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Method for treating titanium objects with a surface layer of mixed tantalum and titanium oxides

一种氧化物、物体的技术，应用在薄料处理、涂层、运输和包装等方向，能够解决增大局部故障的风险等问题

Inactive Publication Date: 2009-07-22
TANTALINE CVD HLDG APS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of electrode operation, this irregularity means that the current varies across the surface (where the microcells are formed) and there is an increased risk of local failure, the same is known for tantalum-free electrodes

Method used

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  • Method for treating titanium objects with a surface layer of mixed tantalum and titanium oxides
  • Method for treating titanium objects with a surface layer of mixed tantalum and titanium oxides
  • Method for treating titanium objects with a surface layer of mixed tantalum and titanium oxides

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Embodiment Construction

[0038] figure 1 A simple schematic diagram of the invention is shown in which an electrically conductive object (3) is located in a reaction chamber (2) of a furnace (1). The object (3) has at least one titanium surface. In a preferred embodiment of the invention, the substrate reactive material (4) is TaCl provided in some solid state, preferably as a powder 5 .

[0039] The main process of the present invention is the reaction between tantalum halide (tantalum with a degree of oxidation higher than 0) and titanium metal (with a degree of oxidation of 0). An example is that at a suitable process temperature (target temperature), the following reactions can then be carried out

[0040] 4TaCl 5 (s)+5Ti(s)->4Ta(0)+5TiCl 4 (g).

[0041] The target temperature is preferably selected between 880-930 degrees Celsius, or preferably 900 degrees Celsius.

[0042] Depending on factors like object (3) size and target temperature, the heating lasts for several minutes, or possibly ev...

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Abstract

This invention introduces a method for treating a surface of an electrically conductive object with a refractory metal. In one embodiment, the refractory metal is tantalum and the object is a titanium substrate. A surface layer of mixed tantalum and titanium oxides is created by first heating the object and tantalum chloride in a reaction chamber and subsequently heat treating the object in an oxygen containing environment. The electrically conductive object can in a non-limiting way be DSA solutions (Dimensionally Stable Anodes), fuel cells or connector plates.

Description

technical field [0001] The present invention relates to a method for treating the surface of an electrically conductive titanium object with a surface layer of mixed tantalum and titanium oxides by first heating the object and tantalum chloride in a reaction chamber and subsequently heat-treating the object in an oxygen-containing atmosphere method. In a non-limiting manner, the conductive object may be a DSA solution (dimensionally stable anode), a fuel cell or a connector plate. Background technique [0002] Traditionally, the manufacture of DSA is based on a substrate with a catalyst layer on it, like US 3,929,608, which describes electrodes comprising a conductive metal core of titanium or titanium alloy and a catalytic coating on the titanium metal surface, wherein the coating consists of At least one substance selected from the group consisting of group metals and their oxides. Another example is US 5,503,663, where a compound of at least two platinum group metals or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/00C25B11/04C22C1/00
CPCC23C10/34C22C1/00C23C10/28C23C10/08Y10T428/12806
Inventor 博·吉莱斯伯格索伦·埃里克森
Owner TANTALINE CVD HLDG APS
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