Polycrystalline Silicon

Your Professional Polycrystalline Silicon Supplier

Anyang Jiashike Metal Co.,LTD,as the leading manufacturer of ferroalloy materials in China.It is a comprehensive enterprise integrating scientific research, processing and production, and import and export trade.
It has more than 20 years of experience in the professional field and uses advanced technology and professional equipment. , produces high-quality metals and alloys, and its business scope involves metallic silicon, ferrosilicon, silicon-calcium alloy, silicon-carbon alloy, natural graphite powder and other products.

Why Choose Us

Experienced

Have a good reputation with more than 20 years experience in ferroalloy.

Competitive Price

As a primary raw material supplier of ferroalloy, we can offer you more competitive prices.

Professional Team

There are two team to meet your requirement,our technology team working on innovate and improve products and our sales team working on provide the personalized situation and after-sale service.

Production equipment

Our company adopts advanced equipment and technology in production and has advanced production lines and equipment to efficiently produce high-quality ferroalloy products. We focus on product quality management and ensure that our products comply with international standards and customer requirements through strict quality control and testing processes.

Specification

Property	Bulk Crystalline Silicon	Polycrystalline Si
Thin Film Density	2.329 g/cm³	2.3 g/cm³
Thermal Coefficient of Expansion	2.6 µm/(m·K) (at 25°C)	2 µm/(m·K) (at 25°C)
Temperature Coefficient of Resistance	-70 x 10^-3 /°C	1 x 10^-3 /°C
Intrinsic Stress	N/A	Compressive: 1-5 x 10⁹ dynes/cm³

Polycrystalline Silicon Properties (Theoretical)

Molecular Weight	28.08
Appearance	Silvery
Melting Point	1414 °C
Boiling Point	2900 °C
Density	2330 kg/m3
Solubility in H2O	N/A
Poisson's Ratio	0.064 - 0.28
Young's Modulus	51-80 GPa
Vickers Hardness	N/A
Tensile Strength	N/A
Thermal Conductivity	1.49 W/cm/K @ 298.2 K
Thermal Expansion	(25 °C) 2.6 µm·m-1·K-1
Electrical Resistivity	3-4 microhm-cm @ 0 °C
Electronegativity	1.8 Paulings
Specific Heat	0.168 Cal/g/K @ 25 °C
Heat of Fusion	9.47 Cal/gm mole
Heat of Vaporization	40.6 K-Cal/gm atom at 2355 °C

Advantages of Polycrystalline Silicon

01/

Durable and reliable
Polycrystalline silicon—bringing excellent qualities and reliability so it can keep achieving stable performance, even in the harshest of environments. Be it high or chilled temperatures, polycrystalline silicon very well adapts to such conditions. Such a property is very useful in the case of long-running equipment like solar cells and industrial sensors.

02/

Cost-effective production
It's all about polycrystalline silicon being a high-tech material that is not quite expensive to produce owing to the huge amounts of its raw materials and wide-ranging production processes. While silica sand forms the bulk of the raw materials for polycrystalline silicon, it is in plenty among the world's materials, thus ensuring a steady supply for the long term.

03/

Enhances efficiency
The efficiency of numerous devices and technologies is enhanced substantially by polycrystalline silicon. In the solar industry, for instance, high-quality polycrystalline silicon materials can significantly increase the photoelectric conversion rate of solar cells, enabling solar panels to produce more electricity of similar size compared to others. This high-efficiency characteristic greatly increases the economic and practical viability of solar power generation.

04/

Environmentally friendly
Polycrystalline silicon is much more than a green material. It has various degrees of compatibility with the environment in which it is applied. The first raw material, silica sand, is an almost entirely renewable resource and has a very low impact on the natural environment when extracted. Comparatively, therefore, production from polycrystalline silicon turns out to be relatively sustainable and reduces reliance on scarcity.

Applications areas of polycrystalline silicon

Solar panel manufacturing: Polysilicon is one of the key materials for solar panel manufacturing. By melting silicon ore, forming silicon rods and cutting them into thin sheets, solar panels can be prepared to convert sunlight into electricity for use in solar power systems.

Semiconductor chip manufacturing: Polysilicon is one of the main materials used in the manufacture of integrated circuit chips. By using polysilicon in the silicon wafer manufacturing process, a variety of materials can be deposited on the surface to form circuit elements such as transistors, capacitors and resistors. These chips are the core components of modern electronic products and are widely used in devices such as computers, cell phones, tablets, and televisions.

Photovoltaic materials: Polysilicon can be used to make other types of photovoltaic materials, such as solar absorbing layers and transparent conductive layers. These materials absorb sunlight and generate electricity, which is used in solar panels and other photovoltaic devices.

Medical: Polysilicon also has important applications in the medical field, where it can be used to manufacture medical devices and equipment such as artificial joints, artificial heart valves and implantable medical sensors. Polysilicon has excellent biocompatibility and mechanical properties, making it one of the ideal materials for medical device manufacturing.

Environmental engineering: Polysilicon can be used to manufacture gas sensors for detecting and monitoring air quality, water quality and environmental pollutants. Its high sensitivity and fast response time make it one of the ideal materials for environmental monitoring.

Optics and fiber optic communications: Polysilicon has the characteristics of low attenuation and high optical transparency, so it is commonly used in the manufacture of optical lenses, fiber optic cables and fiber optic connectors and other optical and fiber optic communications equipment.

Types of Polycrystalline Silicon

Classification by form

- Massive silica: The morphology is similar to rock, the size ranges from a few centimeters to tens of centimeters, the quality is relatively stable, and it is easy to store for a long time. According to the smoothness of the surface, massive silicon can be divided into three types: Dense material, cauliflower material and coral material. Dense material is smooth in appearance, the surface particles of the degree of depression is usually less than 5mm, does not contain oxidized interlayer, the highest price, mainly used for pulling monocrystalline silicon. Cauliflower material surface is slightly rough, the degree of depression of the particles between 5 and 20 mm, the price of mid-range. Coral material surface depression depth of more than 20 mm, the lowest price.

- Pelletized silicon: In granular form, about 2 mm in diameter, with a large surface area, susceptible to contamination, and usually vacuum-packed. Granular silicon is susceptible to contamination during transportation and processing, but has advantages in certain applications.

OEM 2202 3303 411 553 Grade Metallic Si Pure Silicon Metal

Categorized by purity

- Metallurgical grade polysilicon (mg-si): Purity between 99.999% and 99.9999% (i.e., 5n to 6n grades), mainly used in construction, textile, automotive and machinery.
- solar grade polysilicon (sog-si): Purity between 99.9999% and 99.9999999% (i.e., 6n to 9n), mainly used in the production of photovoltaic (pv) crystalline silicon cells, where the improvement of purity is essential to enhance the conversion efficiency of pv cells. The improvement of purity is crucial to enhance the conversion efficiency of photovoltaic cells.

- Electronic grade polysilicon (seg-si): Purity above 9n, mainly used in the manufacture of silicon polished wafers, solar cells and high-purity silicon products. Electronic grade polysilicon has higher requirements for power electronics applications, with a purity of 11n or more.

Packing & Delivery

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FAQ

Q: What is the term of payment?

A: T/T,L/C

Q: How many tons can you supply for each month?

A: 5000MT

Q: What is your MOQ?

A: 20MT

Q: Are you trade company or manufacturer?

A: Manufacturer.We have our own factory.

Q: How does the company serve?

A: Our company has been established for many years has established a perfect service system:
I. Positive communication at the early stage:
Reply to inquiry → send photos of company qualification → invite factory inspection → update quotation in time → keep track
II. Medium-term win-win cooperation:
Contract → deposit to prepare goods → loading and shipping → production follow up
III. Real-time cargo tracking:
Since the forwarder takes a copy of the bill of lading → inform the ship has sailed → balance payment charged → telex release of the bill of lading
IV. Regular return visit at later stage:
Search customer feedback → make summary → assign improvement plan → follow up service

Q: How to pay and ship?

A: Our company delivery method using telegraphic transfer or letter of credit, delivery time to receive the advance payment within ten days of delivery, we have a professional logistics system to ensure the safety of your goods and fast arrival, please rest assured to buy!

Q: About the after-sale service, how can you solve the problems occurred of your overseas customer in time?

A: The warranty of our machine is normally 12 months, during this period, we will arrange the international express immediately, to make sure the replace parts to be delivered as soon as possible.

Q: Advantages of the business team?

A: Talent is an important factor in the development of the company. The stellar sales team is a young, well-educated, well-qualified, energetic and passionate team.After strict screening and professional training, we are familiar with the professional knowledge and business process of domestic and international trade, and have a keen perception and insight of ferroalloy market. We can provide you with the most professional industry evaluation and industry dynamic analysis.

Q: What is polysilicon made of?

A: It is made of multiple tiny crystals of silicon fused together. It has an irregular atomic structure compared to pure crystalline silicon.

Q: Why is polysilicon important?

A: It is critical for manufacturing integrated circuits and solar cells - two technologies that are extremely vital in the modern world. Its electrical properties enable efficient devices.

Q: What is polysilicon used for?

A: The two main applications are:
Integrated circuits and microchips used in electronics
Photovoltaic cells in solar panels for generating renewable energy

Q: What is polysilicon solar?

A: It refers to ultra-pure polysilicon specially produced for photovoltaic cells in solar panels. It requires meticulous refinement to be 99.9999999% pure to enable high-efficiency solar energy harvesting.

Q: How much does polysilicon cost?

A: As of 2022, solar-grade polysilicon costs roughly $35 - $45 per kg. The ultra-refinement process makes it expensive. Electronics-grade polysilicon costs around $10 - $15 per kg.

Q: Which country produces the most polysilicon?

A: China is the dominant global producer of polysilicon, accounting for over 80% of total world production. The next biggest producers are Germany and the United States.

Q: How is polysilicon made?

A: There are two main methods to produce high-quality polysilicon that can be used for solar cell manufacturing: the Siemens process and fluidized bed reactor (FBR) technology. A third method — upgraded metallurgical-grade (UMG) silicon — was also in use for a short time. UMG utilized physical methods to purify the raw material of metallurgical-grade silicon such as vacuum melting and directional solidification of molten silicon, but these practices struggled to take prominence and were abandoned.

Q: What is the difference between monocrystalline silicon and polycrystalline silicon?

A: The main difference between the two technologies is the type of silicon solar cell they use: monocrystalline solar panels have solar cells made from a single silicon crystal. In contrast, polycrystalline solar panels have solar cells made from many silicon fragments melted together.

Q: Can you mix polycrystalline with monocrystalline?

A: Yes they will work. Keeping the panel characteristics exactly the same is helpful in maximising performance from the system, but you wont do any damage mixing the solar panels. There are reports of solar breakthroughs often.

Q: What is polycrystalline silicon used for?

A: Polycrystalline silicon, also known as polysilicon, is a key material used in the production of solar cells and in the electronics industry, particularly for gate electrodes in MOS devices, resistors, and interconnects.

Q: How efficient is polycrystalline silicon cell?

A: Polycrystalline panels have lower efficiency rates typically in the 13-16% range. Monocrystalline panels have higher efficiencies in the range of 15-20%.

Q: Does polycrystalline silicon conduct electricity?

A: Poly-crystalline silicon (poly-Si) is widely used as a metallic or semiconducting thin film because it exhibits excellent and controllable conductivity and can be conformally deposited with good uniformity at low cost.

As one of the most professional polycrystalline silicon manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy polycrystalline silicon in stock here from our factory. For customized service, contact us now.

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