Typical dimensions of the mini and maxi diamond anvils are shown in the table below.
1 mm diameter
1.25 mm diameter
8 mm diameter
|Diamond Type Ia
||~2×10³ ppm of nitrogen – yellow
|Diamond Type IIac
||~1 ppm of nitrogen – white to light brown
Almax easyLab is committed to its policy of continuous improvement. Specifications may change without notice. easyLab and Diacell are registered trademarks of Almax easyLab.
Almax easyLab can select its diamonds for low fluorescence. Standard measurements include laser excitation at 532 nm and covers fluorescence background in the range of 542 to 608 nm (Raman shifts between 1000 and 3000 cm-1). Measurements for different wavelength ranges can be made available on request. In special cases customers can select their own diamonds for low fluorescence using their own measurement set-up.
Almax easyLab classifies its diamonds with respect to fluorescence according to the following criteria:
- Type Ia UV low fluorescence – Checked with a UV lamp
- Type Ia Raman low fluorescence – The intensity of the two-phonon Raman transition at 2664 cm-1 is at least 1.25 times the intensity of the background fluorescence of diamond
- Type Ia Raman ultra-low fluorescence – The intensity of the two-phonon Raman transition at 2664 cm-1 is at least 2 times the intensity of the background fluorescence of diamond
- Type IIac Raman ultra-low fluorescence
All diamonds to be used for anvil manufacture are examined under a polarising microscope for birefringence. Diamonds with significant birefringence discontinuity, typical of inclusions, etc. are rejected. In addition diamonds can be selected for ultralow birefringence. Total birefringence is measured using crossed polarisers, a waveplate and matched to specifications. Normally:
- Low birefringence <0.0001
- Ultra low birefringence <0.00005
Mini diamond anvils for X-ray Raman scattering spectroscopy HP experiments
Almax easyLab supplies a lot of miniature Boehler-Almax diamond anvils for this inelastic scattering method that uses hard X-rays of the order of 10 keV to measure energy-loss spectra at absorption edges of light elements (Si, Mg, O etc.) with an energy resolution below 1 eV. These conical diamonds have diameters down to 1.00 mm and thicknesses down to 0.50 mm which allow pressure generation up to 70 GPa often – but not exclusively – in conjunction with PCD diamond seats (only 1 size available: diameter 13.65 mm and thickness of 4.00 mm). This set-up significantly enhances the signal-to-noise ratio of this XRS technique.
Mini diamond anvils for dynamic HP experiments
Almax easyLab supplies a lot of premounted mini Boehler-Almax diamond anvils and windows for dynamic shock wave high pressure. These conical diamonds have diameters down to 1.25 mm and thicknesses down to 0.25 mm.
Maxi synthetic CVD diamond anvils for neutron HP experiments
Almax easyLab is supplying some very large diamond anvils polished from synthetic type IIa CVD diamond. Diameters up to 10.00 mm and thickness up to 5.00 mm are available these days. The material is clean from any inclusions or cracks, but there is still some evenly distributed birefringence present.
Almax easyLab offers four types of WC seats which are represented below. At the time of ordering, you will be able to specify the key dimensions (D, H, T, S, A).
Boehler-Almax anvils are glued into their carbide seats. The gluing procedure can be received upon simple request or downloaded from our website. Open the Mountinginstructions03, or open the following You Tube 3 minute video clip. We can supply you with the appropriated gluiing jig.
|Cylindrical with top taper
||Tapered with Top Taper
We have compiled a series of technical documents (brochures, articles, technical drawings, …) which you might find useful to help you understand this product better.
2017 – Millot, M. et al. – Experimental evidence for superionic water ice using shock compression
2017 – Petitgirard, S. et al. – Miniature diamond anvils for X-ray Raman scattering spectroscopy experiments at high pressure
Examples of typical requests for quote:
Diamond anvil, type Ia, Boehler-Almax design, 16-sided, diameter 1.00 mm, Ht=0.25+0.10+24.5°, table of 0.7113 mm (according to Design_aug2016_1), culet of 0.10 mm, bevels up to 0.30 mm at 8° (100)-oriented
- Article nr.: P01942
- Quantity: 4 anvils
Diamond anvil, type Ia, Boehler-Almax design, diameter 1.25 mm, total height of 0.390 mm, culet 0.70 mm, bottom angle 18°, Htc=0.30+0+0.09, T=0.90 mm, (100)-oriented, mounted in a carbide seat for Boehler-Almax design anvil, according to partnumber [P01287], diameter 16.00 mm, height 3.85 mm, aperture 110°
- Article nr.: S1
- Quantity: 6 anvils
Diamond anvil, type IIa (10 – 50 ppm of N content), single crystal optical grade, lightbrown, diameter 8.00 mm, table of 6.00 mm, height 3.00 mm, Htc=1.235×51°+0.30+1.465×55.68° (100)-oriented
- Article nr.: S1
- Quantity: 2 anvils