Method of producing ultra-fine perovskite type LaFeO*, LaMnO*, LaNiO*

A perovskite-type, ultra-fine calcium technology, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve problems such as uneven distribution, small specific surface area, large particle size, etc., and achieve easy industrialization, specific surface area Great effect of improving physical and chemical properties

Inactive Publication Date: 2008-05-07
ZHONGBEI UNIV
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention overcomes the LaFeO synthesized by the current gel combustion synthesis method 3 , LaMnO 3 , LaNiO 3 It has the disadvantages of large particle size

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of producing ultra-fine perovskite type LaFeO*, LaMnO*, LaNiO*
  • Method of producing ultra-fine perovskite type LaFeO*, LaMnO*, LaNiO*
  • Method of producing ultra-fine perovskite type LaFeO*, LaMnO*, LaNiO*

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Embodiment 1

[0027] Weigh lanthanum nitrate, ferric nitrate, and stearic acid at a molar ratio of 1:1:10. Under oil bath heating conditions, first dissolve stearic acid, dissolve the solids of lanthanum nitrate and ferric nitrate in molten stearic acid under constant-temperature magnetic stirring, control the temperature at 116°C, and react for 6.0 hours to form a gel. Place the gel in a 300°C Maffei furnace and heat it to burn. Can directly obtain perovskite-type superfine powder LaFeO 3 . XRD and morphology of powder figure 1 with figure 2

Example Embodiment

[0028] Embodiment 2

[0029] Weigh lanthanum nitrate, ferric nitrate, and stearic acid at a molar ratio of 1:1:8. Under oil bath heating conditions, first dissolve stearic acid, and under constant-temperature magnetic stirring, dissolve the solids of lanthanum nitrate and ferric nitrate in molten stearic acid, control the temperature at 114°C, and react for 5.0 hours to form a gel. Place the gel in a 300°C Maffei furnace and heat it to burn. Can directly obtain perovskite-type superfine powder LaFeO 3 . The specific surface area and morphology of the particles are shown in Table 1

[0030] 2.LaMnO 3 Preparation

[0031] Embodiment 1

[0032] Weigh lanthanum nitrate, manganese chloride, and stearic acid at a molar ratio of 1:1:10. Under oil bath heating conditions, first dissolve stearic acid, dissolve the solids of lanthanum nitrate and manganese chloride in molten stearic acid under constant-temperature magnetic stirring, control the temperature at 108°C, and react for 6 hours to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method for super fine perovskite LaFeO3, LaMnO3 and LaNiO3 with a stearic acid gel burning method. The invention has technical proposal that (1) lanthanum nitrate and ferric nitrate and stearic acid are weighted with mol rate of 1:1:(7 to 10); lanthanum nitrate and ferric nitrate solid are smelted into the meltdown stearic acid; and the temperature is controlled by ranging from 114 DEG C to 125 DEG C for reacting for higher than 5 hours for gelling; and then the gel is arranged inside a muffle furnace having temperature range from 300 DEG C to 500 DEGC for burning so as to obtain LaFeO3 powder; (2) lanthanum nitrate, manganese chloride and stearic acid are weighted with a mol rate of 1:1:(7 to 10); lanthanum nitrate and manganese chloride solid are smelted into the meltdown stearic acid; and the temperature is controlled by ranging from 104 DEG C to 118 DEG C for reacting for higher than 6 hours for gelling; and then the gel is arranged inside a muffle furnace having temperature ranging from 300 DEG C to 500 DEGC for burning, so as to obtain LaMnO3 powder; (3) lanthanum nitrate, nickel nitrate and stearic acid are weighted with a mol rate of 1:1:(7 to 10); lanthanum nitrate and nickel nitrate solid are smelted into the meltdown stearic acid; and the temperature is controlled by ranging from 102 DEG C to 109 DEG C for reacting for higher than 6 hours for gelling; and then the gel is arranged inside a muffle furnace having temperature ranging from 300 DEG C to 500 DEGC; and the burned powder is calcined for one hour in different temperatures higher than 758 DEG C, so as to obtain LaNiO3 with different granularity sizes.

Description

technical field [0001] The invention belongs to perovskite ultrafine powder LaFeO 3 , LaMnO 3 , LaNiO 3 The field of preparation technology, specifically the preparation of perovskite ultrafine powder LaFeO by stearic acid gel combustion method 3 , LaMnO 3 , LaNiO 3 . Background technique [0002] LaFeO 3 , LaMnO 3 , LaNiO 3 It belongs to perovskite type rare earth composite oxide, which can be used as catalyst for environmental pollution treatment, oxygen sensor, solid fuel cell, etc. Most of its properties depend on the production method of the powder. So a good synthesis method can often greatly change its physical and chemical properties. [0003] Preparation of LaFeO 3 , LaMnO 3 , LaNiO 3 The method usually adopts high temperature solid phase method, chemical co-precipitation method, sol-gel method, hydrothermal synthesis method and low temperature combustion synthesis method. The samples prepared by the high-temperature solid-phase method have excellent p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G49/00C01G45/12C01G53/00
Inventor 卫芝贤李延斌姚根有董亚文刘乘风高艳丽刘海燕
Owner ZHONGBEI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap