China High-Temperature Resistant Silicon Nitride Ceramic Blocks for Dewatering Elements with High Strength & Hardness and Wear Resistance & Self-Lubrication for sale

High-Temperature Resistant Silicon Nitride Ceramic Blocks for Dewatering Elements with High Strength & Hardness and Wear Resistance & Self-Lubrication

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Product Description

Silicon Nitride Ceramic Blocks for Papermaking Dewatering Elements

Product Overview

Silicon Nitride Ceramic Blocks are engineered specifically for dewatering elements in high-speed paper machines, optimized for advanced papermaking equipment operating at speeds exceeding 800 m/min. These blocks leverage exceptional high-temperature resistance, superior hardness, self-lubricating properties, and excellent thermal shock resistance to significantly enhance the service life and operational stability of dewatering elements, enabling efficient and continuous production in papermaking operations.

Key Features

Feature	Description
High-Temperature Resistance	Maintains stable performance up to 1400°C without reacting with most substances, suitable for high-temperature conditions.
High Strength & Hardness	Flexural strength ≥980MPa, capable of withstanding large mechanical loads and impacts, ensuring structural integrity.
Wear Resistance & Self-Lubrication	Effectively resists particle and sliding wear, reduces friction loss, and extends service life.
Excellent Thermal Shock Resistance	Adapts to drastic temperature fluctuations without cracking or deformation, maintaining material integrity.
Low Thermal Conductivity	Prevents material deformation or performance degradation caused by rapid heat transfer, enhancing operational stability.

Typical Applications

Dewatering elements for high-speed paper machines
Wear-resistant components in papermaking production lines
Structural parts in high-temperature and high-humidity environments

Performance Specifications

Test Item	Value Range	Unit
Density	3.20 - 3.26	g/cm³
Apparent Porosity	0 - 0.1	%
Elastic Modulus	300 - 320	GPa
Compressive Strength	＞1500	MPa
Vickers Hardness (HVO.5)	15 - 16	GPa
Fracture Toughness	＞8.0	-
Flexural Strength	＞700	MPa
Poisson's Ratio	0.25	-
Coefficient of Thermal Expansion	3.1 - 3.3	×10⁻⁶ /℃
Weibull Modulus	11 - 13	-
Thermal Conductivity	20 - 25	W/(m*k)
Specific Resistivity	10¹¹	Ω*cm

Key Highlights

Extremely Dense Structure: Apparent porosity approaches 0%, providing a dense structure with excellent penetration resistance.
Ultra-High Strength: Compressive strength exceeds 1500MPa, flexural strength exceeds 700MPa.
Excellent Thermal Stability: Low coefficient of thermal expansion, adaptable to drastic temperature changes.
Good Insulation Performance: Specific resistivity reaches 10¹¹ Ω*cm, meeting electrical insulation requirements.