5 PACK

Silicon Dioxide (SiO2) Single Crystal Substrates (5pack)

$118.00
(5 Pack)

Price per substrate = $23.60 ea

  • Fast Worldwide Delivery

  • High Quality Substrates

AVAILABILITY: Delivery ~3 weeks

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MATERIAL INFORMATION
MATERIAL PROPERTIES
XRD ANALYSIS
DELIVERY
FAQS
MATERIAL INFORMATION

α-quartz, SiO2 

  • Name: Single Crystal Silicon dioxide (SiO2), α-quartz
  • Lattice parameter:a=4.914 Å, c=5.405 Å 
  • Crystal Structure: Trigonal
  • Commonly used as substrate for: SiO2, GeO2, TiO2, ZnO2, GaPO4
  • Surface Roughness: Ra <0.5 nm (measured 5x5 µm AFM scan)
  • Available Dimensions: 5x5 mm to 2 inch diameter and customized
  • Comes as X-cut (11-20), Y-cut (10-10) (90 degrees to X-cut), Z-cut Z-cut  (0001) 
  • Single or double side polished
  • Next day delivery                     

 SiO2 has a trigonal structure (considered part of hexagonal structure therefore used 4 indices notation.

SiO2 has a trigonal structure (considered part of hexagonal structure therefore used 4 indices notation.

There are several polymorphs of silicon dioxide (SiO2) and there are a few types of silicon dioxide important for thin film applications. This can be in thin films or substrates, amorphous or crystalline. Here, we are referring to the crystalline form of SiO2 also known as  α-quartz, not to be confused with fused quartz which is the amorphous form of SiO2.

At normal pressure trigonal quartz (α-quartz) will transform into hexagonal β-quartz at 573°C and later to cubic β-cristobalite at 1050°C. At 1705°C β-cristobalite finally melts. So if using quartz as a substrate it is advisable to stay under the β-quartz transition at 573°C.

Quartz single-crystal substrates are transparent and have excellent thermo-mechanical properties, low coefficient of thermal expansion, excellent mechanical and piezoelectric properties. Single-crystal quartz substrates are used in electronics, precision optics, laser technology, optical communications, X-ray optics and pressure sensors.

As a well studied and well-known material, SiO2 is often used to grow thin films for optical experiments however it does also support epitaxial growth of some films.Quartz single crystals are also sometimes used as targets for pulsed laser deposition to grow a dielectric layer.

 

MATERIAL PROPERTIES

LINEAR FORMULA:
SiO2
PURITY: >99.99%
CRYSTAL ORIENTATION:  (100), (110) & (111)
GROWTH METHOD: Hydrothermal method
CRYSTAL STRUCTURE: Hexagonal
LATTICE CONSTANT: a= 4.914 Å
MELTING POINT  (°C): 1610
THERMAL EXPANSION COEFFICIENT (/K): perpendicular to Z axis: 13.71

parallel to Z axis: 7.48
HARDNESS: 7
MOLAR MASS (G/MOL):
60.08
DENSITY (G/CM3): 2.684 g/cm3
REFRACTIVE INDEX: 1.544
DIELECTRIC CONSTANTS:
3.7 - 3.9
CHEMICAL STABILITY: 
SIZES: 5x5mm, 10x10 mm, 20x20 mm, 1 inch diameter, 2 inch diameter, 60 mm diameter 3 inch MgO wafers and 4 inch 
TYPICAL THICKNESS: 0.5mm
SIZE TOLERANCES:  +/- 0.1mm
THICKNESS TOLERANCES:  +/- 0.015mm
ORIENTATION PRECISION: +/-0.5 degree
POLISHING OPTIONS: SINGLE SIDED (1SP) OR BOTH SIDES POLISHED (2SP)
ROUGHNESS RA: <0.5nm

 

 

XRD ANALYSIS

coming soon.

DELIVERY

How long does it take for you to ship out after purchase? In-Stock Substrates are held in our US warehouse and we aim to have substrates shipped out within 24-48 hours.

Pre-Order Substrates are manufactured and delivered in 3-4 weeks. 

How much is shipping? All substrates are shipped free of charge within the USA. This shipping takes approx 4-5 days to arrive once shipped. 

Expedited delivery? Faster delivery options are available. Below are some indicative prices. To get the cost for your package and location, just add your address at check out and select the shipping option you want to check.

  • USA FedEx 2 day delivery: typically $25 USD
  • USA FedEx Overnight Delivery: typically $65USD. 
  • Canada FedEx International Priority: typically $25 USD.

    Europe and UK Delivery? Approx cost for delivery is 50 Euros. Shipping costs will be calculated at check-out based on your address or please complete the quote form and we will email you the price. VAT and customs charges are payable by the buyer. 

    Rest of Worldwide Shipping? Shipping costs to the rest of the World, will be calculated at check-out. Please be aware that delivery times and tracking information vary for each country. Customs charges may apply if shipping outside of the US and are payable by the buyer.

      FAQS

      How can I place an order? The quickest way to get your item is to buy through the website – the order is automatically picked up in our system and in stock items ships out asap.

      We can accept purchase orders for established universities and companies and are happy to work with your institutes payment systems if required (although please note we are a small company so would prefer pre-payment via our website for small or one-off orders). 

      We have flexible payment options and can give you a quotation in any of the following currencies (USD $, CAD $, GBP £, EUROS €  AUD $).

      You can download a copy of our W8 form here.

      What payment options do you provide? Crystal Substrates accepts the following payment methods:

        • Bank Transfer into USA bank account. 
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        • PayPal: Shop easily online without having to enter your credit card details on the website.Your account will be charged once the order is completed.
        • Sorry we do not accept payment with check.

      Do you send substrates to Europe? Yes, we have many long term customers buy from all over Europe including France, UK, Germany, Italy, Norway, Netherlands. Please buy through the website or get in touch if you need a specific substrate. 

      We believe we have the cheapest and best quality products in the USA. If you find another US company with a lesser price (including delivery) we would be happy to price match. 

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