5 PACK

Magnesium Aluminate (MgAl2O4) Crystal Substrates (5pack)

£169.00
(5 Pack)

Price per substrate = £33.80 ea

  • Fast Worldwide Delivery

  • High Quality Substrates

AVAILABILITY: In Stock - Delivery straight away

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MATERIAL INFORMATION
MATERIAL PROPERTIES
XRD ANALYSIS
DELIVERY
FAQS
MATERIAL INFORMATION

  • Name: Spinel, MgAlO4
  • Lattice parameter:a=8.0898 Å (½ a - 4.0499 Å)
  • Crystal Structure: Cubic, Spinel
  • Commonly used as substrate for:  spinels (e.g. CoCr2O4, CoFe2O4, NiFe2O4, CuCr2O4, SnFe2O4, ZnGa2O4)Perovskites (e.g. BSTO), YBCO, VOx & III-V nitride films
  • Surface Roughness: Ra <0.5 nm (measured 5x5 µm AFM scan)
  • Available Dimensions: 5x5 mm to 2 inch diameter and customized
  • Single or double side polished
  • Next day delivery

Magnesium aluminate (MgAl2O4) single crystals are commonly used to support the growth of other spinel films, however they are also used to make some perovskites such as BSTO and YBCO as well as III-V nitride films

 MgAl2O4 is highly transparent in the visible spectrum (>85% above 300 nm). If you are planning to us in transmission experiments then please get the double sided option above. Spinel is a very hard material with a Mohs hardness of 7.5-8 with no cleavage planes so can be difficult to cleave on the benchtop with straight clean edges. We suggest to cut with a diamond saw or have us cut into the sizes you need.

The Spinel Group

Whilst here we are referring to the material which gives the spinel groups its name, it is worth mentioning here the general class of spinel materials as these are the films which are often grown on MgAl2O4 substrates. Spinel group materials have general formulation AB2X4, with the X anions (typically chalcogens, like oxygen and sulphur) arranged in a cubic close-packed lattice and the cations A and B occupying some or all of the octahedral and tetrahedral sites in the lattice. Although the charges of A and B in the prototypical spinel structure are +2 and +3, respectively (A=2+, B= 3+, X=2−), other combinations incorporating divalent, trivalent, or tetravalent cations are also possible. The anion is typically oxygen.

MATERIAL PROPERTIES

LINEAR FORMULA:
MgAl ₂O ₄
PURITY: >99.99%
CRYSTAL ORIENTATION:  (100), (110) & (111)
GROWTH METHOD: Czochralski
CRYSTAL STRUCTURE: Cubic
LATTICE CONSTANT:
a = 8.085Å
MELTING POINT  (°C): 2130
THERMAL EXPANSION COEFFICIENT (x10-6/ K): 7.45
HARDNESS (Mohs): 8
MOLAR MASS (G/MOL):
DENSITY (G/CM3): 3.64
REFRACTIVE INDEX:
DIELECTRIC CONSTANTS:
CHEMICAL STABILITY: 
SIZES: 5x5mm & 10x10 mm
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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