Claims
- 1. A process for making high grade electrolytic capacitors from a refractory metal material comprising:mixing the refractory metal material with a refractory metal nitride material to form a mixture at a refractory metal nitride concentration of at least 25 percent, by weight, forming pellets from said mixture at a temperature capable of sintering the mixture, subjecting said sintered pellets to anodization, and forming capacitors from said anodized pellets.
- 2. The process of claim 1 wherein the refractory metal is selected from the group consisting of Ta and Nb.
- 3. A powder suitable for use as a substrate material for electrolytic capacitors comprising a refractory metal and a refractory metal nitride mixture wherein the powder is sintered at an appropriate temperature and results in a pellet with an open pore structure, wherein the powder has a refractory metal nitride concentration of at least 25 percent, by weight.
- 4. The powder of claim 3 wherein the refractory metal is selected from the group consisting of Ta and Nb.
- 5. An electrolytic capacitor anode comprising the powder of claim 4.
- 6. A wet electrolytic capacitor comprising the anode of claim 5.
- 7. A solid electrolytic capacitor comprising the anode of claim 5.
- 8. A process for making high grade electrolytic capacitors from a refractory metal material comprising:mixing the refractory metal with a refractory metal nitride material to form a mixture, forming pellets from said mixture at a temperature capable of sintering the mixture, subjecting said sintered pellets to anodization, and forming capacitors from said anodized pellets, wherein the refractory metal concentration ranges from about 5 percent to about 70 percent based on weight of the mixture.
- 9. A process for making high grade electrolytic capacitors from a refractory metal material comprising:mixing the refractory metal with a refractory metal nitride material to form a mixture, forming pellets from said mixture at a temperature capable of sintering the mixture, subjecting said sintered pellets to anodization, and forming capacitors from said anodized pellets, wherein the refractory metal is selected from the group consisting of Ta and Nb, and the refractory metal concentration ranges from about 5 percent to about 70 percent based on weight of the mixture.
- 10. A process for making high grade electrolytic capacitors from a refractory metal material comprising:mixing the refractory metal with a refractory metal nitride material to form a mixture including a concentration of at least 25 percent of refractory metal based on weight of the mixture, forming pellets from said mixture at a temperature capable of sintering the mixture, subjecting said sintered pellets to anodization, and forming capacitors from said anodized pellets, wherein the refractory metal is selected from the group consisting of Ta and Nb, and the refractory metal concentration ranges from about 25 percent to about 50 percent based on weight of the mixture.
Parent Case Info
This application is a Divisional of U.S. Ser. No. 09/695,512, filed Oct. 24, 2000 U.S. Pat. No. 6,554,884.
US Referenced Citations (13)
Foreign Referenced Citations (3)
Number |
Date |
Country |
53-49254 |
May 1978 |
JP |
0049633 |
Aug 2000 |
WO |
0234436 |
May 2002 |
WO |