The Ultimate Guide to Heat-Resistant Al2O3 Ceramic Sintering Plates and Blocks

(Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block)

Why Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block Has Good Characteristics

1.1 Exceptional Thermal Stability

Heat resistance alumina ceramic sintering plates maintain structural integrity up to 1750°C due to strong ionic bonds between aluminum and oxygen atoms. This atomic structure prevents deformation at extreme temperatures, outperforming metals and polymers. The high-temperature resistance stems from alumina’s inherent stability, with 99.6% Al2O3 formulations offering optimal performance in sustained thermal environments.

1.2 Superior Mechanical Properties

Al2O3 ceramic blocks achieve Vickers hardness ratings of 15-18 GPa, providing exceptional wear resistance against abrasive materials. Their compressive strength exceeds 2000 MPa, enabling load-bearing applications in furnace settings. This durability results from high-density sintering that eliminates porosity, creating a homogeneous microstructure resistant to mechanical degradation.

What Is Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block

2.1 Composition and Structure

These specialized ceramic components consist of 92-99.8% aluminum oxide (Al2O3) with trace sintering additives. The polycrystalline structure features tightly packed alpha-alumina crystals formed through high-temperature consolidation. Unlike traditional ceramics, these plates undergo precision sintering at 1600-1800°C to achieve densities exceeding 3.9 g/cm³, minimizing microscopic voids that compromise performance.

2.2 Functional Properties

Alumina ceramic blocks provide electrical insulation (10¹⁴-10¹⁵ Ω·cm) and chemical inertness, resisting acids and molten metals. Their low thermal expansion coefficient (8.1×10^-6/K) ensures dimensional stability during rapid temperature cycles. These properties make them indispensable for semiconductor manufacturing and metallurgical processes where contamination control is critical.

How Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block Was Produced

3.1 Powder Processing and Forming

Production begins with micron-sized Al2O3 powder (<1μm) blended with binders. Advanced forming techniques include:

• Dry pressing: Uniaxial compression creates simple shapes with 45-55% green density
• Isostatic pressing: Uniform hydraulic pressure forms complex geometries
• Injection molding: For precision components with tight tolerances

3.2 Sintering and Finishing

Sintering occurs in high-temperature kilns with controlled atmosphere profiles. The process involves:

1. Binder burnout at 400-600°C
2. Intermediate heating at 1100°C for dehydroxylation
3. Final sintering at 1600-1800°C for 2-8 hours
Post-sintering, components undergo diamond grinding to achieve ±0.1% dimensional accuracy and surface finishes down to Ra 0.2μm for precision applications.

What Are The Application Fields of Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block

4.1 High-Temperature Industrial Processing

These ceramics serve as furnace linings, sintering setters, and kiln furniture in:

• Metal heat treatment (up to 1600°C)
• Ceramic powder production
• Glass manufacturing
Their thermal stability prevents contamination while withstanding repeated thermal cycling, significantly outperforming refractory metals.

4.2 Specialized Engineering Applications

In semiconductor manufacturing, alumina blocks function as insulation plates in CVD reactors and wafer handling systems. The electrical insulation properties prevent current leakage in high-voltage equipment. Additional uses include:

• Plasma etching components
• Laser cutting nozzles
• Thermocouple protection tubes
• Wear-resistant parts in mining operations

How To Choose A Good Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block

5.1 Material Specifications

Select alumina content based on application requirements:

• 95% Al2O3: Cost-effective for general furnace use
• 99.6% Al2O3: Superior corrosion resistance
• 99.8% Al2O3: Maximum thermal stability (>1700°C)
Verify density (>3.8 g/cm³) and porosity (<0.5%) through material certificates. Higher density directly correlates with improved mechanical strength and thermal conductivity.

5.2 Manufacturing Quality Indicators

Inspect for:

1. Surface finish quality (absence of microcracks)
2. Dimensional tolerances (typically ±0.5% or better)
3. Edge integrity (chamfered edges prevent chipping)
4. Batch consistency (verified through ISO 9001 certification)
For specialized applications, request customized wear-resistant formulations with enhanced surface treatments.

What Does People Also Ask About Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block

6.1 Thermal Performance Queries

Q: What maximum temperature can alumina blocks withstand?

A: Standard grades withstand 1650°C continuously, while high-purity formulations (99.8% Al2O3) endure up to 1750°C in oxidizing atmospheres. Thermal shock resistance varies by thickness, with thinner sections surviving ΔT >800°C quenching cycles.

6.2 Maintenance and Lifespan Concerns

Q: How long do alumina sintering plates typically last?

A: Service life ranges from 6 months in abrasive environments to 5+ years in controlled thermal applications. Lifespan extends significantly when avoiding direct impact, thermal overshoot beyond rated temperatures, and contact with strong alkalis. Proper handling prevents edge chipping – the most common failure mode.

Tags: alumina ceramic block, Al2O3 sintering plate, high temperature ceramic plate, alumina furnace parts, 95% alumina ceramic, 99% alumina plate, ceramic insulation block, alumina setters

(Heat Resistance Alumina Ceramic Sintering Plate Al2O3 Ceramic Block)

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Alumina Technology Co., Ltd focus on the research and development, production and sales of aluminum oxide powder, aluminum oxide products, aluminum oxide crucible, etc., serving the electronics, ceramics, chemical and other industries. Since its establishment in 2005, the company has been committed to providing customers with the best products and services. If you are looking for high quality Alumina Ceramic Products , please feel free to contact us.（nanotrun@yahoo.com）