mechanical strength, long-term operation at high temperatures reveals several limitations:
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High thermal conductivity causes heat to be rapidly transferred away
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Repeated thermal cycling leads to oxidation and deformation
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Relatively heavy weight increases structural load and complicates installation and maintenance
How ceramic blanket improves wood stove performance
Ceramic blankets offer excellent thermal insulation and high-temperature resistance, making them well suited to the operating conditions of stove baffles. They improve wood stove performance in several key ways:
Improved insulation and heat retention
CCEWOOL® ceramic blanket is manufactured with shot content controlled below 15%. Shot content is a key factor affecting thermal conductivity—lower shot levels result in more stable insulation performance. At 800 °C, the thermal conductivity is approximately 0.30 W/(m·K), effectively reducing heat loss to the flue. This helps retain high temperatures inside the firebox, supports secondary combustion, and improves overall fuel utilization.
Lightweight and durable, easier to install and maintain
Available in multiple densities, ceramic blanket is lightweight and reduces structural load on the stove. Using a double-sided internal needle-punched process, the tensile strength exceeds 85 kPa. The material also offers good thermal shock resistance, allowing it to withstand frequent heating and cooling cycles, which simplifies installation and long-term maintenance.
Stable performance under high-temperature conditions
Ceramic blanket is non-combustible and maintains stable properties under prolonged exposure to high temperatures and flue-gas flow. Compared with metal baffles, it shows less performance degradation over time. To further ensure consistency for high-temperature baffle applications, CCEWOOL® ceramic blanket applies its proprietary Fiber Micro-defect Detection System Based on Image Recognition Technology V1.0 based on image recognition, which automatically identifies microscopic fiber defects, improving product consistency and reducing quality variation.
In wood-burning stoves, the upper firebox area where the baffle is installed is a zone of concentrated heat and flue gases. Material performance in this area directly affects temperature distribution, secondary combustion conditions, and heat utilization efficiency. Compared with metal baffles that conduct heat quickly and are prone to thermal fatigue, CCEWOOL® ceramic blankets provide a more suitable solution through stable insulation performance, reliable high-temperature behavior, and lightweight construction—making them well aligned with the operating demands of modern wood stoves.
Post time: Dec-22-2025
