35 results about "Niobium monoxide" patented technology

The present invention relates to high-purity niobium monoxide powder (NbO) produced by a process of combining a mixture of higher niobium oxides and niobium metal powder or granules; heating and reacting the compacted mixture under controlled atmosphere to achieve temperatures greater than about 1800° C., at which temperature the NbO is liquid; solidifying the liquid NbO to form a body of material; and fragmenting the body to form NbO particles suitable for application as e.g., capacitor anodes. The NbO product is unusually pure in composition and crystallography, highly dense, and can be used for capacitors and for other electronic applications. The method of production of the NbO is robust, does not require high-purity feedstock, and can reclaim value from waste streams associated with the processing of NbO electronic components.

The invention discloses a solid electrolyte tantalum-niobium composite capacitor and a preparation method thereof. The tantalum-niobium composite capacitor is prepared by mixing tantalum and niobium. The preparation method comprises the following steps: firstly, uniformly mixing tantalum power and niobium power or the tantalum power and pure columbium monoxide according to certain ratio, wherein the content of tantalum is 5-95 percent and the balance of niobium; pressing the mixture to form to obtain an anode block of compound metal; vacuum sintering to obtain an anode of the composite capacitor; electrochemically oxidizing the anode to form a medium film compounded by tantalum oxide and niobium oxide and using the medium film as the anode of the tantalum-niobium composite capacitor; and preparing the anode from solid manganese dioxide. The appearance of a product is similar to the appearance of the platy solid electrolyte tantalum-niobium composite capacitor. The preparation method comprises the working procedures of mixing, forming, sintering, energizing and enveloping the tantalum power and the niobium power or the columbium monoxide.

A nobium powder for capacitors, which contains from 0.05 to 20% by mass of niobium monoxide crystal and from 0.05 to 20% by mass of hexaniobium monoxide crystal; a sintered body thereof; and a capacitor fabricated from the sintered body as one part electrode, a dielectric material formed on the surface of the sintered body, and another part provided on the dielectric material. A capacitor manufactured from a sintered body of a niobium powder of the present invention is favored with good high-temperature characteristics.

MOSFET gate structures are provided comprising a niobium monoxide gate, overlying a gate dielectric. The niobium monoxide gate may have a low work function suitable for use as an NMOS gate.

A nobium powder for capacitors, which contains from 0.05 to 20% by mass of niobium monoxide crystal and from 0.05 to 20% by mass of hexaniobium monoxide crystal; a sintered body thereof; and a capacitor fabricated from the sintered body as one part electrode, a dielectric material formed on the surface of the sintered body, and another part provided on the dielectric material. A capacitor manufactured from a sintered body of a niobium powder of the present invention is favored with good high-temperature characteristics.

Disclosed are a niobium solid electrolytic capacitor capable of reducing leak current that may occur in high heat treatment in a reflow process and capable of preserving the capacity before and after heat treatment, and a method for producing it. The niobium solid electrolytic capacitor comprises an anode containing an oxide of niobium monoxide or niobium dioxide and a metal of niobium or a niobium alloy, a dielectric layer formed on the surface of the anode, and a cathode formed on the dielectric layer, wherein the dielectric layer contains fluorine.

The invention discloses a slice-typed niobium oxide solid electrolytic capacitor and a preparation method thereof; the capacitor comprises an epoxy resin encapsulation shell which is internally provided with a niobium monoxide capacitor substrate, a nickel-based tinning cathode eduction slice and a nickel-based tinning anode eduction slice; the niobium monoxide capacitor substrate is internally provided with an anode and the surface thereof is a cathode; the anode is internally provided with a Ta-wire eduction wire; the cathode of the niobium monoxide capacitor substrate is electrically connected with the nickel-based tinning cathode eduction slice; the Ta-wire anode eduction wire in the niobium monoxide capacitor substrate is welded on the nickel-based tinning anode eduction slice to form electric connection. The niobium oxide solid electrolytic capacitor has simple structure and convenient manufacture process; the prepared niobium oxide capacitor can be applied to various circuits such as switch power circuit for large surge voltage and current and the like; when accidental breakdown occurs, combustion or explosion does not occur; furthermore, continuous breakdown can be effectively avoided; compared with the Ta capacitor or pure Nb capacitor, the niobium oxide solid electrolytic capacitor is greatly improved on the reliability and safety.

A nanofiber mat comprises metal oxide nanoparticles distributed on surface of metal oxide nanofibers, wherein the nanofiber mat has a surface area at least 150 m2 / g, and the metal oxide is selected from titanium monoxide TiOx, wherein 0.65<x<1.25, niobium monoxide NbOx, wherein 0.982<x<1.008, vanadium (II) oxide VOx, wherein 0.79 <x <1.29, iron (II) oxide FexO, wherein 0.833<x<0.957, manganese (II) oxide MnxO, wherein 0.848<x<1.000, titanium suboxide, TiOnO2n-1, wherein n>1, molybdenum suboxide, MonO3n-1, wherein n>1, MonO3n-2, wherein n>1, and vanadium suboxide, VnO2n-1, wherein n>1. Cathodes, anodes and batteries are made using the nanofiber mat. Processes for producing the metal oxide nanofiber mat and an electrode including it are also provided.

The invention discloses a solid electrolyte tantalum-niobium composite capacitor and a preparation method thereof. The tantalum-niobium composite capacitor is prepared by mixing tantalum and niobium. The preparation method comprises the following steps: firstly, uniformly mixing tantalum power and niobium power or the tantalum power and pure columbium monoxide according to certain ratio, wherein the content of tantalum is 5-95 percent and the balance of niobium; pressing the mixture to form to obtain an anode block of compound metal; vacuum sintering to obtain an anode of the composite capacitor; electrochemically oxidizing the anode to form a medium film compounded by tantalum oxide and niobium oxide and using the medium film as the anode of the tantalum-niobium composite capacitor; and preparing the anode from solid manganese dioxide. The appearance of a product is similar to the appearance of the platy solid electrolyte tantalum-niobium composite capacitor. The preparation method comprises the working procedures of mixing, forming, sintering, energizing and enveloping the tantalum power and the niobium power or the columbium monoxide.

An object of the present invention is to provide a niobium monoxide able to realize large capacitance in a miniature sized capacitor. The invention relates to a niobium monoxide having a porous structure comprising particles, characterized in that the niobium monoxide has a full-width at half maximum of an X-ray diffraction peak corresponding to a (111) plane or an X-ray diffraction peak corresponding to a (200) plane of 0.21° to 1.0°. The niobium monoxide has a large specific surface area and porosity, and is especially suitable for use in a capacitor.

Te invention discloses a method for preparing a niobium monoxide and niobium powder mixture through plasma decomposition. According to the method for preparing the niobium monoxide and niobium powder mixture through plasma decomposition, niobium pentoxide is used as a raw material, high-temperature plasma decomposition is conducted on the niobium pentoxide, and then the niobium monoxide and niobium powder mixture is prepared. The method for preparing the niobium monoxide and niobium powder mixture through plasma decomposition comprise the specific steps that the niobium pentoxide is poured into a plasma gun, the decomposition action is conducted through the high temperature of a plasma flame, and then the niobium monoxide and niobium powder mixture is obtained, wherein the power is controlled to be in the range of 10-100 kw; and the niobium monoxide and niobium powder mixture obtained through decomposition falls into a cooling device. The method for preparing the niobium monoxide and niobium powder mixture through plasma decomposition achieves simple and rapid reparation of the niobium monoxide and niobium powder mixture and is low in energy consumption and free of pollution. Besides, the particle shape of the obtained niobium monoxide and niobium powder mixture is sphere, the sphere particle shape is an ideal particle shape for manufacturing of a capacitor, and the niobium monoxide and niobium powder mixture is low in cost and good in quality. The method for preparing the niobium monoxide and niobium powder mixture through plasma decomposition has important significance in the aspects of replacing tantalum with niobium, replacing a tantalum capacitor and an aluminum capacitor with the niobium capacitor, manufacturing of a supercapacitor and the like.