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Method for preparing high-purity alpha-PbO from beta-PbO

A technology of steel and vacuum balls, applied in the direction of lead monoxide and lead oxide, which can solve the problems of difficult to obtain α-PbO, and achieve the effect of high production cost, simple method and easy operation

Inactive Publication Date: 2019-08-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high-purity α-PbO is not easy to obtain. If the heating temperature is too high, α-PbO will become β-PbO and Pb 3 o 4 The mixture, if the heating temperature is too low, contains metallic lead and Pb 3 o 4 and other substances
β-PbO can be obtained by phase transformation of α-PbO at elevated temperature, but it is much more difficult to transform from β-PbO to α-PbO

Method used

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  • Method for preparing high-purity alpha-PbO from beta-PbO
  • Method for preparing high-purity alpha-PbO from beta-PbO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put β-PbO powder (particle size 100-200nm) in a vacuum ball mill jar, then seal it tightly, pass argon gas into the vacuum ball mill jar for three times, and then evacuate the vacuum ball mill jar to 100Pa.

[0034] (2) Put the vacuum ball mill tank of the step (1) on a (QM-3SP2) planetary ball mill for ball milling to finally obtain α-PbO; the vacuum ball milling time is 14h; the vacuum ball milling speed is 425rmp ; The vacuum pressure in the vacuum ball milling tank is 100Pa; the mass ratio of the quality of the steel ball milling balls in the vacuum ball milling tank to the β-PbO loaded in the vacuum ball milling tank is 15:1. After testing, the purity of α-PbO was 99.2%.

[0035] figure 1 It is the XRD figure of the raw material β-PbO adopted in the present invention; figure 2 It is the XRD figure of the product α-PbO of vacuum ball milling of the present invention, according to Figure 1~2 It can be seen that the present invention has indeed prepared α-PbO...

Embodiment 2

[0037] (1) Put β-PbO powder (particle size 100-200nm) in a vacuum ball mill jar, then seal it tightly, pass argon gas into the vacuum ball mill jar for three times, and then evacuate the vacuum ball mill jar to 1Pa.

[0038] (2) Put the vacuum ball mill tank of the step (1) on a (QM-3SP2) planetary ball mill for ball milling to finally obtain α-PbO; the vacuum ball milling time is 20h; the vacuum ball milling speed is 500rmp The vacuum pressure in the vacuum ball milling tank is 1Pa; the mass ratio of the quality of the steel ball milling balls in the vacuum ball milling tank to the loaded β-PbO is 20:1. After testing, the purity of α-PbO was 99.5%.

Embodiment 3

[0040] (1) Put β-PbO powder (particle size 100-200nm) in a vacuum ball mill jar, then seal it tightly, pass argon gas into the vacuum ball mill jar for three times, and then evacuate the vacuum ball mill jar to 50Pa.

[0041] (2) Put the vacuum ball milling tank of the step (1) on a (QM-3SP2) planetary ball mill for ball milling to finally obtain α-PbO; the vacuum ball milling time is 17h; the vacuum ball milling speed is 460rmp The vacuum pressure in the vacuum ball milling tank is 50Pa; the mass ratio of the quality of the steel ball milling balls in the vacuum ball milling tank to the β-PbO loaded in the vacuum ball milling tank is 17:1. After testing, the purity of α-PbO was 99.8%.

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Abstract

The invention provides a method for preparing high-purity alpha-PbO from beta-PbO, and belongs to the technical field of material preparation. The method comprises the following steps: carrying out vacuum ball milling on beta-PbO powder in a protective atmosphere to obtain alpha-PbO. The method is used for converting beta-PbO into alpha-PbO through the vacuum ball milling technology. The inventionprovides a novel alpha-PbO preparation method which is simple, easy to operate, high in economic benefit and low in production cost. The purity of the prepared alpha-PbO is greater than 99%.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing high-purity α-PbO from β-PbO. Background technique [0002] High-purity α-PbO and β-PbO have higher economic value and wider uses, while low-purity α-PbO and β-PbO are greatly reduced. α-PbO and β-PbO are usually obtained by oxidizing metallic lead by Shimadzu ball milling method and Barton vapor phase oxidation method, and the obtained lead powder has low purity and contains a large amount of metallic lead and Pb 3 o 4 and other substances, but as long as the temperature is high enough, high-purity β-PbO can be obtained. However, high-purity α-PbO is not easy to obtain. If the heating temperature is too high, α-PbO will become β-PbO and Pb 3 o 4 The mixture, if the heating temperature is too low, contains metallic lead and Pb 3 o 4 and other substances. β-PbO can be obtained by phase transformation of α-PbO at elevated temperature, but ...

Claims

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Application Information

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IPC IPC(8): C01G21/06
CPCC01G21/06C01P2006/80C01P2002/72
Inventor 田阳雍波杨斌徐宝强刘大春陈秀敏邓勇王飞曲涛李一夫蒋文龙
Owner KUNMING UNIV OF SCI & TECH
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