LUMINESCENT DIAMOND MATERIAL AND METHOD OF PRODUCING THE SAME

• US 20190322930A1
• Filed: 04/22/2019
• Published: 10/24/2019
• Est. Priority Date: 04/24/2018
• Status: Active Application

• Current Assignee: Diamond Innovations Incorporated (Sandvik AB)
• Original Assignee: Diamond Innovations Incorporated (Sandvik AB)
• Inventors: DALIS, Adamos, VAGARALI, Suresh
• Application Number:
  US16/390,537
• Publication Number:
  US 20190322930A1
• Time in Patent Office: Days
• CPC Class Codes: B01J 2203/061 Graphite
• CPC Class Codes: B01J 2203/0655 Diamond
• CPC Class Codes: B01J 23/34 Manganese
• CPC Class Codes: B01J 23/74 Iron group metals
• CPC Class Codes: B01J 3/065 Presses for the formation of diamonds or boronitrides
• CPC Class Codes: C01B 32/25 Diamond
• CPC Class Codes: C01B 32/26 Preparation by using ultra-high pressure B01J3/06; by crystal growth C30B29/04
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2004/62 Submicrometer sized, i.e. from 0.1-1 micrometer
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C01P 2006/60 Optical properties, e.g. expressed in CIELAB-values
• CPC Class Codes: C09K 11/65 containing carbon in organic compounds C09K11/06
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H05B 33/18 characterised by the nature or concentration of the activator

Abstract

Provided are a luminescent diamond material and method of producing the same. The method may include the steps of providing a catalyst selected from one or more of the group of cobalt, iron, manganese and nickel; providing an enhancer selected from one or more of the group of boron, germanium, phosphorous, silicon and tin; providing graphite; blending the catalyst, enhancer and graphite to form a homogenized blend; and subjecting the homogenized blend to a high temperature, high pressure process to form a luminescent diamond material having a plurality of diamond particles having a plurality of defect centers, wherein the luminescent diamond material luminesces at a wavelength of about 700 nm to about 950 nm and energy of about 1.77 eV to about 1.30 eV.

Claims

1. A luminescent diamond material comprising a plurality of diamond particles having at least one defect center that luminesces at a wavelength of about 700 nm to about 950 nm and energy of about 1.77 eV to about 1.30 eV.

2. The luminescent diamond material of claim 1, wherein the at least one defect center luminesces at a wavelength of about 800 nm to about 900 nm and energy of about 1.55 eV to about 1.38 eV.

3. The luminescent diamond material of claim 1, wherein the at least one defect center luminesces at a wavelength of about 775 nm to about 925 nm and energy of about 1.60 eV to about 1.34 eV.

4. The luminescent diamond material of claim 1, wherein the at least one defect center that luminesces at a peak wavelength of about 880 nm to about 890 nm and energy of about 1.41 eV to about 1.39 eV.

5. The luminescent diamond material of claim 1, wherein the at least one defect center photoluminesces when excited with a visible, ultraviolet, or infrared light.

6. The luminescent diamond material of claim 1, further comprising a luminescent enhancer.

7. The luminescent diamond material of claim 6, wherein the luminescent enhancer is selected from at least one of boron, germanium, phosphorus, silicon and tin.

8. The luminescent diamond material of claim 6, wherein the at least one defect center is selected from at least one of cobalt, germanium, nickel, nitrogen and silicon.

9. The luminescent diamond material of claim 1, wherein the diamond particles have a size less than about 100 nm.

10. The luminescent diamond material of claim 1, wherein the diamond particles have a size of about 1 nm to about 20 nm.

11. The luminescent diamond material of claim 1, wherein the diamond particles have a size of about 20 nm to about 100 nm.

12. The luminescent diamond material of claim 1, wherein the diamond particles have a size of about 0.1 μ

m to about 1 μ

m.

13. The luminescent diamond material of claim 1, wherein the diamond particles have a size of about 500 nm to about 30 μ

m.

14. The luminescent diamond material of claim 1, wherein the diamond particles have a size of about 10 μ

m to about 100 μ

m.

15. The luminescent diamond material of claim 1, wherein the diamond particles have a plurality of defect centers, wherein the concentration of the defect centers is more than about 8 ppm.

16. The luminescent diamond material of claim 1, wherein the material is made from a composition of material that includes a catalyst composition selected from one or more of the group of cobalt, iron, manganese and nickel, and an enhancer selected from one or more of the group of boron, germanium, phosphorous, silicon and tin.

17. The luminescent diamond material of claim 1, wherein the material is luminescent nanodiamond.

18. A luminescent diamond material comprising a plurality of diamond particles having a first defect center that luminesces at a peak wavelength of about 880 nm to about 890 nm and energy of about 1.41 eV to about 1.39 eV and a second defect center that luminesces at peak wavelength of about 510 nm to about 520 nm and energy of about 2.43 eV to about 2.38 eV.

19. A method of producing a luminescent diamond material comprising the steps of:

providing a catalyst selected from one or more of the group of cobalt, iron, manganese and nickel;

providing an enhancer selected from one or more of the group of boron, germanium, phosphorous, silicon and tin;

providing graphite;

blending the catalyst, enhancer, and graphite to form a homogenized blend and pressing the homogenized blend into a solid compact; and

subjecting the solid compact to a high temperature, high pressure process to form a luminescent diamond material having a plurality of diamond particles having a plurality of defect centers, wherein the luminescent diamond material luminesces at about 700 nm to about 950 nm and energy of about 1.77 eV to about 1.30 eV.

20. The method of claim 19, wherein the plurality of defect centers luminesces at a wavelength of about 800 nm to about 900 nm and energy of about 1.55 eV to about 1.38 eV.

21. The method of claim 19, wherein the plurality of defect centers luminesces at a wavelength of about 775 nm to about 925 nm and energy of about 1.60 eV to about 1.34 eV.

22. The method of claim 19, wherein the plurality of defect centers photoluminesces when excited with a ultraviolet, visible or infrared light

23. The method of claim 19, wherein the diamond particles have a size less than about 100 nm.

24. The method of claim 19, wherein the diamond particles have a size of about 1 nm to about 20 nm.

25. The method of claim 19, wherein the diamond particles have a size of about 20 nm to about 100 nm.

26. The method of claim 19, wherein the diamond particles have a size of about 0.1 μ

m to about 1 μ

m.

27. The method of claim 19, wherein the diamond particles have a size of about 500 nm to about 30 μ

m.

28. The method of claim 19, wherein the diamond particles have a size of about 10 μ

m to 100 μ

m.

29. The method of claim 19, wherein the concentration of the defect centers is more than about 8 ppm.

30. The method of claim 19, wherein the catalyst, enhancer, and graphite are powders and the step of blending comprises blending the powders together to form a homogenized powder blend.

31. The method of claim 30, wherein the blended powder is pressed into a solid compact.

32. The method of claim 30, wherein the solid compact is subjected to a pressure of about 4.5 GPa to about 8 GPa and a temperature of about 1200°

C. to about 2300°

C.