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Lithium nitride particles and preparation method and preparation equipment thereof

A technology of lithium nitride and particles, which is applied in the field of lithium nitride particles and its preparation, can solve the problems of high production cost, low production efficiency, and large particle size of lithium nitride, achieve high yield, improve production efficiency, and improve The effect of reaction rate

Active Publication Date: 2021-10-22
SHENZHEN YANYI NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of high preparation cost, low production efficiency and large particle size of lithium nitride in the prior art, the present invention provides a preparation method and equipment for lithium nitride particles

Method used

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  • Lithium nitride particles and preparation method and preparation equipment thereof
  • Lithium nitride particles and preparation method and preparation equipment thereof
  • Lithium nitride particles and preparation method and preparation equipment thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0057] In addition, the present invention provides a device for preparing lithium nitride particles, which is used to implement the method for preparing lithium nitride particles according to claim 1, wherein the device includes the following components: a vacuum reduction furnace 1, Crucible 2, vacuum pump 3, micron ceramic filter 4, flow control valve 5, nitrogen supply device 6, reaction chamber 7, etc.; the nitrogen supply device 6 is connected to the reaction chamber 7, and the nitrogen intake is adjusted through the flow control valve 5, so A heating unit is arranged inside the reaction chamber;

[0058] A vacuum pump 3 is arranged below the vacuum reduction furnace 1;

[0059] A crucible 2 is placed in the center of the vacuum reduction furnace 1, and the crucible 2 is heated by resistance.

[0060] attached Figure 11 A schematic diagram of the equipment of the present invention is shown, and the dimensions, configurations, and positional relationships in the figure ...

Embodiment 1

[0075] Step 1, preparation of hybridization aids

[0076] At room temperature, using a high-efficiency mixer (VCH-5), Ca(OH) 2 with Al(OH) 3 After uniform mixing according to the mass ratio of 0.974:1, under the vacuum degree of 10Pa, the temperature was raised to 600°C at a heating rate of 5°C / min, and the holding time was 3h. After cooling to room temperature, it was taken out. Using a ball mill, a ball mill with a diameter of 5mm was used. The zirconium balls were used to grind the sample taken out. The mass ratio of balls to materials was 12:1, the speed of the ball mill was 600r / min, and the ball milling time was 2h. The hybridization aid was obtained after ball milling. The particle size D50 of the hybridization aid was measured by a laser particle size analyzer, and the particle size D50 of the prepared hybridization aid was 21.2 μm. Through XRD test and GSAS software, the phase quantitative analysis of the hybridization additive is carried out, and the hybridization ...

Embodiment 2～8

[0089] The steps of the preparation method are basically the same as those in Example 1, except for the relevant components and parameters, etc., as shown in Tables 1-4.

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Abstract

The invention relates to lithium nitride particles and a preparation method and preparation equipment thereof. Aiming at the problems of high preparation cost, low production efficiency and large particle size of lithium nitride in the prior art, the invention provides a preparation method of lithium nitride particles, which comprises the following steps of: firstly, preparing a hybridization auxiliary agent; then mixing a lithium source with the hybridization auxiliary agent well, and carrying out thermal decomposition to generate clinker; carrying out vacuum thermal reduction reaction on the clinker and a reducing agent to generate metal lithium steam; and finally, introducing high-purity nitrogen to react with the metal lithium steam to obtain the lithium nitride particles disclosed by the invention. Vacuum thermal reduction reaction and lithium nitride particle synthesis are continuously performed by precisely regulating and controlling the conditions such as the proportion of the hybridization auxiliary agent, the thermal reduction reaction temperature, the vacuum degree, the clinker amount, the reducing agent and the nitrogen flow, so that the lithium nitride particles with smaller particle sizes are prepared by utilizing the gas-phase reaction of lithium steam and nitrogen.

Description

technical field [0001] The invention relates to lithium nitride particles, a preparation method and preparation equipment thereof, in particular to nanoscale lithium nitride particles, a preparation method and preparation equipment for synthesizing lithium nitride particles by a gas phase reaction method. Background technique [0002] Lithium nitride (Li 3 N) is a metal nitride and the only stable binary compound formed by alkali metal and nitrogen. It belongs to the hexagonal crystal system. There is a lithium-nitrogen layer composed of lithium and nitrogen atoms in the lattice structure, and every two There is a lithium layer between the lithium-nitrogen layers. In the lithium nitride unit cell, the distance between Li-N is 213pm, which is close to the sum of the ionic radii of lithium ions and nitrogen anions, and the distance between each lithium-nitrogen layer and the adjacent lithium layer is 194pm, which indicates that the nitrided Lithium is an ionic compound. Li ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/06F27B14/04F27B14/08F27B14/14
CPCC01B21/061F27B14/04F27B14/08F27B14/14F27B2014/045Y02P40/121Y02E60/10
Inventor 张世奇杨凯钱超岳敏
Owner SHENZHEN YANYI NEW MATERIALS CO LTD