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Quartz Fiber and Insulation

Quartz Fiber and Insulation

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Introduction

Quartz Fiber and Insulation materials are products derived from drawing molten fused silica into extremely thin fibers, which are then processed into textiles, bulk wool, or rigid insulation boards. These materials possess the same exceptional properties of bulk fused quartz—high-temperature resistance (up to 1250∘C continuous), excellent electrical insulation, and chemical inertness—but in a highly flexible, low-density fibrous form. Yancheng Mingyang Quartz Products Co., Ltd. provides these materials for applications requiring the highest level of thermal and chemical protection in extreme environments, particularly where performance superior to fiberglass or ceramic fiber is needed. Quartz fiber materials contain over 99.95% SiO2​, ensuring minimal shrinkage and outgassing when exposed to high heat.

Quartz fiber products are classified based on their final form. Quartz wool is a loose, low-density insulation used for filling difficult voids or packing high-temperature columns (e.g., gas chromatography). Quartz cloth and sleeving are flexible fabrics used as thermal wraps, fire barriers, welding blankets, or high-temperature gaskets and seals. The high-temperature stability and low thermal conductivity of quartz fiber provide exceptional thermal insulation, making it ideal for aerospace components, furnace lining insulation, and thermal shielding in advanced manufacturing. Unlike ceramic fibers, quartz is non-carcinogenic and non-respirable, offering a safer alternative for high-temperature work environments. Furthermore, quartz fiber is an excellent dielectric material, often used to reinforce high-frequency circuit boards or as transparent windows in microwave/radar equipment due to its low dielectric constant and low loss tangent. We offer these materials in various weave patterns, densities, and thicknesses, meeting custom requirements for flexibility, strength, and thermal performance.

By leveraging the superior properties of fused silica in a fibrous structure, we provide high-performance thermal and electrical insulation solutions for the most demanding high-tech and extreme-temperature applications.

Specification Parameters

ParameterDetails
Material CompositionHigh Purity Fused Silica (≥99.95% SiO2​)
Fiber DiameterTypically 5 μm to 10 μm
Max Operating TempContinuous use up to 1050∘C to 1250∘C (Dependent on contamination)
Thermal ConductivityExtremely low (∼0.035 W/m⋅K at room temperature)
Forms AvailableWool/Bulk Fiber, Continuous Thread/Yarn, Woven Cloth/Fabric, Sleeving, Rigid Board
Shrinkage at 1000∘CMinimal, typically <1%
Electrical PropertyExcellent dielectric constant and loss tangent (low loss at high frequencies)
Chemical ResistanceInert to most acids, bases, and organic compounds (except HF)

The exceptional performance of Quartz Fiber and Insulation stems from the Material Composition—nearly 100% SiO2​. This purity ensures the Max Operating Temp can reach 1250∘C with minimal structural change or outgassing, unlike less pure silica or ceramic fibers that contain fluxing agents that cause shrinkage and devitrification. The fibrous structure gives the material its incredibly low Thermal Conductivity, making it a highly effective insulator by trapping air (or vacuum). This is particularly useful in vacuum furnaces and demanding thermal environments like rocket nozzles. The Electrical Properties are often utilized in specialized electronic applications; fused silica’s stable, low dielectric constant (around 3.7) makes the fabric an ideal reinforcing material for printed circuit boards (PCBs) used in high-frequency wireless and radar systems, providing superior signal integrity compared to traditional E-glass fiberglass. We ensure the Fiber Diameter is tightly controlled during the drawing process to maintain the material's flexibility and handling characteristics. The material's non-combustible and non-hazardous nature offers a safer alternative to older refractory materials, eliminating the health concerns associated with airborne ceramic microfibers.

Applications

  • Aerospace and Defense: Used as thermal protection systems, ablation shields, and insulation for rocket engines, exhaust ducts, and high-performance aircraft.

  • High-Temperature Furnace Insulation: Lining industrial furnaces (vacuum, induction, resistance) and hot zones, offering superior insulation and purity compared to ceramic wool.

  • Welding and Fire Protection: Fabricated into welding blankets, curtains, and personnel heat shields that can withstand continuous exposure to molten splatter and flame.

  • Gas Chromatography (GC) and HPLC: Quartz wool is used as inert packing material for injection ports and separation columns in analytical instruments.

  • Electronic Reinforcement: Quartz fabric is used as a reinforcing material in specialized printed circuit boards (PCBs) for high-speed digital and RF applications.

  • Composite Tooling: Used as high-temperature release fabric or tooling blanket in the manufacturing of advanced carbon and glass fiber composites.

The versatility of quartz fiber allows it to perform functions that other materials cannot, particularly the combination of high temperature, high purity, and low electrical loss. For furnace manufacturers, the ability to use a low-density, high-purity insulation significantly reduces the furnace's thermal mass and heat-up/cool-down time. For the aerospace industry, the material's superior ablation resistance and thermal shock performance are essential for safety and reliability. We custom-produce the material in specific thread counts, weave patterns (e.g., satin, plain), and thicknesses to optimize for either mechanical strength, flexibility, or thermal performance depending on the client’s need. We also offer needled or rigidized quartz board for structural insulation, combining high-temperature capability with mechanical integrity. The safety of the material—non-hazardous and non-respirable—is becoming an increasingly important factor for compliance in industrial environments.

Advantages

  • Extreme Temperature Stability: Safe for continuous use up to 1250∘C, exceeding the performance limits of most fiberglass and certain ceramic fibers.

  • Superior Thermal Insulation: Low thermal conductivity in bulk forms provides exceptional energy efficiency in high-temperature furnace designs.

  • High Purity & Chemical Inertness: ≥99.95% SiO2​ minimizes outgassing and prevents chemical reaction, critical for high-purity vacuum furnace environments.

  • Excellent Dielectric Properties: Low electrical loss makes it ideal for RF transparency and reinforcement of high-frequency electronics.

  • Non-Hazardous: Unlike ceramic fibers, quartz fiber is non-carcinogenic and safer for handling and long-term use in industrial settings.

  • Flexible Fabrication: Available in diverse forms (thread, cloth, wool, rigid board) to meet all high-temperature sealing, wrapping, and insulation requirements.

The unique advantage is the combination of thermal performance and purity without the drawbacks of traditional high-temperature fibers. We provide the full range of final product forms, ensuring the client can source all their high-temperature insulation and fabric needs from a single, quality-controlled source.

Payment and Shipping

We accept standard business payments (T/T, L/C). For specialized aerospace or PCB grades, material certification and quality documentation fees may be included.

Shipping Protocol for Fiber and Insulation: Protection from moisture and compression.

  • Moisture Protection: Bulk wool, cloth, and sleeving are vacuum-sealed or packaged with desiccant to prevent moisture absorption, which can temporarily reduce insulation properties.

  • Compression Avoidance: Rigid boards are shipped in custom, firm cartons to prevent corner damage. Wool is shipped lightly compressed in sturdy bags or boxes.

  • Documentation: Shipments include CoA confirming SiO2​ purity and thermal performance data.

Lead times for standard quartz wool and cloth are 2−3 weeks. Custom weave patterns, fiber sizes, or specialized coatings can extend lead times to 6−8 weeks.

Frequently Asked Questions (FAQ)

  • Q: How does quartz fiber compare to traditional fiberglass in high-temperature applications?

  • A: Standard E-glass fiberglass has a max temperature of ∼550∘C. Quartz fiber, being nearly pure SiO2​, operates safely up to 1250∘C with minimal shrinkage, making it far superior for high-temperature use.

  • Q: Is quartz fiber material itchy or dangerous to handle?

  • A: While all fibrous materials require caution, quartz fiber is non-respirable and non-carcinogenic, making it safer than traditional ceramic fibers. Proper personal protective equipment (PPE) is still recommended for handling.

  • Q: Can quartz cloth be used in a vacuum or inert gas furnace?

  • A: Yes, it is highly suitable. Due to its high purity (≥99.95% SiO2​), it exhibits very low outgassing and maintains its insulating and structural integrity in high vacuum and inert gas atmospheres (e.g., Argon) at extreme temperatures.

  • Q: What is the dielectric constant of quartz fiber, and why is it important for \text{PCB}$s?\\\\\\

    \A: The dielectric constant ($\text{D}_{\text{k}}) of fused silica is very low (∼3.7) and stable over frequency. A low, stable Dk​ minimizes signal attenuation and impedance variations in high-frequency circuit boards, ensuring high signal integrity in RF and microwave applications.

From Made-in-China to
Global Smart Manufacturing

Yancheng Mingyang Quartz Products Co., Ltd. is a company specializing in the production of quartz and special glass products. Yancheng Mingyang Quartz Products Co., Ltd. is the production plant of Jinzhou Mingde Quartz Glass Co., Ltd. in Jiangsu, Since its establishment, the company has developed rapidly, introduced advanced technology and production equipment at home and abroad, and continuously improved and improved product quality. Relying on its own advantages, we have developed a variety of products suitable for the market and meet the needs of different customers, and solved many urgent production problems for our customers.

The company's products include quartz glass tubes, double-hole quartz glass tubes, quartz glass rods, quartz sheets, sapphire windows, calcium fluoride glass windows, infrared ultraviolet coatings, high-pressure resistant aluminosilicate glass window panels, quartz glass instruments, high borosilicate glass instruments, quartz crucibles, quartz gold-plated tubes, quartz heaters, quartz infrared heating tubes, far-infrared directional radiation heaters ultraviolet germicidal lamps and other special types of quartz glass products.

Yancheng Mingyang Quartz Products Co., Ltd.
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