Ceramic Ball

Porous Ceramic Ball Catalyst

Porous Ceramic Ball (also known as Open-pored ceramic balls) are ceramic spherical products with a through or semi-through pore structure. Their core features are high porosity and large specific surface area, while retaining the inherent advantages of ceramic materials such as high temperature resistance, corrosion resistance, and high strength. They are widely used in industrial separation, catalysis, environmental protection and other fields.

product details

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Porous Ceramic Ball Core Features

Porous Structure

Pores are mostly through-hole (open porosity typically 30%-70%), with adjustable pore size (micrometer to millimeter scale). Pores are interconnected, forming a well-developed channel network, significantly increasing the specific surface area (typically 10-100 m²/g).

Resistant to Extreme Environments

Inheriting the properties of ceramic materials, they can withstand high temperatures (up to 1600°C, depending on the material), corrosion from strong acids and alkalis (for example, alumina ceramic balls are resistant to most non-hydrofluoric acid media, while silicon carbide is resistant to strong corrosion), and are unreactive with most chemicals.

Balanced Mechanical Properties

While the porous structure results in lower compressive strength than solid ceramic balls, it still surpasses most organic porous materials (such as plastic foam) and can withstand a certain load (compressive strength is typically 5-50 MPa).

Low Density and Air Permeability

The porous structure results in a density that is only 1/3-1/2 that of solid ceramic (approximately 1.0-2.5 g/cm³). Gases and liquids can penetrate the pores efficiently, resulting in excellent fluidity.

technical parameter

Item	Feldspar	Feldspar-Mola	Molai Stone	Molai-Corundum	Corundum
Al,O.(%)	20-30	30-45	45-70	70-90	290
Water Adsorption (%)	≤5	≤5	≤5	≤5	≤5
Acid Resistance (%)	≥98	298	≥98	298	≥98
Alkaki Resistance (%)	≥80	≥82	≥85	≥90	≥95
Operation Temp max(℃)	≥1300	≥1400	≥1500	≥160r	≥1700
Rlk Densit (kg/m3)	1100-1200	1200-1300	1300-1400	1400-1500	≥1500

Pore Forming Process

Porous structures are achieved by adding pore-forming agents (such as organic particles or carbon powder) or by physical foaming.

Pore-forming agent method: Volatile/combustible organic particles (such as starch or plastic balls) are mixed into the mold during molding. The pore-forming agent decomposes during sintering, leaving pores.

Foam impregnation method: Ceramic slurry is impregnated into a polymer foam skeleton. After sintering, the foam burns away, forming a porous ceramic with a foam-like structure.

Gelcasting method: Pore formation is controlled through chemical reactions, resulting in higher precision and suitable for complex shapes.