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Metal nitride compound powder substrate for capacitor anodic oxide film and the substrate interface therebetween, characterized, relative to un-nitrided analogs, by reduced temperature bias and frequency dependencies of capacitance, the substrate-anodic oxide interface being substantially insensitiv

Metal nitride compound powder substrate for capacitor anodic oxide film and the substrate interface therebetween, characterized, relative to un-nitrided analogs, by reduced temperature bias and frequency dependencies of capacitance, the substrate-anodic oxide interface being substantially insensitive to heating compared to the un-nitrided analog.

대표청구항 ▼

1. Capacitor electrode material comprising a substrate metal nitride compound with a film of oxide of the metal at the surface of substrate, and an interface therebetween, the substrate and the oxide film having a thermodynamically stable substrate-oxide film interface that as a whole when constr

1. Capacitor electrode material comprising a substrate metal nitride compound with a film of oxide of the metal at the surface of substrate, and an interface therebetween, the substrate and the oxide film having a thermodynamically stable substrate-oxide film interface that as a whole when constructed, heat treated, and tested as a capacitor has low bias dependence of capacitance, low temperature dependence of capacitance and low frequency dependence of capacitance, all relative to capacitors based on an analog metal (un-nitrided) substrate that is of similar size, morphology and construction and subjected to similar heat treatment conditions. 2. The powder of claim 1 wherein the refractory metal nitride is selected from the group consisting of substantially (atomic basis) TaN, Ta2N, and NbN. 3. An electrolytic capacitor anode comprising the powder of claim 2. 4. A wet electrolytic capacitor comprising the anode of claim 3. 5. A solid electrolyte capacitor comprising the anode of claim 3. 6. Material as set forth in claim 1 in powder form. 7. Material as set forth in claim 1 selected from the group consisting of tantalum nitride and niobium nitride compounds and mixtures thereof. 8. Material as set forth in claim 7 in powder form. 9. A capacitor anode comprising the material of any one of claims 1, 6, 7, or 8. 10. A capacitor comprising the anode of claim 9. 11. A refractory metal nitride powder suitable as a substrate for an electrolytic capacitor comprising a refractory metal powder wherein the powder has an ignition energy that is substantially increased as compared to an un-nitrided metal analog and wherein the powder has reduced flammability and the powder provides a finished capacitor containing the powder reduced ignition failures.