Synthesis, densification and oxidation study of lanthanum hexaboride

被引：55

作者：

Sonber, J. K. ^{[1
]}

Sairam, K. ^{[1
]}

Murthy, T. S. R. Ch. ^{[1
]}

Nagaraj, A. ^{[2
]}

Subramanian, C. ^{[1
]}

Hubli, R. C. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Mat Proc Div, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Laser & Plasma Technol Div, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 05期

关键词：

LaB6; Synthesis; Densification; Rare earth boride; Oxidation; LAB6; NANOWIRES; NANOPARTICLES; MECHANISM; CRYSTALS; POWDER; ROUTE;

D O I：

10.1016/j.jeurceramsoc.2013.11.023

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper presents the result of investigation carried out on the synthesis, densification and oxidation studies of LaB6. LaB6 was synthesized by boron carbide reduction of La2O3. Effect of temperature on product quality was investigated. Pure LaB6 powder was obtained at 1500 degrees C, in vacuum. Pressureless sintering at 1950 degrees C of LaB6 powder resulted in a density of only 85.1% of the theoretical value. Hot pressing resulted in near theoretical density at the same operating temperature. Hardness and fracture toughness of the dense LaB6 was measured as 20 GPa and 3.02 MPa m(1/2) respectively. Oxidation study by thermogravimetry revealed that oxidation starts slowly at 500 degrees C and accelerates at 700 degrees C. Isothermal oxidation study revealed that protective oxide layer forms on LaB6 surface on oxidation at 900 degrees C. The presence of protective continuous oxide layer on the surface was observed even after 64 h exposure in air atmosphere. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1155 / 1160

页数：6

共 50 条

[21] Synthesis of nanocrystalline lanthanum phosphate for low temperature densification to monazite ceramics
Rajesh, K
Sivakumar, B
Pillai, PK
Mukundan, P
Warrier, KGK
Nair, VR
MATERIALS LETTERS, 2004, 58 (11) : 1687 - 1691
[22] Effects of milling parameters on the microstructural and thermal properties of nanocrystalline lanthanum hexaboride powders
Agaogullari, Duygu
Balci, Ozge
Ovecoglu, M. Lutfi
Duman, Ismail
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY, 2018, 54 (01) : 177 - 190
[23] Nanoscale photoelectron ionisation detector based on lanthanum hexaboride
Zimmer, C. M.
Schubert, J.
Hamann, S.
Kunze, U.
Doll, T.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2011, 208 (06): : 1241 - 1245
[24] Gas solid techniques for preparation of pure lanthanum hexaboride
Mukherjee, A.
Gulnar, A. K.
Sahoo, D. K.
Krishnamurthy, N.
RARE METALS, 2012, 31 (03) : 285 - 289
[25] Synthesis, Densification and Characterization of Boron Carbide
Sonber, J. K.
Murthy, T. S. R. Ch
Subramanian, C.
Fotedar, R. K.
Hubli, R. C.
Suri, A. K.
TRANSACTIONS OF THE INDIAN CERAMIC SOCIETY, 2013, 72 (02) : 100 - 107
[26] Preparation and Properties of Poly Methyl Methacrylate/Lanthanum Hexaboride Nanocomposites
Hu, Lijie
Min, Guanghui
Yang, Xue
ADVANCES IN COMPOSITES, PTS 1 AND 2, 2011, 150-151 : 703 - 706
[27] Consolidation and high-temperature strength of monolithic lanthanum hexaboride
Demirskyi, Dmytro
Suzuki, Tohru S.
Yoshimi, Kyosuke
Vasylkiv, Oleg O.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2022, 105 (06) : 4277 - 4290
[28] Investigation of the elemental composition of lanthanum-cerium hexaboride crystals
Badalyan, Georgi
Kuzanyan, Armen
Petrosyan, Vahagn
Kuzanyan, Vazgen
Gulian, Armen
INTERNATIONAL CONFERENCE ON LASER PHYSICS 2010, 2011, 7998
[29] Low Temperature Synthesis and Surface Plasmon Resonance of Colloidal Lanthanum Hexaboride (LaB6) Nanocrystals
Mattox, Tracy M.
Agrawal, Ankit
Milliron, Delia J.
CHEMISTRY OF MATERIALS, 2015, 27 (19) : 6620 - 6624
[30] Research Progress on Multicomponent Lanthanum Based Hexaboride Solid Solutions
Yu Yiping
Wang Song
Li Wei
RARE METAL MATERIALS AND ENGINEERING, 2023, 52 (05) : 1954 - 1962

← 1 2 3 4 5 →