Semiconductor

The Semi-Conductors Manufacturer!

Alfa Quartz was established in 2013. It is a manufacturer that researches, develops, produces, and sells high-quality semiconductor quartz components, quartz glass instruments, optical quartz glass sheets, PV (Photovoltaic) quartz boats/boat trays, and other accessories.

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Why choose us

Professional Team

We provide leading providers of analysis, testing, quality assessment, and failure analysis solutions. As a recognized expert in the field of glass, we provide our customers with reliable solutions, explanations and recommendations.

Best Quality Control

In order to present the best performance, we conduct high standard tests each product between every step. It is guaranteed that our products are qualified by ISO 9001, RoHs, HF and REACH certifications.

Main Market

Our quartz products are sold well in many countries such as the United States, Germany, the United Kingdom, Canada, Japan, and South Korea.

Our company provides the following products

Quartz Flange

High purity
High transparency
High temperature resistant
Corrosion resistant

Physical Properties	Values
Purity	＞99.99%
Density	2.2g/cm³
Transparency	＞90%
Mohs Hardness	5.5--6.5
Deformation Point	1280℃
Softening Point	1780℃
Annealing Point	1250℃
Specific Heat (20 - 350°C)	670J/kg.℃
Thermal Conductivity (20°C)	1.4W/m.℃
Heat Conductivity (w/m.k,1000 ℃ )	1.0-1.2
Refractive Index	1.4585
Coefficient of Thermal Expansion	5.510 ^-7cm/cm.℃
Hot - working Temperature	1750~2050℃
Short - term Service Temperature	1300℃
Long - term Service Temperature	1100℃

Key Features of Quartz Flange

High Purity Material

Ensures excellent transparency, thermal stability, and mechanical strength.

High-Temperature Resistance

Can be used for extended periods in high-temperature environments, withstanding temperatures up to 1100°C or more.

Corrosion Resistance

Highly resistant to most acids, bases, and chemical substances, making it ideal for use in aggressive chemical environments.

Superior Mechanical Strength

Quartz material has high hardness and strength, capable of withstanding significant mechanical stress.

Thermal Stability

The low thermal expansion coefficient allows the quartz flange to endure rapid temperature changes without cracking.

Excellent Sealing Properties

Ensures secure connections, preventing leakage at pipe junctions and maintaining system integrity.

Applications of Quartz Flange

Chemical Industry

Quartz flanges are utilized in pipeline connections for processes like pickling and alkali cleaning, leveraging their corrosion and high-temperature resistance for stable operation.

Petrochemical Industry

As essential components in pipe connections, they meet rigorous demands in harsh conditions characterized by high temperatures, pressures, and strong acids/bases, aiding in the connection of pumps and valves.

Electronics Industry

Widely used in precise pipeline connections for LED manufacturing and oxide synthesis in solar cells, quartz flanges ensure high purity and corrosion resistance, essential for maintaining process integrity.

Food Manufacturing

They can be used to transport slightly corrosive materials in food production, ensuring that food safety is maintained without contamination.

Other Applications

Due to their stable physical and chemical properties, quartz flanges are also important in fields like optical light sources, photovoltaic energy, and aerospace manufacturing.

Quartz Bell Jar

Material: 99.99% fused quartz glass (SiO₂)
Technique: Cutting, polishing, drilling, etching, etc.
Size: Custom
MOQ: 1 pcs

Physical Properties	Values
Purity	＞99.99%
Density	2.2g/cm³
Transparency	＞90%
Mohs Hardness	5.5--6.5
Deformation Point	1280℃
Softening Point	1780℃
Annealing Point	1250℃
Specific Heat (20 - 350°C)	670J/kg.℃
Thermal Conductivity (20°C)	1.4W/m.℃
Heat Conductivity (w/m.k,1000 ℃ )	1.0-1.2
Refractive Index	1.4585
Coefficient of Thermal Expansion	5.5*10 ^-7cm/cm.℃
Hot - working Temperature	1750~2050℃
Short - term Service Temperature	1300℃
Long - term Service Temperature	1100℃

Features of Quartz Bell Jar

High Purity: Quartz bell jars are manufactured from high-purity fused quartz to minimize contamination of the samples or materials being processed.

Thermal Stability: Fused quartz exhibits excellent thermal stability and can withstand high temperatures without significant deformation or degradation, making it suitable for thermal processes.

Chemical Inertness: Quartz is highly resistant to most chemicals, ensuring compatibility with a wide range of substances and reaction conditions.

Transparency: Quartz bell jars are transparent to UV and visible light, allowing for visual observation of processes occurring inside the chamber.

Vacuum Compatibility: Bell jars are designed to create and maintain vacuum conditions, with features such as ground glass flanges for secure sealing with vacuum adapters or pumps.

Quartz Bell Jar Application

01.

Semiconductor Manufacturing

In processes such as chemical vapor deposition (CVD) and physical vapor deposition (PVD), quartz bell jars provide a controlled environment for the deposition of thin films on semiconductor wafers.

02.

Coating Processes

They are used in the production of optical coatings, metallic coatings, and other types of thin-film materials that require vacuum deposition techniques.

03.

Research and Development

Quartz bell jars are utilized in scientific research, particularly in physics and materials science experiments that need a high-purity, vacuum-sealed environment.

04.

Educational Demonstrations

In educational settings, they can be used to demonstrate vacuum principles and experiments due to their visibility and durability.

Our factory

The company covers an area of 7,500 square meters with a building area of 9,000 square meters. It has more than 100 employees. The production machines for the cold and hot processing of quartz glass are precise and complete. The processes are mature and stable. The processing technology and product quality have reached a medium to high level in the industry.

FAQ

Q: Can you customize quartz flange?

A: Yes, we can. We can customize your size according to your demands.

Q: How high a pressure can a quartz flange withstand?

A: Applicable to 10⁻⁹ mbar ultra-high vacuum, flange thickness needs to be adjusted according to size (e.g. DN100 flange is recommended to be ≥20mm at 10⁻⁶ mbar).
Positive pressure application: Typical pressure resistance 0.5~1 MPa (depending on the structure), local stress concentration needs to be avoided.

Q: What are the machining limitations of quartz flanges?

A: Risk of brittleness: Mohs hardness 7, but poor impact resistance, drilling/cutting requires laser or diamond tools to avoid mechanical stress.
Precision requirements: Flatness must be ≤0.02mm, surface roughness Ra≤0.1μm to ensure sealing.

Q: How to place order with you?

A: We will quote you after you tell us the details of the quartz products and then making samples if necessary. You make the payment against our PI, and we'll ship out as per the shipping time stated in PI.

Q: How is the packing?

A: Very safe packing in wood case, no worries.

Q: How is the production time?

A: It will depend on the complication of quartz product and how large the order is, normally 1-3 weeks.

Q: How do you ship the order?

A: We can ship by air, sea, couriers like TNT, Fedex, UPS, DHL.

Q: How can we do if products are inferior?

A: Normally there won't be the issue as the quality is under good control, but if that happened, we'll take the 100% responsibility and compensate you.

Q: Can the quartz bell jar be used with hydrofluoric acid (HF)?

A: No. HF reacts with SiO2 to form silicon tetrafluoride (SiF₄), causing irreversible damage. Use PTFE or fluoroplastic chambers for HF-containing processes.

Q: Can the quartz bell jar be sealed under high vacuum?

A: Yes, when paired with compatible gaskets (e.g., copper for ultra-high vacuum, Viton for low/medium vacuum) and flanges (ISO-CF for 10⁻¹⁰ mbar, ISO-KF for 10⁻⁶ mbar). Ensure sealing surfaces are clean and free of scratches.

Q: Does the quartz material block UV light?

A: No, quartz transmits UV light down to 200nm, making it ideal for UV-sensitive applications. For UV-blocking needs, specialized coated quartz or alternative materials are available (contact us for custom solutions).

Q: Can I drill holes or add ports to the quartz bell jar?

A: Yes, through precision machining by our factory. Specify port sizes, locations, and types (gas inlet, electrical feedthrough, viewport) during customization to ensure structural integrity and airtightness.

As one of the leading semi-conductors manufacturers and suppliers in China, we warmly welcome you to wholesale bulk semi-conductors for sale here from our factory. Also, customized service is available.