Preparation and physical properties of SrxLa 1-xMgAl11O19-0.5x

Huadong Yao; Qiang Xu; Ling Liu; Shizhen Zhu

doi:10.4028/www.scientific.net/AMR.105-106.403

Preparation and physical properties of Sr_xLa _1-xMgAl₁₁O_19-0.5x

Huadong Yao^*, Qiang Xu, Ling Liu, Shizhen Zhu

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

In order to further improve the thermal expansion coefficient of LaMgAl₁₁O₁₉, LaMgAl₁₁O₁₉with Sr ²⁺doped is designed to increase the density of oxygen vacancies, and the effect of doping Sr²⁺to hardness and toughness was studied. Sr_xLa_1-xMgAl₁₁O_19-0.5xpellets were synthesized by hot-pressing (1500°C, 40MPa). The relative density of LaMgAl₁₁O₁₉ reaches 97.68%. The hardness of LaMgAl ₁₁O₁₉ is about 25.47GPa and the fracture toughness is 11.3 MPa·m_1/2. The thermal expansion coefficient of LaMgAl ₁₁O₁₉was 8.71×10^-6K^-1, and Sr_0.6La_0.4MgAl₁₁O_18.7was 8.95×10^-6K^-1. The results showed hot-pressure sintering could synthesize dense Sr_xLa_1-xMgAl ₁₁O_19-0.5x with magnetoplumbite structure. Sr ²⁺doping could increase the thermal expansion coefficient of LaMgAl₁₁O₁₉.

Original language	English
Title of host publication	Chinese Ceramics Communications
Pages	403-405
Number of pages	3
Edition	1
DOIs	https://doi.org/10.4028/www.scientific.net/AMR.105-106.403
Publication status	Published - 2010
Event	6th China International Conference on High-Performance Ceramics, CICC-6 - Harbin, China Duration: 16 Aug 2009 → 19 Aug 2009

Publication series

Name	Advanced Materials Research
Number	1
Volume	105-106
ISSN (Print)	1022-6680

Conference

Conference	6th China International Conference on High-Performance Ceramics, CICC-6
Country/Territory	China
City	Harbin
Period	16/08/09 → 19/08/09

Keywords

Hexa-aluminate
Hot-pressing
Thermal expansion coefficient

Access to Document

10.4028/www.scientific.net/AMR.105-106.403

Cite this

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title = "Preparation and physical properties of SrxLa 1-xMgAl11O19-0.5x",

abstract = "In order to further improve the thermal expansion coefficient of LaMgAl11O19, LaMgAl11O19with Sr 2+doped is designed to increase the density of oxygen vacancies, and the effect of doping Sr2+to hardness and toughness was studied. SrxLa1-xMgAl11O19-0.5xpellets were synthesized by hot-pressing (1500°C, 40MPa). The relative density of LaMgAl11O19 reaches 97.68%. The hardness of LaMgAl 11O19 is about 25.47GPa and the fracture toughness is 11.3 MPa·m1/2. The thermal expansion coefficient of LaMgAl 11O19was 8.71×10-6K-1, and Sr0.6La0.4MgAl11O18.7was 8.95×10-6K-1. The results showed hot-pressure sintering could synthesize dense SrxLa1-xMgAl 11O19-0.5x with magnetoplumbite structure. Sr 2+doping could increase the thermal expansion coefficient of LaMgAl11O19.",

keywords = "Hexa-aluminate, Hot-pressing, Thermal expansion coefficient",

author = "Huadong Yao and Qiang Xu and Ling Liu and Shizhen Zhu",

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language = "English",

isbn = "0878492755",

series = "Advanced Materials Research",

number = "1",

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TY - GEN

T1 - Preparation and physical properties of SrxLa 1-xMgAl11O19-0.5x

AU - Yao, Huadong

AU - Xu, Qiang

AU - Liu, Ling

AU - Zhu, Shizhen

PY - 2010

Y1 - 2010

N2 - In order to further improve the thermal expansion coefficient of LaMgAl11O19, LaMgAl11O19with Sr 2+doped is designed to increase the density of oxygen vacancies, and the effect of doping Sr2+to hardness and toughness was studied. SrxLa1-xMgAl11O19-0.5xpellets were synthesized by hot-pressing (1500°C, 40MPa). The relative density of LaMgAl11O19 reaches 97.68%. The hardness of LaMgAl 11O19 is about 25.47GPa and the fracture toughness is 11.3 MPa·m1/2. The thermal expansion coefficient of LaMgAl 11O19was 8.71×10-6K-1, and Sr0.6La0.4MgAl11O18.7was 8.95×10-6K-1. The results showed hot-pressure sintering could synthesize dense SrxLa1-xMgAl 11O19-0.5x with magnetoplumbite structure. Sr 2+doping could increase the thermal expansion coefficient of LaMgAl11O19.

AB - In order to further improve the thermal expansion coefficient of LaMgAl11O19, LaMgAl11O19with Sr 2+doped is designed to increase the density of oxygen vacancies, and the effect of doping Sr2+to hardness and toughness was studied. SrxLa1-xMgAl11O19-0.5xpellets were synthesized by hot-pressing (1500°C, 40MPa). The relative density of LaMgAl11O19 reaches 97.68%. The hardness of LaMgAl 11O19 is about 25.47GPa and the fracture toughness is 11.3 MPa·m1/2. The thermal expansion coefficient of LaMgAl 11O19was 8.71×10-6K-1, and Sr0.6La0.4MgAl11O18.7was 8.95×10-6K-1. The results showed hot-pressure sintering could synthesize dense SrxLa1-xMgAl 11O19-0.5x with magnetoplumbite structure. Sr 2+doping could increase the thermal expansion coefficient of LaMgAl11O19.

KW - Hexa-aluminate

KW - Hot-pressing

KW - Thermal expansion coefficient

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SN - 9780878492756

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T2 - 6th China International Conference on High-Performance Ceramics, CICC-6

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