High Temperature Resistant High Purity Quartz Glass Capillary Tube with Good Electrical Insulation for Industrial Testing

Large Diameter Fused Quartz Tempered Glass Tube

We accept custom orders according to different diameter, thickness, length specifications, or by providing your technical drawings.

• High purity: SiO₂ > 99.99%
• Operating Temperature: 1200℃; Soften Temperature: 1730℃
• Excellent thermal stability
• Superior acid and alkali resistance
• High optical transmittance
• Excellent electrical insulation properties

Quartz glass is an acidic material that demonstrates exceptional chemical stability. It is inert to all acids except hydrofluoric acid and hot phosphoric acid, making it an excellent acid-resistant material. The material is non-hygroscopic and non-weathering.

Quartz glass features high dielectric strength and low electrical conductivity. Even under high temperature, pressure, and frequency conditions, it maintains superior dielectric strength and resistance with minimal dielectric loss, establishing it as an excellent high-temperature dielectric insulation material.

Quartz glass possesses unique optical properties, transmitting both far-ultraviolet spectrum and visible light with near-infrared spectrum. It offers high temperature resistance, minimal thermal expansion coefficient, excellent chemical thermal stability, and optical characteristics comparable to general optical glass.

The thermal expansion coefficient of quartz glass is exceptionally small--only 1/12 to 1/20 that of ordinary glass. Standard testing involves heating specimens to 1200℃ and then rapidly quenching in cold water, withstanding this process more than three times without cracking.

Quartz glass demonstrates superior mechanical properties compared to conventional glass and ceramics, though it exhibits some brittleness. While theoretical calculated strength reaches approximately 24-31.2 MPa, actual measured strength values are typically lower.

The relaxed structure of quartz allows certain gas ions to diffuse through the network even at high temperatures, with sodium ion diffusion occurring particularly rapidly. This property is critically important for specific industrial applications.

Lianyungang Shengfan Quartz Product Factory is a professional manufacturer specializing in research, development, and production of quartz plates, quartz tubes, quartz flanges, quartz rings, cuvettes, and quartz instruments. Located in China's Crystal Capital--Donghai City, Jiangsu Province--the facility is conveniently situated 70 km from Lianyungang port.

Covering 1000 square meters with over 30 employees, we achieve annual sales exceeding USD 5.2 million. Guided by our philosophy of Technology Orientation, Quality First, Integrity and Responsibility, and Sustainable Operation, we are committed to establishing an international enterprise with standardized and sustainable operational capabilities.

We adhere to business integrity, extensive experience, competitive pricing, quality assurance, and excellent after-sales service. We sincerely welcome customers to discuss their requirements and explore collaboration opportunities.