Featured Quartz Components & Industrial Emitters
Direct OEM/ODM production leveraging high-purity crystalline silica from Donghai, Jiangsu. Every piece is precision ground, laser-profiled, and batch-verified for rigorous thermal, optical, and mechanical applications.
The Engineering Physics of Fused Quartz Glass Plates
Fused quartz plates and fused silica substrates constitute the foundational baseline for contemporary thermal engineering, semiconductor lithography, spectrophotometry, and laser containment. Sourcing directly from China's primary silica refining corridor ensures unmatched material integrity and commercial scalability.
Synthetic vs. Natural Fused Silica
Understanding the distinction between natural fused quartz (refined from natural quartz crystal) and synthetic fused silica (synthesized from silicon tetrachloride gas via chemical vapor deposition) is paramount for procurement engineers. Natural quartz plates provide exceptional high-temperature stability, low dielectric loss, and superior mechanical rigidity up to 1200°C. Synthetic silica delivers near-zero trace-element contamination (ppb levels) and exceptional deep-ultraviolet (DUV) transmission down to 185 nm, indispensable for excimer laser optics and microelectronic lithography masks.
Thermal Shock Resistance Dynamics
The near-zero coefficient of thermal expansion (CTE ≈ 5.5 × 10⁻⁷/K from 20°C to 1000°C) gives quartz glass plates thermal shock resistance that outperforms borosilicate, soda-lime, and aluminosilicate glasses. A heated quartz plate can be instantly plunged from 1100°C into cold water without structural fracture or micro-cleaving. This property makes Kavri quartz plates essential for industrial furnace viewports, semiconductor wafer diffusion boats, high-intensity plasma flash lamps, and military-spec thermal imaging shields.
Spectral Transmission Spectrum
Kavri Quartz plates are categorized by their optical transmission band: JGS1 (Synthetic Silica, UV-grade, passing 185nm–2500nm), JGS2 (Optical Grade Quartz, transmitting 220nm–2500nm), and JGS3 (Infrared Optical Quartz, transmitting 260nm–3500nm with minimal water-absorption peaks at 2.73 μm). By fine-tuning hydroxyl (OH⁻) content via vacuum fusion or electric furnace refining, our plates eliminate optical scattering, maximizing irradiance transmission in sensitive biochemical analyzers, UV-curing exposure engines, and IR heat processing chambers.
Standard Physical & Thermodynamic Properties
Precision benchmarks governing fused quartz plates exported by Kavri Quartz Product Co., Ltd. Confirmed through rigorous laser interferometry and batch spectrophotometric testing.
| Physical / Mechanical Property | Metric Value | Imperial Equivalent | Engineering Relevance |
|---|---|---|---|
| Density (ρ) | 2.20 × 10³ kg/m³ | 0.0795 lb/in³ | Low mass-to-volume ratio reduces structural inertia in dynamic kinematic optics. |
| Modulus of Elasticity (Young's) | 7.2 × 10⁴ MPa | 1.04 × 10⁷ psi | Exceptional rigidity prevents deflections under intense vacuum pressures. |
| Poisson's Ratio (ν) | 0.17 | 0.17 | Minimal lateral expansion under uniaxial compressive mechanical loads. |
| Compressive Strength | 1150 MPa | 166,790 psi | Immense mechanical resistance against positive pressure sight-glass applications. |
| Tensile Strength (Design Limit) | 48 MPa | 6,960 psi | Includes industry standard 5x safety factor for optical window pressure containment. |
| Softening Point | 1683 °C | 3061 °F | Maintains amorphous glass structure well past the melting point of common metals. |
| Annealing Point | 1215 °C | 2219 °F | Stress-relieving temperature applied during secondary precision flattening. |
| Strain Point | 1120 °C | 2048 °F | Upper thermal boundary for continuous, permanent zero-creep mechanical performance. |
| Dielectric Constant (ε) | 3.75 (at 1 MHz) | 3.75 | Ultra-low RF loss tangent makes it transparent to high-frequency microwave fields. |
| Refractive Index (nD at 589.3 nm) | 1.4585 | 1.4585 | Homogeneous optical baseline for anti-reflective thin film and mirror sputtering. |
Emerging Trends in Global Quartz Glass Procurement
Global supply chains are shifting rapidly due to the expansion of third-generation semiconductors (SiC/GaN), high-power industrial laser processing, and large-format photovoltaic manufacturing. Stay ahead of capacity shifts, yield challenges, and fabrication technologies.
1. Sub-Nanometer CMP Polishing & Ultra-Flatness
Standard mechanical lap-polishing no longer satisfies next-generation photonic sensors, wafer-level packaging, and advanced lithography stepper stages. Global procurement is pivoting toward Chemical Mechanical Planarization (CMP), demanding surface roughness below Ra < 0.5 nm and optical transmitted wavefront errors below λ/10 (≤63.28 nm). Kavri Quartz has expanded double-sided planetary polishing capabilities to deliver sub-arcsecond parallelism on plates up to 500 mm square.
2. Large-Format Synthetic Substrates for Green Tech
The rapid scale-up of 8-inch Silicon Carbide (SiC) epitaxial growth and TopCon/HJT solar cell manufacturing has triggered unprecedented demand for oversized quartz plates (exceeding 800 mm × 800 mm × 30 mm). These high-thermal-shock plates serve as chamber liners and RF transparent heating windows. Suppliers with integrated ingot synthesis and large-bed 5-axis CNC ultrasonic contouring are dominating high-margin vendor lists.
3. Zero-Carbon & Hydrogen-Fueled Quartz Refining
Thermal fusion of quartz raw sand requires sustained temperatures above 2000°C. As European and North American procurement directives enforce strict Scope 1, 2, and 3 carbon accounting, tier-1 Chinese manufacturers are actively replacing legacy hydrocarbon furnaces with clean-burning oxy-hydrogen systems and electric-arc plasma vacuum furnaces. This shift simultaneously decreases carbon intensity while eliminating carbon micro-inclusions in optical-grade fused silica.
Why Source from Kavri Quartz Product Co., Ltd.?
Located in Lianyungang, Jiangsu — directly adjacent to Donghai, China's world-renowned quartz capital — Kavri Quartz provides an unbroken supply chain from raw silica refining to finished optical inspection.
Donghai Industrial Cluster Proximity
Our direct presence in the Donghai quartz basin gives us prioritized access to the highest-purity crystalline quartz sand deposits in China. This geographic advantage eliminates domestic freight markups, insulates production schedules against material shortages, and reduces per-unit costs for overseas OEM partners.
Verified Manufacturing Facility
Founded in 2014, our manufacturing infrastructure spans 3 specialized production lines, full thermal processing halls, optical polishing bays, and an on-site testing laboratory. Our company profile and export legitimacy are independently verified by Alibaba.com and global third-party inspection firms.
Custom CNC & Flame Micro-Machining
We process beyond flat geometries. Our facility is equipped with 5-axis CNC waterjets, ultrasonic drills, cylindrical polishers, and high-temp glass lathes. We execute complex hole arrays, countersinks, optical step-bevels, curved viewing viewports, and fused hermetic quartz assemblies directly from customer CAD drawings.
Global Incoterm & Logistics Mastery
Over 81%–90% of our annual production is exported to buyers in Germany, the Netherlands, the United States, Japan, and South Korea. We offer FOB, CIF, CFR, and complete DDP door-to-door delivery. Custom packaging includes multi-layer foam, vacuum sealing, and fumigated timber crates with impact-indicator monitors.
Strict Quality Assurance Protocols
Every shipment is backed by comprehensive Certificates of Conformance (CoC). Inspection includes Zygo interferometric flatness mapping, PerkinElmer UV-Vis-NIR spectrophotometer transmission curves, polariscope strain analysis, and micrometer dimensional reports matching ISO 2768-m tolerances.
Fast Engineering & Prototype Delivery
We respond to all technical inquiries, RFQs, and custom specification requests within 4 hours. Standard prototypes and custom quartz plate cut-to-size samples are typically manufactured and dispatched via DHL/FedEx within 5 to 7 business days, expediting our clients' development cycles.
Frequently Asked Technical & Sourcing Questions
Detailed answers to the most common questions raised by procurement managers, optical engineers, and quality assurance inspectors when importing quartz glass plates from China.
What is the difference between JGS1, JGS2, and JGS3 quartz plates?
What dimensional tolerances and surface finishes can your facility achieve?
How do quartz glass plates perform against aggressive chemicals and acids?
Can you supply customized hole drilling, steps, and complex edge chamfering?
What is your Minimum Order Quantity (MOQ) and production lead time?
How do you prevent micro-cracking and transit breakage during international shipping?
Connect Directly with Kavri Quartz Application Engineers
Whether you need custom-shaped high-temperature viewports, precision JGS1/JGS2/JGS3 fused silica substrates, or specialized replacement infrared emitters, our engineering team in Lianyungang will review your CAD drawings and provide competitive factory-direct pricing within 4 hours.