We offer all common sizes of MgO up to 2" diameter. Please get in touch here if you would like a quotation for another size.
- Commonly used as substrate for: Fe2O3, Fe3O4, BaxSr1-xTiO3, KNbO3, SrRuO3, ZnO, MgFe2O4, WO3, YBCO, NiO and much more
- Surface Roughness: Ra <0.2nm (measured 5x5 µm AFM scan)
- Optically transparent >85% for 0.5 mm thickness for wavelengths above 300 nm
Single crystal MgO substrates are a staple of thin film labs for supporting high quality oxide (and metal) epitaxial thin film growth including semiconducting, superconducting, dielectric, ferroelectric, and ferromagnetic oxides. MgO crystals grow nicely with minimal defects meaning it is available up to 2 inch diameter and as a high hardness material can be polished with near atomic-scale roughness (rms <0.2 nm).
Due to its high transparency (even at 0.5 mm thick >85%) it is often used for optical experiments to investigate the film on top, in which case select the double side polished if doing these measurements in transmission mode. MgO can be used to make high-temperature superconducting microwave filters which require large surface area and other devices required for mobile communication equipment.
Because MgO is naturally a hygroscopic material, our MgO substrates arrive clean and vacuum packed (as with all our substrates) and should only be used directly out of the packaging and after deposition should be kept in a desiccator.
If you have any questions please get in touch here.
| LINEAR FORMULA: | MgO |
| PURITY: | >99.99% |
| CRYSTAL ORIENTATION: | (100), (110) & (111) |
| GROWTH METHOD: | Special Arc Melting |
| CRYSTAL STRUCTURE: | Cubic |
| LATTICE CONSTANT: | a = 4.216 Å |
| MELTING POINT (°C): | 2800 |
| THERMAL EXPANSION COEFFICIENT (/K): | 11.2 x 10-6 |
| HARDNESS: | 5.5 |
| MOLAR MASS (G/MOL): | 40.304 |
| DENSITY (G/CM3): | 3.58 |
| REFRACTIVE INDEX: | 1.736 (at 590 nm) |
| DIELECTRIC CONSTANTS: | 9.65 |
| 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 |
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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.
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.
- Credit Card: Visa, MasterCard, Discover, American Express, JCB, Visa Electron.
- Crystal Substrates offers a Fast Checkout option, allowing you to securely save your credit card details so that you don't have to re-enter them for future substrate purchases.
- 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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