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High-Purity Quartz Powder

High-Purity Quartz Powder

-- Steady & Reliable Manufacturer --

Introduction

High-Purity Quartz Powder (also known as Fused Silica Flour or SiO2​ powder) is a foundational raw material derived from crushed and refined natural quartz or synthetic fused silica. This product is characterized by its extremely low impurity content (often ppm or ppb level of trace metals), excellent thermal stability, and low coefficient of thermal expansion (CTE). Yancheng Mingyang Quartz Products Co., Ltd. supplies various grades of this powder, essential for high-tech industries where material purity is the primary concern, such as electronics, advanced ceramics, and specialized composite manufacturing. Our manufacturing process involves acid washing, high-temperature firing, and precise jet milling to achieve the required purity and a tightly controlled particle size distribution (PSD).

The main application for the highest grades of quartz powder is as a filler material in Epoxy Molding Compounds (EMC) used to encapsulate integrated circuits (ICs). The low CTE of the quartz powder helps match the thermal expansion of the copper leads and the silicon chip, preventing stress-induced failures in the electronic package during temperature cycling. We offer various powder morphologies, including angular (crushed) and spherical, with spherical powders offering superior flowability and higher packing density, which improves the final EMC performance and reduces mold wear. Another critical market is the refractory industry, where the powder is used to create investment casting shells and high-temperature liners that require chemical inertness and resistance to thermal shock. We provide detailed analyses of trace elements (K, Na, Fe, Li) and OH content for every batch, guaranteeing consistency for $\text{OEM}$s who cannot tolerate batch-to-batch variation in their critical formulations. Our capability to produce powder with tailored particle size distributions (e.g., bimodal or trimodal blends) ensures optimal performance for complex rheological applications.

By supplying this fundamental high-purity raw material, we enable the production of advanced electronic components and specialized refractory materials that are essential for high-tech manufacturing globally.

Specification Parameters

ParameterDetails
Purity (SiO2​)Electronic Grade: ≥99.995% (Trace elements <10 ppm)
Particle MorphologyAngular (Crushed) or Spherical (High flowability/Packing)
Particle Size (D50​)Customizable from 0.5 μm to 150 μm (Tightly controlled distribution)
Trace Elements (Example)U/Th <0.1 ppm; Na/K/Fe in ppb range for EMC grade
Moisture/VolatilesLow, typically <0.05% after vacuum drying
Specific Gravity2.20 g/cm3 (Fused Silica)
Thermal PropertyNear-zero CTE (0.5×10−6/K)
Application GradeElectronic Grade, Refractory Grade, Investment Casting Grade

The defining technical characteristic of High-Purity Quartz Powder is its Electronic Grade Purity, with trace element analysis often required in the parts per billion (ppb) range. This ultra-low contamination is necessary because any mobile ions (like Na+, K+) in the EMC filler material can cause leakage or failure of the integrated circuit. We use highly controlled chemical purification (acid washing) and high-temperature treatment to achieve this extreme purity. The Particle Morphology is also a critical design choice: Spherical Powder is created using a high-temperature plasma process and provides superior packing density (reducing resin consumption) and reduced viscosity (improving flowability during molding), which is a key requirement for high-volume IC packaging. We employ laser diffraction for precise measurement and certification of the Particle Size (D50​) and the overall PSD, ensuring the powder integrates predictably into the client's polymer matrix. The powder's inherited Near-Zero CTE from fused silica is the functional property that prevents thermal mismatch and failure in the final electronic component, providing long-term reliability under temperature cycling.

Applications

  • Epoxy Molding Compounds (EMC): Used as a low-CTE filler material to encapsulate and protect integrated circuits (ICs) and other electronic components from physical and thermal damage.

  • Advanced Composite Materials: Incorporated into circuit board substrates, radomes, and aerospace components to reduce thermal expansion and improve dimensional stability.

  • Investment Casting: Used to create highly precise, chemically resistant shells and molds for casting specialty alloys for aerospace and medical components.

  • High-Purity Refractories: Employed as a key ingredient in lining materials and refractory bricks for specialized high-temperature furnaces and kilns requiring chemical inertness.

  • Dental and Medical Composites: Used as a non-toxic, high-strength filler in dental restorative materials and orthopedic cement due to its purity and low reactivity.

  • Specialty Coatings: Incorporated into high-temperature or chemical-resistant paint and coatings for industrial equipment.

The reliability of the final product in these applications is directly dependent on the purity and consistency of the quartz powder. For EMC, the ultra-low Na and K content minimizes electrical failures in the IC. For investment casting, the high refractory temperature and low CTE of the powder ensure the mold maintains its perfect shape during the high-temperature casting process, leading to high-precision metal parts. We offer specialized surface treatments (e.g., silane coupling agents) on our powder to improve the bonding and compatibility with specific polymer resins, which further enhances the mechanical strength and thermal performance of the final composite. By offering both angular and spherical grades with precise PSD control, we provide raw material solutions for maximizing filler loading in both liquid and solid compounding systems. We package the powder in cleanroom-compatible, sealed bags to maintain the critical purity level during shipping and storage, ensuring that the client receives a contamination-free raw material ready for immediate use.

Advantages

  • Ultra-High Purity (Electronic Grade): Trace elements in the ppb range eliminate electrical failures from mobile ions in sensitive electronic components.

  • Near-Zero Thermal Expansion: Prevents stress-induced failures in composites and electronic packages during extreme temperature cycling.

  • Excellent Flowability (Spherical Grade): High packing density and low viscosity improve EMC molding efficiency and reduce equipment wear.

  • Customizable Particle Size Distribution (PSD): Tailored D50​ and PSD to optimize filler loading and rheology for complex polymer and casting formulations.

  • High Refractory Temperature: Suitable for use in high-temperature molds, refractories, and high-heat composites.

  • Guaranteed Consistency: Rigorous QC and trace element analysis reports ensure verifiable batch-to-batch consistency for critical OEM production.

The overall advantage is providing a highly engineered raw material that directly contributes to the reliability and performance of the client's final high-tech product. Our ability to supply specialized Spherical Powder and certify purity down to the ppb level distinguishes our offering in the electronic and advanced materials market. We offer technical support to help clients optimize their formulations, leveraging the unique thermal and rheological properties of our various quartz powder grades. This partnership approach ensures the most efficient use of this high-value raw material.

Payment and Shipping

We accept standard business payments including T/T and L/C. Due to the high value and constant demand for this raw material, we offer long-term supply agreements with favorable bulk pricing for EMC and refractory manufacturers.

Shipping Protocol for Powder: Strict measures are taken to prevent contamination and moisture absorption.

  • Sealed, Multi-Layer Packaging: Powder is vacuum-sealed in HEPA-filtered, anti-static plastic bags, often with an outer aluminum foil barrier to prevent moisture ingress.

  • Drums or Crates: Bags are secured within high-strength fiber drums or wooden crates to prevent puncture or damage during freight.

  • Freight: Utilizing reliable air and sea freight globally. Each shipment includes a Certificate of Analysis (CoA) detailing the trace element profile and PSD.

Lead times for standard angular powder are 10−15 working days; spherical or custom-sized powder may require 4−6 weeks for specialized processing. We guarantee the purity upon arrival.

Frequently Asked Questions (FAQ)

  • Q: Why is the CTE of quartz powder so important for electronic packaging (EMC)?

  • A: The CTE of the quartz powder (0.5×10−6/K) is very low, similar to the CTE of the silicon chip itself. By using quartz as a filler, the overall CTE of the EMC compound is lowered, reducing the thermal stress mismatch between the chip and the plastic packaging during temperature cycling, thus preventing solder joint fatigue and chip failure.

  • Q: What is the main benefit of using spherical quartz powder over angular?

  • A: Spherical powder has superior flow characteristics, allowing for higher filler loading in the EMC (up to 90 wt%) and reducing the viscosity of the compound. This allows faster and defect-free molding of the electronic package and significantly reduces wear on the injection molding equipment.

  • Q: How do you guarantee the purity of the quartz powder?

  • A: We use a multi-step process: starting with highly purified raw material, followed by acid washing and high-temperature fusion. Purity is verified using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to analyze trace elements in the ppb range, and a CoA is issued with every batch.

  • Q: Is the powder toxic or hazardous to handle?

  • A: Fused silica itself is chemically inert and non-toxic. However, like any fine powder, proper PPE (dust masks/respirators) must be used during handling to prevent inhalation of fine particles, and a full MSDS is provided with the product.

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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