Graphite Crucible/High Quality CNBM Graphite Crucibles

Graphite Crucible/High Quality CNBM Graphite Crucibles System 1

Graphite Crucible/High Quality CNBM Graphite Crucibles

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 0 m.t.

Supply Capability:: 100000 m.t./month

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Specifications

1. SIC graphite crucible
2. high pure and density
3. high strength crucible
4. ISO 9001
5. high heat condduction

Product Description

A crucible is a container used to hold metal for melting in a furnace and it is needed to withstand the extreme temperatures encountered in melting metals. The crucible material must have a much higher melting point than that of the metal being melted and it must have good strength even when white hot.

Graphite crucible can withstand the high temperature, and has good resistance to chemical erosions and thermal shock. Especially graphite crucible is ideal for the melting of aluminum, copper and etc.

Specification

Bulk Density	g/cc	1.70-1.88
Specific Resistance	μΩ.m	6.0-15.0
Compressive Strength	MPa	30-80
Bending Strength	MPa	20-45
Shore hardness		30-70
C.T.E.(100-600°C)	x10-6 /°C	2.5-5.5
Ash	%	0.01-0.2
Maximum Grain Size	mm	0.044-0

Usage

1. Graphite crucible cannot be exposed in moisture, and must be placed in indoor dry place or wooden shelf. Maintain ventilated. Moisture is strictly prohibited. Damped crucible is likely to crack.

2. Each crucible, especially damped ones, must be preheated and roasted in drying equipment or next to a ground furnace before use. The roasting temperature should start from a low temperature of 100°C below. Roast it to 150°C at a speed of not higher than 30°C per hour. Preserve the heat for about 8 hours and then dry it. The crucible dried next to a ground furnace should be placed at least for one shift, and often turned to change direction, till workers feel the internal wall of crucible is hot.

3. The melting time for the first time should be at least twice of the normal melting time, in order to avoid cracking inside the crucible due to heating up too fast, or even cracking immediately when the fire sets on.

4. Handle with care. Falling or shaking is strictly forbidden in order to present cracking. Crucible should be placed below the mouth of furnace to prevent the furnace lid abrading the upper edge of the crucible and thus affecting the capacity.

5. Pour out the remaining cold metals inside the crucible after use, and then add new materials. Carefully and gently add new materials into the crucible. Feed materials according to the capacity of crucible. It is not allowed to feed too many materials, in order to prevent crucible from swelling or bursting.

Picture

Graphite Crucible/High Quality CNBM Graphite Crucibles

Q: What is the role of carbon in respiration?: The role of carbon in respiration cannot be overstated, as it serves as a vital element in organic molecules like glucose. When respiration takes place, glucose undergoes a breakdown with the presence of oxygen, resulting in the production of ATP energy. The carbon atoms found in glucose are oxidized, thereby releasing electrons that eventually transfer to oxygen and form carbon dioxide (CO2) as a byproduct. This entire process, which is referred to as cellular respiration, is universal among all living organisms and is indispensable for generating the energy necessary for various cellular activities. The absence of carbon would render respiration impossible and prevent the generation of energy essential for growth, movement, and other vital life functions. Additionally, the carbon dioxide generated during respiration is released into the atmosphere and plays a critical role in the carbon cycle, which contributes to the regulation of Earth's climate and supports plant growth through photosynthesis.

Q: What are the long-term effects of increased carbon emissions on ecosystems?: Increased carbon emissions have significant long-term effects on ecosystems. One of the most notable impacts is climate change, as carbon dioxide is a greenhouse gas that traps heat in the atmosphere. This leads to rising temperatures, altered weather patterns, and increased frequency and intensity of extreme weather events such as hurricanes, droughts, and wildfires. These changes in climate have numerous negative consequences for ecosystems. For instance, rising temperatures directly affect the physiology and behavior of plants and animals. Many species have specific temperature requirements for reproduction, feeding, and survival, and even slight changes can disrupt their life cycles and lead to population declines or extinctions. Furthermore, increased carbon emissions contribute to ocean acidification, a process where the excess carbon dioxide in the atmosphere dissolves in seawater, forming carbonic acid. This acidification has devastating effects on marine ecosystems, particularly coral reefs and shell-forming organisms like oysters and clams. It weakens their calcium carbonate structures and inhibits their growth and reproduction, ultimately leading to their decline. In addition, carbon emissions influence the distribution and composition of plant communities. As carbon dioxide is a vital component for photosynthesis, elevated levels can enhance plant growth and productivity. However, this can also lead to changes in plant composition and the competitive balance between species, favoring certain fast-growing species over others. This can disrupt the delicate relationships between plants and their pollinators, herbivores, and other organisms, affecting the entire food web. Moreover, increased carbon emissions contribute to the loss of biodiversity. Many species are highly specialized and adapted to specific environmental conditions. As habitats change due to climate change, certain species may struggle to adapt or find suitable alternatives, leading to declines or local extinctions. This loss of biodiversity can have cascading effects throughout ecosystems, disrupting ecological processes and reducing the resilience and stability of entire ecosystems. Overall, increased carbon emissions have far-reaching and detrimental long-term effects on ecosystems. They cause climate change, ocean acidification, alter plant communities, and drive biodiversity loss. It is crucial to reduce carbon emissions and mitigate climate change to protect and preserve the health and functioning of ecosystems for future generations.

Q: What are the environmental impacts of burning fossil fuels?: The burning of fossil fuels has significant environmental consequences that contribute to both climate change and air pollution. When coal, oil, and natural gas are burned, they release greenhouse gases, primarily carbon dioxide (CO2), into the atmosphere. These gases trap heat, resulting in global warming and climate change. The increased concentration of CO2 in the atmosphere is the main cause of global warming, which leads to higher temperatures and changes in weather patterns. Consequently, natural disasters like hurricanes, droughts, and floods become more frequent and severe. The melting of polar ice caps and glaciers is also accelerated, causing rising sea levels that pose a threat to coastal communities and ecosystems. In addition to climate change, the burning of fossil fuels releases other harmful air pollutants, including nitrogen oxides (NOx) and sulfur dioxide (SO2). These pollutants contribute to the formation of smog and acid rain, which have detrimental effects on human health, agriculture, and ecosystems. Furthermore, the extraction and transportation of fossil fuels cause environmental degradation. Activities such as coal mining and oil drilling can result in deforestation, destruction of habitats, and pollution of soil and water. Oil spills from offshore drilling operations, like the Deepwater Horizon disaster in the Gulf of Mexico, have devastating consequences for marine life and ecosystems. Overall, the environmental impacts of burning fossil fuels are extensive and severe. It is crucial to transition to cleaner and renewable energy sources in order to mitigate climate change, reduce air pollution, and protect our planet for future generations.

Q: What are the impacts of carbon emissions on the stability of river ecosystems?: Carbon emissions have significant impacts on the stability of river ecosystems. Increased carbon dioxide levels in the atmosphere lead to global warming, which in turn affects river temperatures and alters the water cycle. These changes can disrupt the balance of river ecosystems, impacting the availability of oxygen, nutrient cycling, and the reproductive cycles of aquatic organisms. Additionally, carbon emissions contribute to ocean acidification, which can indirectly affect river ecosystems through changes in the food chain and the migration patterns of certain species. Overall, carbon emissions pose a threat to the stability and biodiversity of river ecosystems.

Q: What are the properties of carbon-based textiles?: Carbon-based textiles have a number of unique properties that make them advantageous in various applications. Firstly, carbon-based textiles exhibit exceptional strength and durability. They are known for their high tensile strength, making them resistant to stretching and tearing. This property allows carbon textiles to withstand harsh conditions and maintain their integrity over time. Secondly, carbon-based textiles possess excellent thermal conductivity. They can efficiently conduct heat, making them suitable for applications that require effective heat management. This property is particularly useful in industries such as aerospace, automotive, and electronics, where heat dissipation is essential to prevent system failures. Furthermore, carbon textiles are highly resistant to chemical corrosion. They can withstand exposure to various chemicals, acids, and solvents without losing their structural integrity. This property makes carbon-based textiles ideal for applications in the chemical industry, where exposure to corrosive substances is common. Another notable property of carbon textiles is their inherent flame resistance. They have a high resistance to ignition and do not propagate flames easily. This characteristic makes them suitable for use in environments where fire safety is crucial, such as in protective clothing for firefighters and military personnel. Carbon-based textiles also exhibit good electrical conductivity, making them suitable for applications in electronics and electrical engineering. They can effectively conduct electricity and dissipate static charges, reducing the risk of electrical malfunctions or damage. Lastly, carbon textiles have a low coefficient of thermal expansion, meaning they do not expand or contract significantly with changes in temperature. This property makes them dimensionally stable, ensuring that they maintain their shape and size under varying thermal conditions. In summary, carbon-based textiles possess a combination of strength, durability, thermal conductivity, chemical resistance, flame resistance, electrical conductivity, and dimensional stability. These properties make them highly versatile and suitable for a wide range of applications in various industries.

Q: How does carbon impact food production?: There are several ways in which carbon affects food production. To begin with, carbon dioxide (CO2) is a significant greenhouse gas that plays a role in climate change. The presence of higher levels of CO2 in the atmosphere leads to increased temperatures, changes in rainfall patterns, and more frequent extreme weather events. All of these factors can have a negative impact on crop growth and productivity. For instance, excessive heat can result in lower crop yields and reduced quality, while intense rainfall or droughts can cause flooding or water scarcity, both of which can harm crops and decrease agricultural productivity. Moreover, carbon emissions originating from agricultural practices, such as the utilization of synthetic fertilizers, deforestation for agriculture, and livestock production, contribute to the overall carbon footprint of the food system. These emissions worsen climate change, establishing a vicious cycle in which climate change has an adverse effect on food production, while food production, in turn, contributes to climate change. Furthermore, the production of food is also influenced by carbon emissions from its transportation and processing. The transportation of food over long distances, which often involves the use of fossil fuels, leads to carbon emissions. Similarly, the processing and packaging of food require energy, often derived from fossil fuels, which further adds to carbon emissions. To alleviate the carbon impact on food production, it is necessary to adopt sustainable agricultural practices. This includes techniques like agroforestry, organic farming, and precision agriculture, which can help store carbon in soils, reduce dependency on synthetic fertilizers, and enhance overall soil health. Additionally, reducing food waste and promoting the consumption of local and seasonal food can decrease carbon emissions associated with transportation and processing. In conclusion, carbon affects food production through its contribution to climate change and the resulting extreme weather events, as well as through emissions generated from agricultural practices and food processing. Addressing these impacts is crucial for ensuring food security and sustainability in the face of climate change.

Q: Does anyone know what the definition of carbon storage is in ecology? Thank you: If there is no clear definition of books on carbon storage in the understanding of ecology of the individual usually refers to the separation of gaseous carbon dioxide from the atmosphere, through the process of ecology carbon fixed, this process mainly refers to the plants convert carbon dioxide into carbohydrates.In addition, there is now another implication: carbon stripping technology will be used to collect carbon dioxide from human emissions into the air separation of the ground floor storage.

Q: What is the role of carbon in the human body?: Carbon plays a critical role in the human body as an essential element for all organic molecules, serving as the backbone for many biomolecules including carbohydrates, lipids, proteins, and nucleic acids, which are vital for various physiological processes. To begin with, carbohydrates, being the primary source of energy for the body, heavily depend on carbon. Glucose, a simple sugar consisting of carbon, hydrogen, and oxygen, undergoes cellular respiration within cells to release energy. Complex carbohydrates like glycogen, which are stored in the liver and muscles as an energy reserve, also rely on carbon for their structural composition. Moving on, lipids such as fats and oils contain carbon and serve multiple purposes including energy provision, insulation, and organ protection. Carbon atoms form long hydrocarbon chains in lipids, making them hydrophobic and enabling efficient energy storage and release. Lipids also play a crucial role in cell membrane structure and hormone production. Additionally, carbon is a fundamental component of proteins, which participate in almost all cellular processes. Proteins consist of amino acids, with carbon atoms forming the backbone of these amino acids, providing stability and flexibility to the protein structure. Carbon also contributes to the formation of peptide bonds, which connect amino acids to build proteins. Proteins are necessary for functions such as enzyme catalysis, molecule transport and storage, immune response, and cell signaling. Lastly, carbon is an indispensable element in nucleic acids such as DNA and RNA, which contain genetic information. Carbon atoms create the sugar-phosphate backbone of nucleic acids, ensuring structural stability. DNA carries hereditary information, while RNA plays a vital role in protein synthesis. In conclusion, carbon is crucial in the human body as it forms the foundation of organic molecules like carbohydrates, lipids, proteins, and nucleic acids. Its versatility and ability to form stable bonds allow for the diverse functions and structures necessary for life processes.

Q: How can carbon capture and storage help reduce greenhouse gas emissions?: Carbon capture and storage (CCS) is a technology that can play a significant role in reducing greenhouse gas emissions. It involves capturing carbon dioxide (CO2) produced from industrial processes or power generation, transporting it, and then storing it underground in geological formations. Firstly, CCS can help reduce greenhouse gas emissions by capturing CO2 directly from large point sources, such as power plants or industrial facilities, that would otherwise be released into the atmosphere. By capturing and storing this CO2, it prevents it from contributing to the greenhouse effect and mitigates its impact on climate change. Secondly, CCS can enable the continued use of fossil fuels, such as coal or natural gas, in a more environmentally friendly manner. These fuels are currently the primary sources of energy for electricity generation and industrial processes. By implementing CCS, the CO2 emissions from these fossil fuel-based activities can be drastically reduced, allowing for a transition towards cleaner energy sources in a more gradual and economically feasible manner. Furthermore, CCS can also be coupled with bioenergy production, creating what is known as bioenergy with carbon capture and storage (BECCS). This process involves using biomass, such as crop residues or purpose-grown energy crops, to produce energy. The CO2 emitted during the bioenergy production is then captured and stored, resulting in a negative emissions process. BECCS can effectively remove CO2 from the atmosphere, helping to offset emissions from other sectors and achieving net-negative emissions. Lastly, CCS can contribute to the decarbonization of hard-to-abate sectors, such as cement and steel production, where alternative low-carbon technologies are currently limited. By capturing and storing CO2 emissions from these sectors, CCS can significantly reduce their overall greenhouse gas emissions and facilitate their transition towards more sustainable practices. In conclusion, carbon capture and storage technology can help reduce greenhouse gas emissions by directly capturing and storing CO2 from large point sources, allowing for the continued use of fossil fuels in a more sustainable manner, enabling the deployment of negative emissions technologies like BECCS, and supporting the decarbonization of hard-to-abate sectors. Implementing CCS alongside other mitigation strategies can play a vital role in achieving global climate goals and combating climate change.

Q: There are several allotropes of carbon: Allotrope of carbon: diamond, graphite, carbon 60 (fullerene), amorphous carbon (charcoal, coke, activated carbon, etc.)

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