SPS Furnace Manufacturer

HaoYue Group — ISO 9001 Certified SPS Furnace Manufacturer

As a leading SPS furnace manufacturer, HaoYue Group designs and builds advanced spark plasma sintering systems for rapid densification of advanced materials. Our SPS furnaces use pulsed DC current and uniaxial pressure to achieve near-theoretical density in minutes — dramatically faster than conventional sintering. From laboratory research units to fully automated continuous production lines, HaoYue delivers SPS technology that meets the most demanding materials processing requirements.

What Is Spark Plasma Sintering (SPS)?

Spark plasma sintering (SPS), also known as field-assisted sintering technique (FAST) or pulsed electric current sintering (PECS), is a rapid sintering technology that uses pulsed DC current passing directly through a conductive die and powder compact. The combination of rapid heating (up to 600°C/min), uniaxial pressure, and plasma activation effects enables:

Ultra-fast densification — Complete sintering in 5–30 minutes instead of hours
Nanostructure retention — Minimal grain growth due to short processing time and lower temperatures
Near-net-shape capability — Minimal machining required after sintering
Densification of difficult materials — Nanoceramics, refractory metals, FGMs, and temperature-sensitive compounds

HaoYue SPS Furnace Product Series

SPS-L Series — Laboratory SPS Furnace

Temperature: Up to 2200°C
Press capacity: 10T – 50T
Heating rate: Up to 600°C/min
Sample size: ≤Φ50mm
Power supply: 10–30 kW pulsed DC
Applications: Materials research, process development, small-batch R&D, academic institutions
Key feature: Compact benchtop design with full process control and data logging

SPS-M Series — Semi-Continuous SPS Production System

Temperature: Up to 2200°C
Press capacity: 50T – 200T
Sample size: ≤Φ200mm
Heating rate: Up to 500°C/min
Features: Automated die filling, sintering, and ejection cycle
Applications: Medium-volume production of advanced ceramics, cermets, and composite materials
Key feature: Semi-automatic operation with recipe management for repeatable batch production

SPS-C Series — Continuous SPS Production Line

Temperature: Up to 2000°C
Press capacity: 100T – 500T
Features: Fully automated powder transport, die indexing, sintering, and product collection
Applications: High-volume industrial production of uniform sintered components
Key feature: Continuous operation with minimal operator intervention — Industry 4.0 ready

SPS-H Series — Hybrid Induction + SPS Furnace

Temperature: Up to 2200°C
Heating method: Combined induction heating and pulsed DC
Advantages: Faster heating for large-diameter samples, reduced thermal gradient
Applications: Large-scale components, functionally graded materials, high-temperature composites
Key feature: Hybrid heating enables uniform temperature distribution in larger dies

Technical Specifications Comparison

Parameter	SPS-L (Lab)	SPS-M (Semi)	SPS-C (Continuous)	SPS-H (Hybrid)
Max Temp	2200°C	2200°C	2000°C	2200°C
Press Capacity	10–50T	50–200T	100–500T	50–300T
Heating Rate	600°C/min	500°C/min	400°C/min	500°C/min
Sample Diameter	≤Φ50mm	≤Φ200mm	≤Φ300mm	≤Φ250mm
Power	10–30 kW	30–80 kW	80–200 kW	50–150 kW
Vacuum	6.7×10⁻³ Pa	6.7×10⁻³ Pa	6.7×10⁻² Pa	6.7×10⁻³ Pa
Pulse Pattern	Programmable	Programmable	Programmable	Customizable

Real-World Applications: SPS Furnace Case Studies

Case 1: Nanostructured Thermoelectric Materials — European Research Institute

A European institute focused on sustainable energy materials needed an SPS furnace manufacturer capable of producing nanostructured thermoelectric materials with controlled grain size at production scale. HaoYue supplied an SPS-L laboratory system followed by an SPS-M semi-continuous production unit. Results:

Bismuth telluride and skutterudite materials sintered to >99% density in under 10 minutes
Grain size maintained below 100 nm — enabling ZT values 40% higher than conventionally sintered materials
Scalable process — lab recipe transferred directly to the production system with minimal adjustment
Energy consumption reduced by 70% compared to hot pressing equivalents

Case 2: Cutting Tool Grade Production — Saudi Carbide Manufacturer

A Saudi manufacturer producing ultra-fine grain carbide cutting tools required an SPS furnace for binderless and near-binderless tungsten carbide grades. HaoYue delivered an SPS-M semi-continuous system with 150T press capacity:

Binderless WC achieved >98% density at 1800°C in 15 minutes
Grain size: 200–400 nm — significantly finer than conventional vacuum sintering
Hardness values exceeding 2200 HV
Production throughput: 500+ tool inserts per 8-hour shift

Case 3: Functionally Graded Materials Development — Asian University

An Asian university materials science department chose HaoYue as their SPS furnace manufacturer for functionally graded material (FGM) research. The SPS-L system enabled:

Multi-layer FGM fabrication with gradual composition transition from ceramic to metal
Precise temperature and pressure control for each layer in a single sintering cycle
Thermal shock resistance improved by 150% compared to monolithic ceramics
Published research in 8 peer-reviewed journals using the HaoYue SPS system

SPS Process: How It Works

Die Preparation: Powder is loaded into a conductive graphite die with plungers on both ends
Chamber Evacuation: The SPS chamber is evacuated to high vacuum or backfilled with inert gas
Pressure Application: Uniaxial pressure (typically 30–100 MPa) is applied through the plungers
Pulsed Current: Programmable pulsed DC current (on/off pulse pattern) passes through the die and powder compact — the die acts as a heating element while current also passes directly through conductive powders
Rapid Heating: Temperatures reach 1000°C – 2200°C in 2–5 minutes depending on material and die size
Sintering Hold: Temperature and pressure are maintained for the required dwell time (typically 3–15 minutes)
Controlled Cooling: Power is reduced while pressure is maintained during initial cooling to minimize distortion
Die Extraction: The sintered compact is removed from the die — typically near-net-shape with minimal post-processing

Materials Processed with SPS Technology

Material Category	Specific Materials	Typical Cycle Time
Advanced Ceramics	Al₂O₃, ZrO₂, SiC, B₄C, Si₃N₄, AlN	10–20 min
Refractory Metals	W, Mo, Ta, Nb, Re, their alloys	15–30 min
Nanostructured Materials	Nanoceramics, nanocomposites, nanopowders	5–15 min
Thermoelectrics	Bi₂Te₃, skutterudites, PbTe, half-Heusler	8–15 min
Cermets & Composites	WC-Co, TiC-Ni, Al₂O₃-SiC, B₄C-TiB₂	10–20 min
FGMs	Ceramic-metal, composition-graded layers	15–40 min

Factory Capabilities & Production Strength

Annual capacity: 500+ vacuum furnace systems including dedicated SPS production line
R&D team: 45+ engineers with specialized SPS process knowledge
Certifications: ISO 9001:2015, CE
SPS demo lab: On-site SPS test facility for customer sample processing and process development
Global installations: SPS systems supplied to 15+ countries

Why Choose HaoYue as Your SPS Furnace Manufacturer?

Complete SPS range: From lab-scale to fully automated continuous production lines
Process development support: Our engineers work with your materials to develop optimized sintering profiles
Custom die design: Complex die geometries for non-standard sample shapes
Advanced pulse control: Fully programmable pulse patterns (on/off timing, current amplitude) for material-specific optimization
Data-driven results: Full cycle data export for process validation and publication
After-sales support: 24/7 technical support, remote diagnostics, and on-site service

Customization Options

Die size & material: Graphite, silicon carbide, or refractory metal dies for different applications
Atmosphere: Vacuum, argon, nitrogen, or reducing atmosphere
Temperature measurement: Pyrometer, thermocouple, or both for accurate control across all temperature ranges
Automation level: Manual lab operation through fully automated production with robotic material handling
Data system: Basic cycle logging, advanced SPC reporting, or cloud-based monitoring

Frequently Asked Questions

What is the difference between SPS and conventional hot pressing?

SPS uses pulsed DC current passing directly through the die and powder compact, enabling heating rates of up to 600°C/min — 10–20 times faster than conventional hot pressing. This rapid heating, combined with electromagnetic field effects and plasma activation, allows densification at lower temperatures and in much shorter cycle times while preserving fine microstructures.

Can SPS handle non-conductive materials?

Yes. For non-conductive ceramic powders, the graphite die itself acts as the heating element through resistive heating, while radiant heat and thermal conduction transfer heat to the sample. The pulsed current and pressure still enable faster densification than conventional methods for ceramic materials.

What sample geometries are possible with SPS?

Standard SPS produces simple cylindrical and rectangular shapes. With custom die designs, more complex geometries including stepped cylinders, tubes, and near-net-shape components are possible. Post-sintering machining can achieve final tolerances.

Is SPS suitable for industrial mass production?

Yes. HaoYue's SPS-C continuous production lines are specifically designed for high-volume industrial manufacturing. These systems automate the complete cycle — die filling, sintering, cooling, and product ejection — with minimal operator intervention. Multiple dies cycle through the system for continuous output.

What maintenance does an SPS furnace require?

Regular maintenance includes electrode and contact inspection, power supply cooling system checks, vacuum pump oil changes, and graphite die replacement (consumable item). HaoYue provides a complete maintenance schedule and spare parts kit with every SPS system.

Does HaoYue offer SPS process development services?

Yes. Our SPS demo lab can process customer material samples to demonstrate feasibility and develop optimized sintering recipes. This service is available before purchase commitment and continues as ongoing support for production process optimization.

Contact HaoYue — Your Trusted SPS Furnace Manufacturer

Ready to explore how spark plasma sintering can transform your materials processing? Contact us for a consultation, sample processing, or equipment quotation.

HaoYue Group

Tel/WhatsApp: +86-180-6810-6501
Email: lyle@haoyue-group.com
Website: www.vacuum-sintering.com
Factory: No.1, Jufeng Industrial Park, Tongzhou District, Nantong, Jiangsu, China