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High-purity and high-activity nickel oxide-based powder, preparation method and application

A technology based on nickel oxide and nickel oxide powder, applied in the direction of nickel oxide/nickel hydroxide, etc., which can solve the problems of easy pollution of the environment, inability to further refine the powder, and inability to accurately control the particle size of the powder

Pending Publication Date: 2021-02-19
BEIJING ORIENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of technology involves the use of a large amount of strong acid, and it is easy to produce a large amount of waste liquid containing heavy metal elements such as nickel and strong acid ions such as Cl, which is easy to pollute the environment. The powder cannot be further refined, so it is difficult to obtain a powder with a smaller particle size by using the existing technology, and it is not easy to control the particle size of the powder as required

Method used

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  • High-purity and high-activity nickel oxide-based powder, preparation method and application
  • High-purity and high-activity nickel oxide-based powder, preparation method and application
  • High-purity and high-activity nickel oxide-based powder, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1: (adopt hot isostatic pressing method to prepare)

[0090] 1. Preparation of nickel oxide powder:

[0091] (a) Pass high-purity nickel vapor into oxygen at 1650°C to form high-nickel oxide;

[0092] (b) mixing high-nickel oxide and high-purity graphite reducing agent and roasting at 700°C to obtain a nickel oxide block;

[0093] (c) jet pulverization obtains nickel oxide coarse powder;

[0094] (d) The nickel oxide coarse powder is subjected to wet ball milling: the ball-to-material ratio is 3:1, the average diameter of the balls is 5 mm, the volume of the balls and the slurry accounts for 50% of the volume of the grinding chamber, and the ball mills for 15 hours to obtain the oxidized nickel oxide powder. Nickel powder; the purity of the obtained nickel oxide powder is 99.99%, and the micrograph of the nickel oxide powder is figure 1 , the XRD pattern of nickel oxide powder is figure 2 , the PSD picture of nickel oxide powder is image 3 , it can b...

Embodiment 2

[0110] Embodiment 2: (adopt hot isostatic pressing method to prepare)

[0111] The difference between this example and Example 1 is that the dopant source components in the raw material preparation step of A are Li:Na:Zn:W=1:0.5:0.8:1.2 in terms of molar ratio;

[0112] The obtained ceramic target has an average grain size of 4 μm, a doped phase size of 200 nm, a bulk electrical conductivity of 25 S / cm, and a relative density of 99.1% measured by the drainage method.

Embodiment 3

[0113] Embodiment 3: (adopt hot isostatic pressing method to prepare)

[0114] 1. Preparation of nickel oxide powder:

[0115] (a) Pass high-purity nickel vapor into oxygen at 1600°C to form high-nickel oxide;

[0116] (b) roasting high nickel oxide in a hydrogen atmosphere at 1000°C to obtain a nickel oxide block;

[0117] (c) jet pulverization obtains nickel oxide coarse powder;

[0118] (d) The nickel oxide coarse powder is subjected to wet ball milling: the ball-to-material ratio is 2:1, the average diameter of the balls is 0.3mm, the volume of the balls and the slurry accounts for 2 / 3 of the volume of the grinding chamber, and the ball mills for 20 hours to obtain the Described nickel oxide powder; The purity of the nickel oxide powder that obtains is 99.995%, and the micrograph of the nickel oxide powder that present embodiment prepares is Figure 5 , the PSD picture is Image 6 , the average particle size of the nickel oxide powder prepared in this example is 500n...

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Abstract

The invention relates to high-purity and high-activity nickel oxide-based powder, a preparation method and application. The nickel oxide-based powder is mixed powder containing nickel oxide powder anddoping source powder, wherein the total mass fraction of doping source element in the mixed powder is not higher than 10%, the doping source element is selected from one or more of 0-6% of Li, 0-0.3%of Na, 0-1.0% of Mg, 0-0.1% of Al, 0-0.1% of Si, 0-0.15% of K, 0-12% of Zn, 0-1.5% of Zr, 0-1.2% of Mn, 0-10% of Cu, 0-1.2% of Cr, 0-0.3% of V, 0-10% of W and 0-2.5% of Ti, the purity of the nickel oxide powder and the doping source powder is higher than 99.99%, the average particle size is 500 nm-2 [mu]m, and the D50 particle size is 50-800 nm. According to the invention, the powder is high in purity, and the particle size reaches the nanoscale, so that the activity of the powder is improved, and the conductivity of ceramic prepared from the powder is improved.

Description

technical field [0001] The invention relates to a nickel oxide-based powder, in particular to a high-purity and high-activity nickel oxide-based mixed powder, a preparation method and an application. Background technique [0002] Nickel oxide is a P-type transition group wide bandgap semiconductor material with 3d outermost electronic structure, which has excellent chemical stability and some special photoelectric properties. At present, nickel oxide thin films have been found to have great application potential, including P-type transparent conductive thin films, electrochromic thin films, catalytic thin films, magnetic thin films, etc. [0003] In order to obtain the above-mentioned thin films, it has great application prospects to select nickel oxide-based ceramic targets and use PVD coating techniques such as magnetron sputtering to prepare them. Nickel oxide-based ceramics can be prepared by using nickel oxide-based powders through conventional ceramic molding techniqu...

Claims

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Application Information

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IPC IPC(8): C01G53/04C04B35/01C04B35/622C04B35/645
CPCC01G53/04C04B35/01C04B35/622C04B35/6455C01P2002/72C01P2004/01C01P2006/80C04B2235/6562C04B2235/6567C04B2235/77C04B2235/786
Inventor 高明张虎张花蕊杨本润
Owner BEIJING ORIENT
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