Rigid Fiber Board for High-Temperature Furnace Linings
Polycrystalline Alumina Fiber is a high-temperature insulation board with a defined structural strength. It is produced mainly from crushed refractory fiber cotton combined with an inorganic binder. The mixture is formed through a wet vacuum suction filtration process to create a rigid board structure.
Compared with loose fiber cotton or flexible fiber felt, this product offers a more stable board form while maintaining relatively low density. It can be installed as a furnace hot-face lining, thermal insulation layer, or supporting insulation component inside high-temperature equipment.
The board can directly face flame and high-temperature gas flow. It is suitable for industrial furnaces, heat treatment equipment, laboratory high-temperature furnaces, and other systems requiring a lightweight refractory lining.
Multiple Grades from 1260°C to 1800°C
The product range includes NC1260, NC1350, NC1400, NC1430, NC1600, NC1700, and NC1800. Classification temperatures extend from 1260°C to 1800°C.
Bulk density differs according to the selected grade. NC1260 through NC1600 have a density range of 300–600 kg/m³, while NC1700 and NC1800 are supplied at 450–700 kg/m³.
The grades also differ in alumina content, flexural strength, thermal conductivity, and permanent linear change after heating. For this reason, selection should consider furnace temperature, hot-face position, gas-flow erosion, and structural requirements rather than relying only on the highest classification temperature.
For example, flexural strength is at least 0.5 MPa for NC1260 through NC1430, while NC1600 through NC1800 reach at least 0.7 MPa.
Integrated Board Forming and Precision Processing
Zhejiang Nengcheng Crystal Fiber Co., Ltd. has established an integrated production process covering fiber raw materials, fiber formation and crystallization, wet vacuum forming, and finished-product machining.
For rigid fiber boards, density, thickness, flatness, and structural strength all affect installation and furnace performance. The production team coordinates raw material formulation, suction filtration forming, and subsequent processing to control these factors.
The company also operates an independent physical and chemical testing laboratory and has personnel responsible for material development, production processes, and quality control.
For vacuum annealing furnaces, box-type heat treatment furnaces, powder metallurgy equipment, and laboratory electric furnaces, technical staff can discuss the appropriate board grade according to the actual working conditions.
Custom Processing, Inspection and Delivery
Polycrystalline Alumina Fiber can be supplied for equipment manufacturing, furnace lining modification, or spare-part purchasing. OEM, ODM, and non-standard processing can be discussed according to technical drawings or physical prototypes.
Samples can be supplied before volume production to confirm material grade, density, and processing results.
Standard products normally require 15–25 working days for production. Customized products generally require 20–45 days. Photos or videos can be provided during production to help buyers follow order progress.
Finished products are normally inspected before packaging, and third-party inspection is accepted. Depending on order and transportation requirements, boards can be packed in cartons, wooden cases, or on wooden pallets to reduce the risk of impact or breakage during handling and international transportation.
Product Specifications
|
Parameter |
Specification |
|
Product Grades |
NC1260, NC1350, NC1400, NC1430, NC1600, NC1700, NC1800 |
|
Classification Temperature |
1260°C–1800°C |
|
Bulk Density |
NC1260–NC1600: 300–600 kg/m³; NC1700–NC1800: 450–700 kg/m³ |
|
Flexural Strength |
NC1260–NC1430: ≥0.5 MPa; NC1600–NC1800: ≥0.7 MPa |
|
Al₂O₃ Content |
45%–49%, 52%–55%, 54%–57%, 44%–48%, 72%, 78%, 83% |
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