Mechanochemical synthesis of lanthanum oxyfluoride from lanthanum oxide and lanthanum fluoride

被引：39

作者：

Lee, J ^{[1
]}

Zhang, Q ^{[1
]}

Saito, F ^{[1
]}

机构：

[1] Tohoku Univ, Inst Adv Mat Proc, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 04期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00753.x

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：

A powder mixture of lanthanum oxide (La2O3) and lanthanum fluoride (LaF3) was ground by a planetary ball-mill to investigate the mechanochemical reaction forming lanthanum oxyfluoride (LaOF) at room temperature. The grinding enables us to form LaOF monophase, and the reaction proceeds with an increase in grinding time, whereas the crystallite size of LaOF formed is about 15-20 nm irrespective of the grinding time. Other rare-earth oxyfluorides (R-OF, R = Pr, Nd, Sm, Gd) can be synthesized by grinding the constituent components (R2O3 and RF3).

引用

页码：863 / 865

页数：3

共 16 条

[1] Study of phase transition and volume thermal expansion in a rare-earth (RE) oxyfluoride system by high-temperature XRD (RE=La, Nd, Sm, Eu and Gd) [J].

Achary, SN ;

Ambekar, BR ;

Mathews, MD ;

Tyagi, AK ;

Moorthy, PN .

THERMOCHIMICA ACTA, 1998, 320 (1-2) :239-243

[2] The characterization of BaCO3-modified LaOF catalysts for the OCM reaction [J].

Au, CT ;

Zhang, YQ ;

He, H ;

Lai, SY ;

Ng, CF .

JOURNAL OF CATALYSIS, 1997, 167 (02) :354-363

[3]

Brown D., 1968, The Halides of the Lanthanides and Actinides

[4] METHANE OXIDATIVE COUPLING ON BAF2/LAOF CATALYST [J].

CHAO, ZS ;

ZHOU, XP ;

WAN, HL ;

TSAI, KR .

APPLIED CATALYSIS A-GENERAL, 1995, 130 (02) :127-133

[5]

Cullity BD, 1977, ELEMENTS XRAY DIFFRA

[6] Crystal structure of lanthanum oxyfluoride [J].

Fergus, JW .

JOURNAL OF MATERIALS SCIENCE LETTERS, 1997, 16 (04) :267-269

[7]

HAGENMULLER P, 1985, INORGANIC SOLID FLUO, P205

[8]

KLEMM VW, 1941, Z ANORG ALLG CHEM, V248, P167

[9] HIGH-TEMPERATURE X-RAY-DIFFRACTION STUDY OF THE RHOMBOHEDRAL-CUBIC PHASE-TRANSITION OF ROF WITH R=Y, LA, PR, ND, SM-ER [J].

MULLER, JH ;

PETZEL, T .

JOURNAL OF ALLOYS AND COMPOUNDS, 1995, 224 (01) :18-21

[10] Constituent selection and performance characterization of catalysts for oxidative coupling of methane and oxidative dehydrogenation of ethane [J].

Wan, HL ;

Chao, ZS ;

Weng, WZ ;

Zhou, XP ;

Cai, JX ;

Tsai, KR .

CATALYSIS TODAY, 1996, 30 (1-3) :67-76

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