Physical Properties of Carbonized Wood

Carbonized wood is often termed “physical preserved timber” and is also known as heat-treated wood. Originating in Europe, it has been in use for over a decade. Carbonized wood was introduced to China nearly five years ago and has gained widespread popularity due to its superior properties compared to ordinary timber and its environmentally friendly nature. Today, let us explore the advantages and disadvantages of carbonized wood.

Carbonized wood is produced through a high-temperature homogeneous carbonization process without the use of any chemical agents. This treatment gives the wood a visually appealing dark brown surface while providing decay resistance and protection against biological attacks. It features low moisture content, minimal water absorption, excellent dimensional stability, resistance to deformation, complete degreasing without resin exudation, good thermal insulation, ease of construction and finishing, and no distinctive odor. These qualities make it an ideal material for indoor and sauna applications, positioning it as an emerging trend in bathroom decor. Additionally, its resistance to decay, insect infestation, deformation, cracking, and high temperature tolerance also make it a perfect choice for outdoor poolside landscapes.

Ganshengtai Wood Carbonization Kiln Equipment

Advantages of Wood Carbonization:

1. Durability:
Carbonized wood undergoes thermal steam carbonization, which alters certain components of the wood and reduces nutrients for wood-decaying fungi, thereby inhibiting fungal growth within the wood at the food chain level. Additionally, complex chemical reactions during the process generate substances harmful to decay fungi, effectively eliminating them. As a result, carbonized wood exhibits significantly improved decay resistance and weather durability, offering protection against rot and fungal infestation.

2. Environmental Friendliness:
Wood carbonization is a purely physical technology involving only temperature and steam, with no chemical additives. Thus, carbonized wood is highly eco-friendly and safe, making it an environmentally sustainable material. Furthermore, the process enhances fast-growing wood with stability, decay resistance, and the appearance of rare hardwood, allowing it to partially replace precious wood species and contributing to environmental conservation.

3. Dimensional Stability:
Carbonization at high temperatures reduces the concentration of hydroxyl groups in wood components, lowering its hygroscopicity and internal stress. This significantly diminishes the wood’s ability to exchange moisture with the environment, greatly reducing deformation, shrinkage, and swelling caused by moisture fluctuations during use.

4. Moisture Resistance:
The carbonization process alters the water adsorption mechanism of wood. As the treatment temperature increases, hygroscopic hemicellulose degrades, reducing the wood’s moisture absorption capacity. The decrease in hydrogen bonding between water molecules and wood molecules further lowers hygroscopicity and water uptake, allowing carbonized wood to maintain low moisture content even in humid conditions.

5. Color:
Carbonized wood displays consistent color throughout, ensuring uniformity across the entire surface. The coloration is achieved physically, meaning it does not fade or change over time, maintaining its decorative effect indefinitely. Depending on the wood species and process, carbonized wood ranges from yellow to deep brown. For light-colored fast-growing woods like pine, fir, or poplar, carbonization can mimic the appearance of tropical hardwoods while providing superior stability.

6. Easy Maintenance:
During carbonization, resins and other extractives are removed from the wood, leaving the surface free of oily substances and easy to coat or finish. Additionally, due to its excellent decay resistance, stability, and moisture resistance, carbonized wood requires minimal maintenance in daily use.

7. Convenient Storage:
Carbonized wood is less prone to moisture absorption, preventing mold and insect infestation during storage. As a result, it does not require specialized warehouses or controlled temperature and humidity conditions. The high-temperature carbonization process eliminates the nutrient-rich sap that pests rely on, making the wood inhospitable to insects. When combined with surface preservative coatings, carbonized wood achieves even greater durability.

Microwave High-Temperature Shaping Equipment offers superior shaping performance for wood. Microwave heating works by interacting with polar molecules (such as water molecules) in the wood, causing molecular rotation that generates frictional heat, thereby achieving uniform heating from the inside out.