Graphite Vs Ceramic Crucible - SIC Graphite Crucibles for Melting Aluminium, Copper, Brass 2024

Graphite Vs Ceramic Crucible - SIC Graphite Crucibles for Melting Aluminium, Copper, Brass 2024 System 1

Graphite Vs Ceramic Crucible - SIC Graphite Crucibles for Melting Aluminium, Copper, Brass 2024 System 2

Graphite Vs Ceramic Crucible - SIC Graphite Crucibles for Melting Aluminium, Copper, Brass 2024 System 3

Graphite Vs Ceramic Crucible - SIC Graphite Crucibles for Melting Aluminium, Copper, Brass 2024

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 1 pc

Supply Capability:: 1000 pc/month

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Quick Details for SiC Graphite Crucibles For Gold, Melting Aluminium And Copper, Brass

Type:	High Strength, graphite crucible crucible	Application:	melting metal	Height:	as your requirements
Composition:	High Pure	Top Diameter:	10-600mm	Bottom Diameter:	10-1000mm
Place of Origin:	China (Mainland)	Brand Name:		Model Number:
Color:	Black grey	Si3N4%:	5min	Fe2O3%:	0.7max
C%:	30-45	Apparent porosity:	30max	Refractoriness:	1680
Bulk Density:	1.71min	Using life:	>5000 hours	MAX temperature:	1600c

Packaging & Delivery

Packaging Details:	Seaworty packing or as per customer's detail requirement of graphite crucible.
Delivery Detail:	within 20-30 days after confirm order of graphite cru

SiC Graphite Crucibles For Melting Aluminium And Copper, Brass

Product Description

Specifications for Graphite Silicon Carbide Crucible For Aluminum Melting :

1.Long working lifetime: its working lifetime is increased 3-5 times over normal clay-crucible due to the compact body formed under high pressure.

2.High thermal conductivity: high-density body and low apparent porosity greatly improve its heat conductivity.

3.New-style materials: new heat conduction material ensures faster heat conductivity and pollution-free product, reduces adherent slag.

4.Resistance to corrosion:better anti-corrosion than normal clay-crucible.

5.Resistance to oxidation: advanced process dramatically improves its oxidation resistance, which ensures persistent heat conductivity and long working lifetime.

6.High-strength: high-density body and logical structure make the product better compression property.

7.Eco-friendly: energy-efficient and pollution-free, not only ensure metal product purity, but also ensure sustainable development on environment.

8.Multi-function: Can be used in induction graphite crucible furnace

SiC Graphite Crucibles For Melting Aluminium And Copper, Brass 2015

Physicochemical Properties of graphite crucible:

The crucible is an utensil or melting tank vessels that is made of refractory material (such as clay, graphite, quartz or difficult molten metal iron, etc.).

Graphite crucible, with is special advantages and Plasticity, is widely used in the smelting area, e.g. gold smelting, silver smelting, aluminum smelting, cooper smelting, etc.

		high pure graphite
Item	Unit	baked twice	baked three time	baked four times
Item	Unit	impregnated once	impregnated twice	impregnated three times
grain size	mm	≤325μm	≤325μm	≤325μm
Bulk density	g/cm3	≥1.68	≥1.78	≥1.85
Specific resistance	μΩ.m	≤14	≤14	≤13
Bending strength	MPa	≥25	≥40	≥45
Compressive strength	MPa	≥50	≥60	≥65
Ash content	%	≤0.15	≤0.1	≤0.05

		Fine-grain Specialty Graphite FXG-1		Fine-grain Specialty Graphite FXG-2
Item	Unit	Guarantee value	Typical value	Guarantee value	Typical value
Item	Unit	Guarantee value	Typical value	Guarantee value	Typical value
Max grain size	mm	0.8	0.8	0.8	0.8
Bulk density	g/cm3	≥1.70	1.73	≥1.73	1.76
Specific resistance	μΩ.m	≤8.5	7.5	≤8.0	7
Bending strength	MPa	≥10.0	11	≥12.0	12.5
Compressive strength	MPa	≥24.0	27	≥31.0	34
Thermal Condcutivity	W/(m.k)	≥120	150	≥130	160
C.T.E.(100-600) °C	10-6/°C	≤2.5	2.2	≤2.5	2.1
Ash content	%	≤0.3	0.09	≤0.3	0.09

NO	Top diameter	Bottom diameter	Height	Tolerance	Capacity(Kg5%)
2	90	50	55	2	0.3
3	105	80	93	2	0.5
4	102	80	100	2	0.6
5	112	82	130	2	0.8
6	120	82	141	2	0.9
8	138	90	153	2	1.2
12	148	100	181	2	1.8
16	156	110	190	2	2.3
20	180	120	230	2	3
25	186	128	248	2	3.7

Q:Is it possible to achieve controlled pouring with a graphite crucible?: Controlled pouring using a graphite crucible is indeed achievable. Various industries, such as metal casting and melting, widely utilize graphite crucibles due to their unique properties. These crucibles possess a high melting point, excellent thermal conductivity, and good resistance to thermal shock, making them suitable for handling high-temperature substances. To achieve controlled pouring with a graphite crucible, several factors must be taken into account. Firstly, it is essential to adequately preheat the crucible to the desired pouring temperature. This ensures that the molten material maintains its desired temperature throughout the pouring process, preventing premature solidification. Secondly, the design of the crucible and its pouring lip should enable precise control over the flow of the molten substance. Shaping the pouring lip allows for a steady and controlled stream, reducing the risk of splashing or spilling. Moreover, the operator's expertise and experience play a vital role in achieving controlled pouring. They must possess a comprehensive understanding of the poured material, its characteristics, and the appropriate pouring techniques. Additionally, they should be mindful of potential hazards and take necessary precautions to ensure safety throughout the pouring procedure. In conclusion, achieving controlled pouring with a graphite crucible is feasible by considering proper preheating, suitable crucible design, and skilled operators. These factors contribute to achieving precise and controlled pouring for a variety of applications.

Q:Can a graphite crucible be used for iron melting?: No, a graphite crucible cannot be used for iron melting. Iron has a higher melting point than graphite, and therefore requires a crucible made of a material with a higher melting point, such as clay graphite or silicon carbide. Using a graphite crucible for iron melting would cause the crucible to melt or degrade, leading to contamination of the molten iron and potential damage to the furnace or equipment. It is crucial to choose the appropriate crucible material based on the melting point of the metal being melted to ensure proper and safe melting operations.

Q:Can graphite crucibles be used for both melting and casting?: Yes, graphite crucibles can be used for both melting and casting. Graphite is known for its excellent heat resistance and high melting point, which makes it an ideal material for containing molten metals during the melting process. Additionally, graphite crucibles have good thermal conductivity, allowing for efficient heat transfer and uniform heating of the molten metal. Once the metal is melted, the graphite crucible can also be used for casting. The molten metal can be poured directly from the crucible into a mold, allowing for the creation of various shapes and forms. Graphite crucibles are typically durable and can withstand repeated heating and cooling cycles, making them suitable for both melting and casting processes. However, it is important to note that graphite crucibles may not be suitable for all types of metals. Some reactive or corrosive metals may react with graphite at high temperatures, leading to contamination of the molten metal. In such cases, alternative crucible materials like ceramic or refractory metals may be more appropriate.

Q:What are the different methods of preventing graphite crucible breakage?: To prevent the breakage of graphite crucibles, there are various methods that can be utilized: 1. Ensuring proper handling and storage is crucial. Careful handling and avoiding sudden or rough movements that could cause impact or stress on the crucible are effective ways to prevent breakage. Additionally, storing the crucibles in a secure location, away from potential hazards or sources of damage, is important. 2. Following controlled heating and cooling procedures is essential. Graphite crucibles are exposed to high temperatures during the melting process, so it is necessary to heat and cool them gradually and in a controlled manner. This approach helps minimize thermal shock and stress on the crucible, thereby reducing the risk of breakage. 3. Preheating the graphite crucible before use can also prevent breakage. This involves gradually heating the crucible to a specific temperature range before adding the molten material. Preheating minimizes the temperature difference between the crucible and the molten material, thus reducing the risk of thermal shock and potential breakage. 4. Applying protective coatings to the graphite crucible provides an additional layer of protection against breakage. Coatings like boron nitride or alumina improve thermal shock resistance and decrease the likelihood of crucible failure. 5. Regularly inspecting and maintaining the graphite crucible is crucial. Regular inspections for any signs of damage or wear, such as cracks, chips, or defects, are necessary to prevent breakage. Addressing these issues immediately can prevent further deterioration. Additionally, routine maintenance, including cleaning and removing build-up or impurities, can prolong the crucible's lifespan and prevent breakage. By implementing these methods, individuals or industries can significantly reduce the risk of graphite crucible breakage, ensuring their longevity and optimal performance in various high-temperature applications.

Q:Can graphite crucibles be used for eutectic growth?: Yes, graphite crucibles can be used for eutectic growth. Graphite has excellent thermal conductivity and can withstand high temperatures, making it suitable for many high-temperature applications, including the growth of eutectic alloys.

Q:Can graphite crucibles be used for heat treatment processes?: Yes, graphite crucibles can be used for heat treatment processes. Graphite is known for its high melting point and excellent thermal conductivity, which makes it an ideal material for applications requiring high temperatures and efficient heat transfer. Heat treatment processes involve heating materials to specific temperatures to alter their physical or chemical properties. Graphite crucibles can withstand these high temperatures without melting or deforming, ensuring the stability and integrity of the heat treatment process. Additionally, graphite's low reactivity with most substances makes it suitable for a wide range of heat treatment applications, including annealing, tempering, quenching, and carburizing. Overall, graphite crucibles are a popular choice for heat treatment processes due to their high temperature resistance, thermal conductivity, and chemical inertness.

Q:How do you determine the appropriate crucible lid seal for a specific application?: To determine the appropriate crucible lid seal for a specific application, there are a few factors to consider. Firstly, you need to understand the compatibility of the seal material with the crucible and its contents. Different materials have varying resistance to temperature, chemicals, and pressure, so choose a seal that can withstand the specific conditions of your application. Secondly, assess the sealing mechanism required. Depending on the application, you may need a seal that provides airtight or vacuum-tight closure, or one that allows for controlled gas flow. Consider the type of lid and crucible design as well, as certain seals may be better suited for specific configurations. Lastly, take into account the lifespan and maintenance requirements of the seal. Some applications may require frequent lid removal and seal replacement, while others may need a more durable and long-lasting solution. Overall, it is crucial to carefully evaluate the compatibility, sealing mechanism, and maintenance considerations to determine the appropriate crucible lid seal for a specific application.

Q:Can graphite crucibles be used for semiconductor doping?: Semiconductor doping requires the use of graphite crucibles. The semiconductor industry frequently relies on graphite crucibles because of their unique characteristics. These crucibles possess high thermal conductivity, chemical inertness, and the ability to endure high temperatures, which makes them ideal for various semiconductor manufacturing processes, including doping. Throughout the doping procedure, the crucibles serve as containers for both the dopant material and the semiconductor wafer. Their purpose is to create a stable and controlled environment for the diffusion of dopant atoms into the semiconductor material. Moreover, graphite crucibles offer excellent thermal stability, which is crucial during the doping process since it involves subjecting the wafer to elevated temperatures. The crucibles help maintain a consistent temperature, ensuring uniform doping across the semiconductor wafer. Additionally, graphite crucibles exhibit chemical inertness, meaning they do not react with either the dopant material or the semiconductor material. This is essential in preventing any contamination or undesired reactions that may affect the doping process or the quality of the semiconductor material. In summary, graphite crucibles are extensively used in semiconductor doping due to their high thermal conductivity, chemical inertness, and ability to withstand high temperatures. They create a stable and controlled environment for the doping process, guaranteeing uniform doping across the semiconductor wafer.

Q:How does the surface tension of graphite affect crucible performance?: Crucible performance can be significantly impacted by the surface tension of graphite. Graphite is renowned for its high surface tension, which refers to its ability to minimize surface area by forming droplets or a curved surface. This characteristic is vital in crucible performance as it affects the wettability, thermal conductivity, and erosion resistance of the graphite material. To begin with, the wettability of graphite with molten metals or other processed materials in the crucible is influenced by its surface tension. The high surface tension allows the graphite crucible to repel or resist wetting by the molten material, preventing it from sticking to the crucible walls. This is especially important in processes such as metal melting or pouring, where the crucible needs to facilitate easy release of the molten material without any adhesion or contamination. Additionally, thermal conductivity within the crucible is influenced by surface tension. Graphite possesses excellent thermal conductivity, and its high surface tension ensures efficient distribution of heat throughout the crucible. This uniform heat distribution aids in maintaining a consistent temperature profile, reducing thermal gradients, and ensuring more effective and controlled material processing. Lastly, the erosion resistance of graphite is affected by its surface tension, which is vital for the longevity of the crucible. The high surface tension of graphite enables it to resist erosion caused by molten materials or any mechanical forces acting upon it. This property helps in preventing wear and tear, maintaining the structural integrity of the crucible, and prolonging its lifespan. In conclusion, the surface tension of graphite has a significant impact on crucible performance. It affects the wettability, thermal conductivity, and erosion resistance of the graphite material, ensuring efficient material release, uniform heat distribution, and long-lasting durability of the crucible.

Q:How do you determine the appropriate crucible pouring lip for a specific application?: The appropriate crucible pouring lip for a specific application is usually determined by considering factors such as the desired pouring speed, the material being poured, the temperature, and the required precision. It is important to choose a lip design that allows for controlled and accurate pouring without spilling or splashing, while also considering the ease of handling and the size of the crucible.

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