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PRODUCT CENTER


The main products are ultra-high temperature graphitization furnace, carbonization furnace, all kinds of ultra-high temperature sintering furnace, silicon oxide vacuum furnace, medium frequency induction sintering furnace, vacuum furnace, induction heating equipment, resistance heating equipment, etc

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ABOUT US

Zhuzhou Chi Carbon Automation Equipment Co., Ltd


Located in Zhuzhou City, one of the eight old industrial bases in China, Zhuzhou Chi Carbon Automation Equipment Co., Ltd. is a technology enterprise specializing in the research and development, production, sales and service of high temperature industrial furnaces and intelligent thermal equipment. Relying on a perfect supporting industrial system and a young, brave and pioneering team, we are committed to continuously and effectively creating value for customers. And fulfill corporate social responsibility.

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APPLICATION FIELD


Widely used in new materials high temperature treatment, batteries, graphite, thermal conductivity film, special ceramics, carbon carbon composite materials, cemented carbide, refractory metal and other dozens of processing and manufacturing industries and fields

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2026-06-05

The "Three Mountains" of Silicon Nitride Ceramic Sintering: Densification, Grain Boundary Control, and Cracking — How Does a Vacuum Hot Press Furnace Overcome Them?


Silicon nitride (Si₃N₄) ceramics offer exceptional strength, fracture toughness, and thermal shock resistance, but their sintering process faces three major challenges: difficult densification, uncontrolled grain boundary phases, and cracking caused by residual thermal stress. This article explains how a vacuum hot press furnace overcomes each of these obstacles: Densification – Applied mechanical pressure (30–100 MPa) significantly lowers sintering activation energy, enabling near-theoretical density (>99%) at 1700–1750°C. Grain boundary control – Vacuum environment and post-sinter annealing allow in-situ crystallization of the glassy phase, transforming it from a high-temperature weakness into a stable, heat-resistant structure. Cracking prevention – Programmed stepwise pressure release and controlled slow cooling rates minimize thermal gradients, eliminating residual stress‑induced fractures.
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CORPORATE ADVANTAGE


National service hotline: +86 0731-22866218 Welcome to negotiate!

碳中和节能减排

Customized R&D · Tailor-Made Thermal Solutions


Based on project-based cooperation, we conduct customized R&D with a complete product portfolio, rich material expertise and extensive on-site experience, delivering high-quality thermal solutions tailored to your needs.

Efficiency-First · Professional & Ingenious Manufacturing


Our dynamic professional team adheres to the principle that efficiency is productivity. We put your needs first, enforce strict quality control over every detail, and focus on R&D and production of high-efficiency, energy-saving and intelligent premium thermal equipment, winning the market with superior quality.

资产保护
人居环境优化

Worry-Free Service · Comprehensive After-Sales Support


We have established a sound after-sales service network with our staff on 24/7 standby. Upon receiving equipment fault notifications, we guarantee 10-minute phone response, 30-minute solution formulation and 24-hour on-site service.

We maintain dedicated user files with a person-in-charge system and conduct annual nationwide after-sales visits. All components are fully traceable, ensuring on-demand availability and total peace of mind for you.

 

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