Thermal 1683°C
Clear Refractory Fused Quartz Crucible Bowl Semiconductor Grade
Tensile Strength48 N/mm²
Softening Point1683 °C
Precision Engineered Catalog
High-Purity Quartz & Metallization Substrates
Engineered to meet the exact thermal, optical, and mechanical specifications demanded by laboratory researchers, cleanroom fabs, and high-frequency instrumentation engineers across Ontario.
SPR / Au Ready
SJ-126 Precision Square Fused Quartz Optical Glass Slide Substrate
Surface Flatnessλ/4 - λ/10
SiO₂ Purity≥ 99.995%
Ozone Free
Custom High-Purity Quartz Glass Ampoule & Reaction Flask
FabricationPrecision Welded
Transmission≥ 92% (UV-Vis)
QCM / Sensor Grade
Ultra-Thin Circular Optical Grade Quartz Testing Sheet Disc
Thickness Tol.±0.005 mm
Roughness Ra< 0.5 nm
99.999% Purity
Custom Clear Fused Quartz Process Chamber Tube & Cells
FinishFire Polished
Expansion Coeff.5.5 × 10⁻⁷ /°C
Laser Window Grade
Natural Fused Quartz Polished Plate Laser Observation Disc
Hardness (Mohs)5.5 - 6.5
Parallelism< 30 arcsec
Chemical Purity
SJ-135 High-Purity Quartz Condenser & Distillation Units
Corrosion Rest.Grade I Acid Proof
Continuous Temp1100 °C
Acid/Alkali Resistant
High-Temperature Acid-Resistant Quartz Basket & Crucible
Porosity / Mesh200 - 400 Mesh
Peak Temp1450 °C
Technical Engineering White Paper
Thin-Film Metallization on Fused Quartz: Material Physics & Precision Optics
A comprehensive examination of interface adhesion, dielectric stability, and infrared-to-ultraviolet optical reflectance for high-integrity Canadian research applications.
In high-precision optical, analytical, and photothermal systems, gold-coated quartz occupies a unique intersection of material science. Fused quartz ($SiO_2$) delivers near-zero thermal expansion ($5.5 \times 10^{-7} /^\circ\text{C}$), exceptional chemical inertness against harsh acids (excluding hydrofluoric and hot phosphoric), and high structural stability across temperature excursions extending past $1100^\circ\text{C}$. When combined with an engineered gold ($Au$) thin-film deposited via physical vapor deposition (PVD) or magnetron sputtering, the resulting composite substrate provides specular infrared reflection exceeding 98% in the $700\,\text{nm}$ to $20\,\mu\text{m}$ spectral bandwidth, alongside an electrically conductive, chemically inert surface tailored for molecular self-assembly.
Key Metallurgical Takeaway: Because raw gold exhibits minimal natural chemical affinity for the silicon dioxide lattice, achieving pinhole-free adhesion capable of surviving MIL-M-13508C tape testing requires atomic-level surface preparation and a sub-nanometer transition interlayer (typically 2 to 5 nm of Titanium [Ti] or Chromium [Cr]).
Adhesion Kinetics & Magnetron Sputtering Dynamics
The manufacturing process begins with optical-grade synthetic fused silica or natural high-purity fused quartz mined and refined from select pegmatite veins. The quartz substrate undergoes double-sided planetary chemo-mechanical polishing (CMP) to achieve an atomic surface roughness ($R_a$) below $0.5\,\text{nm}$ (5 Ångströms), with surface scratch-dig ratings held strictly to 20-10 or 10-5 per MIL-PRF-13830B. Any subsurface micro-fracture or residual alkali contamination rapidly causes vapor blistering or peeling when subjected to thermal thermal cycles in semiconductor annealing furnaces or continuous NIR radiant emitters.
Prior to thin-film coating, substrates undergo multi-stage ultrasonic degreasing, piranha acid etching ($H_2SO_4:H_2O_2$ in 3:1 volumetric ratio) to eliminate trace organic adsorbates, and in-situ radio-frequency (RF) argon plasma sputtering inside a Class 1,000 cleanroom vacuum chamber pumped down to $10^{-7}\,\text{Torr}$. Magnetron deposition introduces a precisely metered intermediate adhesion layer: Chromium ($Cr$) is preferred for aggressive cryogenic-to-high-temperature cycling, whereas Titanium ($Ti$) is standard for biomedical and biophotonic Surface Plasmon Resonance (SPR) chips where optical absorption in the visible spectrum must remain tightly controlled. The primary gold layer ($99.999\%$ pure Au) is then deposited without breaking vacuum to a target thickness ranging from $50\,\text{nm}$ (semi-transparent sensor substrates) to $250\,\text{nm}$ (fully opaque first-surface mirrors and industrial infrared heater reflectors).
| Physical / Optical Parameter | Standard Clear Fused Quartz | Semiconductor-Grade Quartz | Gold-Coated Quartz Substrate |
|---|---|---|---|
| $SiO_2$ Purity Content | > 99.99% | > 99.999% | Substrate > 99.999% | Film 99.999% Au |
| Coefficient of Thermal Expansion ($0-1000^\circ\text{C}$) | $5.5 \times 10^{-7} /^\circ\text{C}$ | $5.4 \times 10^{-7} /^\circ\text{C}$ | Interface Compensated ($< 5.6 \times 10^{-7}$) |
| Infrared Reflectance ($1.0 - 15\,\mu\text{m}$) | ≈ 4% (Fresnel Reflection) | ≈ 4% | ≥ 98.2% Specular Reflection |
| Continuous Service Temperature | 1100 °C | 1150 °C | Up to 350°C (film limit) / 950°C (encapsulated) |
| Adhesion Intermediate Layer | N/A | N/A | 3 - 5 nm Sputtered Titanium (Ti) or Chromium (Cr) |
| Surface Roughness ($R_a$) Post-CMP | < 1.5 nm | < 0.8 nm | < 0.3 - 0.5 nm (Super-polished) |
Regional Innovation Ecosystem
Localized Applications in Toronto & Southern Ontario Tech Hubs
How precision gold-metallized fused silica and custom laboratory quartz components empower deep-tech enterprises, universities, and industrial manufacturers across the Greater Toronto Area.
Biophotonics & SPR Biosensors (MaRS Discovery District)
Toronto's Downtown Discovery District, anchored by the MaRS Centre, Princess Margaret Cancer Centre, and the University of Toronto, drives cutting-edge biomolecular interaction analysis. Gold-coated quartz slides functionalized with self-assembled monolayers (SAMs) of alkanethiols serve as the critical transducer interface for Surface Plasmon Resonance (SPR) and localized SPR (LSPR) instruments, measuring label-free kinetic binding of proteins, aptamers, and mRNA therapeutics.
Quantum Computing & Micro-Fabrication (Waterloo-Toronto Corridor)
Within the Waterloo-Toronto quantum tech supercluster, cleanroom facilities require ultra-low dielectric loss substrates. Gold-coated quartz wafers act as resilient grounding planes, coplanar waveguides, and patterned electrode stages operating under millikelvin dilution refrigerator conditions, providing uncompromised planar flatness and cryogenic stress endurance without film delamination.
Photothermal Annealing & Infrared Emitting (Markham / Mississauga)
Advanced automotive component suppliers, optical instrumentation builders, and clean-tech equipment manufacturers in Markham and Mississauga utilize gold-jacketed dual-tube quartz infrared lamps. The internal 180° directional gold reflector reflects up to 98% of thermal radiation directly onto process zones, halving energy loss in rapid thermal processing (RTP) and PET preform stretch-blow molding.
Strategic Sourcing & Industry Dynamics
Emerging Procurement & Technology Trends in Ontario's Tech Triangle
Market intelligence analyzing how supply chain reconfiguration, semiconductor subsidies, and high-frequency diagnostics are driving quartz demand in Canada.
1. Rise of Point-of-Care Microfluidic QCM-D Sensors
The rapid shift toward decentralized disease detection and water quality monitoring throughout Ontario has elevated demand for Quartz Crystal Microbalance with Dissipation (QCM-D) sensors. 5 MHz and 10 MHz AT-cut fused quartz discs with patterned gold electrodes are increasingly specified with strict resonance frequency tolerances (±2 kHz), driving procurement toward direct-from-factory custom glass fabricators capable of micron-level edge beveling.
2. Supply Chain Diversification & Cross-Border Compliance
Canadian photonics corporations and university procurement offices are increasingly sidestepping multi-tiered domestic distribution markups. Sourcing directly from verified manufacturers in prime crystal clusters (such as Donghai) with established third-party audit credentials (TÜV Rheinland, CE, RoHS) delivers cost reductions of 35% to 50% while guaranteeing documented raw material purity and drawing conformance.
3. Decarbonization via Industrial High-Efficiency Infrared Reflectors
With industrial electricity tariffs across Ontario incentivizing peak-demand reductions, manufacturing facilities are retrofitting legacy ceramic and quartz resistance heaters with gold-coated quartz directional emitters. The gold coating acts as a selective back-surface optical barrier, focusing directional heat flux and eliminating the need for bulky external reflector cooling loops.
Engineering a Custom Thin-Film Quartz Substrate?
Our optical fabrication engineers review your 2D/3D CAD drawings for thermal stress mitigation, coating uniformity, and dimension tolerances within 24 hours.
Enterprise Manufacturing Superiority
Integrated Core Strengths: From Raw Crystal to Finished Component
Combining the mineral resource wealth of China's crystal capital with international auditing standards to serve Toronto's discerning engineering community.
Donghai Supply Chain
Headquartered at No. 9 Dingxin Road, Donghai Economic Development Zone, we draw directly upon high-purity quartz silica sand deposits, guaranteeing consistent raw material lots with total elemental metallic impurities under 10 ppm.
TÜV Rheinland Verified
Our production facilities, hot flame-working lathes, cleanroom packaging areas, and legal operational entity undergo regular on-site verification by TÜV Rheinland, backed by full CE and RoHS product compliance documentation.
Hot & Cold Machining
Integrated capabilities under one roof: oxy-hydrogen bench glass-blowing, precision diamond sawing, laser cutting, double-sided optical lapping, ultrasonic hole core drilling, and computer-controlled electric de-stress annealing ovens.
Toronto Air-Freight Packing
Fragile optical quartz parts are individual sealed in cleanroom vacuum bags, cushioned with multi-density shock-absorbing EPE foam cells, and crated inside fumigated export timber frames with shock/tilt warning indicators for seamless delivery to YYZ.
Procurement & Technical Assurance
Frequently Asked Questions for Toronto & Canadian Buyers
Direct answers addressing import tariffs, optical tolerances, cleaning protocols, and technical validation parameters.
What is the standard adhesion test protocol used to ensure gold coatings do not peel from the quartz surface?
Every production batch destined for optical or sensor applications undergoes standard snap tape testing complying with MIL-M-13508C (utilizing Scotch 810 or 3M 5952 pressure-sensitive adhesive tape pressed firmly onto the gold film at 90° and peeled rapidly). Because we apply an in-situ RF plasma surface bombardment followed by a high-vacuum magnetron sputtered Titanium or Chromium seed layer (3-5 nm), our gold coatings exhibit cohesive interface bonding exceeding 30 MPa, resisting delamination even under continuous aqueous buffer flow or ultrasonic agitation.
How are Canadian import tariffs, customs brokerage, and CBSA documentation handled for shipments into Ontario?
Quartz laboratory ware and optical components entering Canada are classified under HS Code 7017.10 (Laboratory, hygienic or pharmaceutical glassware of fused quartz or other fused silica) or HS Code 9001.90 for optical elements. Shipments into the Greater Toronto Area typically arrive via air express through Toronto Pearson International Airport (YYZ). We provide complete Commercial Invoices, detailed Packing Lists with exact net/gross metric weights, and Certificates of Origin to facilitate immediate customs clearance through your designated customs broker (e.g., Livingston, Thompson Ahern, or courier-integrated brokers).
Can we order single-piece prototypes (MOQ = 1) for specialized research grants at U of T or McMaster?
Yes. We support university engineering labs, startups, and tier-1 industrial innovators with an agile 1-piece Minimum Order Quantity (MOQ) on custom engineered plates, crucibles, quartz boats, and gold-coated substrates. This allows research groups to empirically validate optical transmission, resonant frequency, or mechanical fit-up before committing capital to full production runs.
What surface cleaning protocols should be utilized to clean gold-coated quartz slides without destroying the film?
For regenerating gold surfaces, we strongly advise brief exposure (30 to 60 seconds) to mild ultraviolet-ozone (UV/O3) treatment or low-power oxygen/argon plasma (≤ 30 W). If wet chemical cleaning is required, absolute semiconductor-grade ethanol or isopropanol rinses followed by high-purity nitrogen drying are recommended. Extreme caution must be exercised with concentrated Piranha etch ($H_2SO_4:H_2O_2$): while safe for raw fused quartz, prolonged piranha immersion can undermine the ultra-thin titanium/chromium underlayer, leading to edge lifting of the gold film.
What is the typical fabrication and transit lead time to delivery in the Greater Toronto Area?
Standard custom quartz components (such as CNC milled plates, observation discs, and standard-sized tubes) ship within 7 to 10 working days from drawing sign-off. Specialty optical magnetron sputtering of gold coatings adds approximately 3 to 5 working days for cleanroom processing and spectrophotometer QC. Direct air express transit to addresses in Toronto, Mississauga, Markham, or Waterloo takes 4 to 6 business days via DHL Express, FedEx International Priority, or UPS Worldwide.
How does the thermal expansion of quartz compare with borosilicate glass during cyclical thermal shock?
Fused quartz features a coefficient of thermal expansion of roughly $5.5 \times 10^{-7} /^\circ\text{C}$, which is roughly five times lower than borosilicate glass 3.3 (approx. $33 \times 10^{-7} /^\circ\text{C}$). This gives quartz essentially near-zero sensitivity to acute thermal shock; a fused quartz plate or crucible can be heated past 1100°C and plunged directly into ice water without structural fracturing, making it the mandatory standard for high-temperature semiconductor diffusion and laser ablation cells.