Alumina hollow sphere products
Application Industry: Lightweight Refractory Products
Application Equipment: Ceramics, Electric Porcelain, Grinding Wheels, Refractory, and Other Industries Kiln Working Lining and Thermal Insulation
Size: Custom alumina hollow sphere products geometry per high-temperature kiln design (free engineering on request)
Products Overview
Our Alumina hollow sphere products is a high-performance refractory product engineered for ceramics, electric porcelain, grinding wheels, refractory, and other industries kiln working lining and thermal insulation service. Alumina hollow sphere products are made from alumina hollow spheres, corundum powder, calcined powder, etc., which are homogenized, shaped and sintered at high temperature. The product has the characteristics of high temperature resistance, acid and alkali resistance, low thermal conductivity, good thermal insulation performance, and small bulk density. It is mainly used for working linings and thermal insulation of various high-temperature kilns in the ceramics, electric porcelain, grinding wheels, refractory, and other industries lining.
The Alumina hollow sphere products family is offered in three engineering-proven KXQ chemistry grades. The CH-KXQ88 grade features Al2O3 content minimum 88% for general high-temperature kiln working lining service, with Fe2O3 content maximum 0.3 percent, Bulk Density 1.30-1.45 g/cm3, Cold Crushing Strength minimum 10 MPa, Load Softening Temperature minimum 1650 °C at 0.2 MPa, Reheating Line Change maximum plus or minus 0.3 percent after 1600 °C drying for 3 hours, Thermal Expansion Coefficient approximately 8.0 times 10 to the negative 6 per °C at 1300 °C, Thermal Conductivity maximum 0.9 W/m.k at 800 °C, and Maximum Service Temperature 1650 °C. The CH-KXQ98 grade features Al2O3 content minimum 99% for higher-demand high-temperature kiln working lining service, with Fe2O3 content maximum 0.15 percent, SiO2 content maximum 0.2 percent, Bulk Density 1.40-1.65 g/cm3, Cold Crushing Strength minimum 9 MPa, Load Softening Temperature minimum 1700 °C at 0.2 MPa, Reheating Line Change maximum plus or minus 0.3 percent after 1600 °C drying for 3 hours, Thermal Expansion Coefficient approximately 8.6 times 10 to the negative 6 per °C at 1300 °C, Thermal Conductivity maximum 1.0 W/m.k at 800 °C, and Maximum Service Temperature 1800 °C. The CH-KXQ98 Sialon grade features ZrO2 content minimum 9.8% for highest-demand high-temperature kiln working lining service, with Fe2O3 content maximum 0.2 percent, SiO2 content maximum 0.2 percent, Bulk Density maximum 3.0 g/cm3, Cold Crushing Strength minimum 8 MPa, Load Softening Temperature minimum 1700 °C at 0.2 MPa, Reheating Line Change maximum plus or minus 0.2 percent after 1600 °C drying for 3 hours, Thermal Conductivity maximum 0.5 W/m.k at 800 °C, Maximum Service Temperature 2000-2200 °C, and Thermal Shock Resistance minimum 15 cycles at 1100 °C water cooling.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Alumina hollow sphere products grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Lightweight Refractory Products category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured by Zhengzhou caihua with alumina hollow spheres, corundum powder, calcined powder, and other raw materials by homogenization, shaping, and high-temperature sintering
- Engineering-proven characterized with high temperature resistance, acid and alkali resistance, low thermal conductivity, good thermal insulation performance, and small bulk density
- Three KXQ chemistry grades covering Al2O3 content minimum 88-99% and Maximum Service Temperature 1650-2200 °C for matching different high-temperature kiln working lining and thermal insulation service requirements
- Bulk Density 1.30-3.0 g/cm3 and Cold Crushing Strength minimum 8-15 MPa depending on grade for high-temperature kiln service
- Mainly used for working linings and thermal insulation of various high-temperature kilns in the ceramics, electric porcelain, grinding wheels, refractory, and other industries lining
Product Specification
Alumina hollow sphere products
Alumina hollow sphere products are made from alumina hollow spheres, corundum powder, calcined powder, etc., which are homogenized, shaped and sintered at high temperature. The product has the characteristics of high temperature resistance, acid and alkali resistance, low thermal conductivity, good thermal insulation performance, and small bulk density. It is mainly used for working linings and thermal insulation of various high-temperature kiln in the ceramics, electric porcelain, grinding wheels, refractory and other industries lining.
| Brands / Items | Alumina hollow sphere | Sialon bonded Al2O3 hollow sphere brick | |||
|---|---|---|---|---|---|
| CH-KXQ88 | CH-KXQ98 | CH-KXQ98 | – | ||
| Maximum use temperature (°C) | 1650 | 1800 | 2000-2200 | 1600 | |
| Al2O3 (%) ≥ | 88 | 99 | – | 70 | |
| ZrO2 (%) ≥ | – | – | 9.8 | – | |
| SiO2 (%) ≤ | – | 0.2 | 0.2 | – | |
| Fe2O3 (%) ≤ | 0.3 | 0.15 | 0.2 | N≥5 | |
| Bulk density (g/cm³) | 1.30~1.45 | 1.40~1.65 | ≤ 3.0 | ≤ 1.5 | |
| Cold crushing strength (MPa) ≥ | 10 | 9 | 8 | 15 | |
| Load softening temperature (°C) ≥ (0.2MPa, 0.6%) |
1650 | 1700 | 1700 | 1700 | |
| Reheating linear change (%) (1600°C × 3hrs) |
±0.3 | ±0.3 | ±0.2 | – | |
| Thermal expansion coefficient ×10-6 (cdd -1300°C) |
~8.0 | ~8.6 | – | Thermal shock resistance ≥15 (1100°C water cooling) |
|
| Thermal conductivity (W/m.K) (at 800°C) ≤ |
0.9 | 1.0 | 0.5 | 1.1 | |
| Application | It is used as the heat insulation lining of carbon black furnace in petrochemical industry, and the inner lining of high temperature furnaces such as ceramics and refractories. | Used for firing hard and super hard alloy vacuum intermediate frequency ultra-high temperature furnace lining and heat insulation layer, and also can be used for other 2000~2200°C ultra-high temperature furnace lining | Used as the hot surface lining of 1400~1600°C ceramic kiln and other high temperature kiln. | ||
Note: Twelve performance parameters specified per source image: Maximum use temperature, Al2O3, ZrO2, SiO2, Fe2O3, Bulk density, Cold crushing strength, Load softening temperature, Reheating linear change, Thermal expansion coefficient, Thermal conductivity, and Application. Four chemistry grades engineered for ceramics, electric porcelain, grinding wheels, refractory and other industries lining. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
Alumina hollow sphere products is a high-performance refractory product engineered for ceramics, electric porcelain, grinding wheels, refractory, and other industries kiln working lining and thermal insulation service. Alumina hollow sphere products are made from alumina hollow spheres, corundum powder, calcined powder, etc., which are homogenized, shaped and sintered at high temperature. The product has the characteristics of high temperature resistance, acid and alkali resistance, low thermal conductivity, good thermal insulation performance, and small bulk density. The alumina hollow sphere products family is mainly used for working linings and thermal insulation of various high-temperature kilns in the ceramics, electric porcelain, grinding wheels, refractory, and other industries lining, with stable quality and good engineering performance across the global lightweight refractory products value chain.
Application Industry: Lightweight Refractory Products.
Target Equipment: Ceramics, Electric Porcelain, Grinding Wheels, Refractory, and Other Industries Kiln Working Lining and Thermal Insulation of small, medium-size, and large industrial operations across the global lightweight refractory products value chain.
Specific Application Zones: The CH-KXQ88 grade (Al2O3 content minimum 88%) is the standard variant engineered for high-temperature kiln working lining service, with Cold Crushing Strength minimum 10 MPa, Load Softening Temperature minimum 1650 °C, and Maximum Service Temperature 1650 °C. The CH-KXQ98 grade (Al2O3 content minimum 99%) is the higher-demand variant engineered for high-temperature kiln working lining service, with Cold Crushing Strength minimum 9 MPa, Load Softening Temperature minimum 1700 °C, and Maximum Service Temperature 1800 °C. The CH-KXQ98 Sialon grade (ZrO2 content minimum 9.8%) is the highest-demand variant engineered for high-temperature kiln working lining service, with Cold Crushing Strength minimum 8 MPa, Load Softening Temperature minimum 1700 °C, and Maximum Service Temperature 2000-2200 °C. All three grades deliver low thermal conductivity, good thermal insulation performance, and small bulk density for ceramics, electric porcelain, grinding wheels, refractory, and other industries kiln working lining and thermal insulation service, with stable quality and good engineering performance across the global lightweight refractory products value chain.
CH Refractories is an Alumina hollow sphere products manufacturer in China, Henan, Zhengzhou. The complete Alumina hollow sphere products family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each batch is supported by free consultation, on-site technical support, and a dedicated engineering team serving Lightweight Refractory Products customers across the global lightweight refractory products value chain.
