Silicon Nitride Ceramic Umbrella Disc - High-Temperature Functional Component

Product Specification

Silicon Nitride Ceramic Umbrella Disc - High-Temperature Functional Component with Concentric Texture

Product Overview

This product is a silicon nitride ceramic umbrella disc manufactured using gel casting molding technology, featuring a unique dark gray metallic luster with precision-machined concentric radial textures on the surface. The product adopts a streamlined umbrella cover design with a precision circular through-hole at the center and smooth curved transitions at the edges. This special structure demonstrates excellent aesthetic quality while achieving outstanding functional performance, making it particularly suitable for high-end industrial equipment applications.

Primary Applications

• High-Temperature Equipment: Vacuum furnace heat insulation baffles, heat treatment equipment thermal reflection covers
• Optical Instruments: Laser equipment reflector bases, spectrometer scattering elements
• Fluid Engineering: Chemical process diffusers, combustion equipment flow distribution plates
• Semiconductor Manufacturing: CVD equipment carrier discs, plasma processing fixtures
• New Energy Sector: Fuel cell separation plates, electrolyzer insulation partitions

Product Advantages

→ Excellent Thermal Properties: Thermal conductivity 28 W/(m·K), thermal expansion coefficient 3.1×10⁻⁶/℃
→ Outstanding Mechanical Strength: Flexural strength ≥700 MPa, compressive strength ≥2500 MPa
→ Superior Surface Quality: Surface roughness Ra ≤0.05 μm, flatness ≤0.005 mm
→ High-Temperature Stability: Continuous service temperature 1400℃, short-term temperature resistance 1600℃
→ Good Electromagnetic Properties: Volume resistivity >10¹⁴ Ω·cm, dielectric constant 9.2@1MHz

Technical Specifications

Manufacturing Process

Nanopowder dispersion → Gel casting molding → Vacuum freeze drying → Atmosphere protection sintering → Plane precision grinding → Concentric texture machining → Through-hole precision reaming → Surface polishing → Dimensional inspection → Clean packaging

Usage Guidelines

1. Use specialized fixtures during installation to avoid damaging surface textures

2. For high-temperature applications, recommend graded heating with rate ≤5℃/min

3. Maintain surface cleanliness for optical applications, avoid direct finger contact

4. Regularly inspect surface condition, recommend professional cleaning every 500 operating hours

5. Avoid direct contact with molten metals to prevent metal ion penetration

Service Commitment

• 24-month extended quality assurance
• Complimentary application technical consultation
• Support for custom non-standard sizes
• Provision of third-party performance test reports
• Establishment of dedicated customer technical files

Frequently Asked Questions

Q: What is the functional purpose of the concentric texture?
A: The concentric texture enhances structural rigidity, promotes uniform distribution in fluid applications, and improves diffuse reflection effects in optical applications

Q: What is the maximum operating temperature of the product?
A: Maximum temperature is 1400℃ in oxidizing atmospheres and up to 1600℃ in inert gases

Q: Does the surface texture affect optical performance?
A: The precision concentric texture is optimally designed to effectively control light scattering angles and enhance optical system performance

Q: Are special texture customizations supported?
A: Supports custom specific texture patterns according to customer requirements, minimum texture width 0.1 mm

Technical Innovation:
Utilizes advanced gel casting molding technology to achieve single-step forming of complex curved structures, ensuring material isotropy. The concentric texture employs ultrasonic vibration machining to guarantee texture precision and consistency. The material undergoes special heat treatment processes with grain size controlled within 0.3-0.8 μm range, maintaining high strength while providing excellent thermal shock resistance. The product undergoes strict non-destructive testing to ensure defect-free internal structure, achieving service life more than 6 times longer than traditional materials under extreme working conditions.