Product Introduction
This series of calcination annealing furnaces is widely used for annealing sapphire crystal rods and wafers, sintering special ceramics, and other ultra-high temperature industries. It is an *ideal choice for major research institutions, universities, and quality inspection units.
The electric annealing furnace adopts a split design for furnace control, using U-shaped molybdenum disilicide rods as heating elements. Annealing furnaces features PID intelligent program temperature control with overheat and thermocouple break protection, enabling fully automatic operation. The heating elements are distributed around the furnace chamber, ensuring uniform thermal distribution, minimal temperature difference, and low surface temperature of the furnace shell. The furnace chamber is made of new types of special refractory fiber products, allowing the chamber temperature to reach up to 1800°C.
It is pollution-free, non-volatile, energy-saving, environmentally friendly, safe, stable, and offers a long service life.
Working Principle
The 1800°C vacuum atmosphere furnace adopts a double-layer structure design using cold-rolled steel plates. The exterior is coated with a high-temperature baked finish for durability and aesthetics. The furnace chamber is constructed using imported high-purity alumina polycrystalline fiber material, offering excellent high-temperature resistance. High-performance molybdenum disilicide rods serve as heating elements to ensure efficient heating. A wind cooling system is installed between the double-layer furnace shell to quickly cool the temperature control system. The outer shell is fully sealed, with the cover plate sealed using silicone paste and the furnace door sealed with silicone gaskets, complemented by a water cooling system. Gases pass through flow meters and are introduced into the chamber via needle valves. The valve control system includes intake, exhaust, and vacuum valves, allowing gases such as hydrogen, argon, nitrogen, oxygen, carbon monoxide, and ammonia decomposition gas to be used. The furnace features uniform temperature distribution, low surface temperature, fast heating and cooling rates, and energy efficiency.
Product Features
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Unidirectional Loading/Unloading Calcination Annealing Furnace:
Features automatic lifting and forward-moving loading/unloading capabilities.
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Bidirectional Loading/Unloading Calcination Annealing Furnace:
Equipped with automatic lifting and two sets of forward and backward loading/unloading mechanisms, ensuring uninterrupted use for sintering, loading, cooling, and unloading.
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Furnace Shell:
Designed with a double-layer structure, ensuring low surface temperature and safety.
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Furnace Chamber Material:
The insulation material is a new type of special refractory fiber product, which is non-polluting, non-volatile, and achieves energy savings of over 40%.
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Heating System:
The heating elements are arranged around the furnace chamber, ensuring uniform temperature distribution and excellent insulation performance.
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Furnace Door Operation:
The furnace door is located at the bottom and controlled by a motor, allowing for automatic lifting and movement, ensuring ease of operation.
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Temperature Control System:
① Equipped with an intelligent 100-segment programmable control system, with independent voltage output limitation for each segment to ensure precise control.
② An LCD power display meter is included to centrally display operating voltage, current, power, and energy consumption. It also features an overcurrent alarm function for effective protection of the heating elements.
Specifications
| Parameter/Feature | Description |
| Maximum Temperature | Up to 1800°C |
| Temperature Uniformity | High uniformity of ±5°C |
| Temperature Controller | Multisegment microprocessor-based programmable temperature controller |
| Heating Elements | Silicon carbide elements (up to 1400°C), Molybdenum disilicide elements (1400°C to 1800°C) |
| Burner Safety System | Individual burner flame safety monitoring |
| Gas Ports | Equipped with gas inlet/outlet provisions |
| Gas/Vacuum Purging System | Supports gas/vacuum purging (compatible with Ar, N₂, O₂, H₂, CO₂, etc.) |
| Over-temperature Protection | Integrated over-temperature protection system |
| Smart Control System | Programmable PID controller with RS-232/RS485/Ethernet interfaces and data logging software |
Application
Crystal Annealing: Precision annealing of crystal materials to improve their internal structure and properties.
Annealing Furnaces is widely used in research institutions, universities, and industrial sectors, particularly for experiments and production requiring high temperatures, precise temperature control, and specific atmospheric environments.
Q&A
Q: What types of gases can be used with this equipment?
A: The equipment supports various gases, including hydrogen, argon, nitrogen, oxygen, carbon monoxide, and ammonia decomposition gas. It is suitable for reducing atmospheres, inert atmospheres, and hydrogen-nitrogen mixed atmospheres.
Q: What is the maximum operating temperature of the equipment?
A: The maximum operating temperature of the equipment is up to 1800°C.
Q: Does the equipment include a burner safety system?
A: Yes, the equipment is equipped with an individual burner flame safety monitoring system.
Q: What is the main purpose of annealing?
A: The main purposes of annealing include:Eliminate internal stresses;Improve workability;Adjust microstructure: Promote recrystallization or grain refinement to optimize mechanical properties (e.g., hardness, strength).
Q: What is the annealing process?
A: The annealing process generally involves three stages:Heating phase;Soaking phase;Cooling phase.
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Annealing Furnaces 1800℃ Crystal Annealing Supports Various Gases Images
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