Polymerized complex route to synthesis of pure Y2Ti2O7 at 750 degrees C using yttrium-titanium mixed-metal citric acid complex

被引：67

作者：

Kakihana, M

Milanova, MM

Arima, M

Okubo, T

Yashima, M

Yoshimura, M

机构：

[1] Res. Lab. of Engineering Materials, Tokyo Institute of Technology

[2] Faculty of Chemistry, University of Sofia, Sofia

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1996年 / 79卷 / 06期

关键词：

D O I：

10.1111/j.1151-2916.1996.tb08781.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 polymerized complex technique was used to prepare high-purity pyrochlore Y2Ti2O7 powders at 750 degrees C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and yttrium and titanium ions, with a molar ratio of CA:EG:Y:Ti = 5:20:1:1, at 130 degrees C produced a yellowish transparent polymeric gel without any precipitation; this material was used subsequently as a precursor for Y2Ti2O7. Based on the results of C-13-NMR spectroscopy, it was suggested that a mixed-metal (Y,Ti)-CA(3) chelate complex formed in a starting CA/EG solution, The formation of pure pyrochlore Y2Ti2O7 occurred when the precursor was heat-treated in a furnace set at 750 degrees C in static air for 4 h.

引用

页码：1673 / 1676

页数：4

共 12 条

[1] ON THE FACTORS DETERMINING THE TITANATE LUMINESCENCE IN SOLIDS [J].

ALARCON, J ;

BLASSE, G .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1993, 135 (02) :627-631

[2] YTTRIUM OXIDE - TITANIUM DIOXIDE SYSTEM [J].

AULT, JD ;

WELCH, AJE .

ACTA CRYSTALLOGRAPHICA, 1966, 20 :410-&

[3]

FUJITA T, 1982, CHEM PHARM BULL, V30, P3461

[4] LUMINESCENCE OF PYROCHLORES [J].

HAMOUMI, M ;

WIEGEL, M ;

BLASSE, G .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 108 (02) :410-412

[5]

JOHNSON LF, 1972, CARBON 13 NMR SPECTR

[6] ''Sol-Gel'' preparation of high temperature superconducting oxides [J].

Kakihana, M .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 1996, 6 (01) :7-55

[7]

Kakihana M., 1995, CERAMIC T, V55, P65

[8]

KNNOP O, 1969, CAN J CHEM, V47, P971

[9]

Pechini M.P, 1967, US Pat. Off., Patent No. [3330697, 3,330,697]

[10] ELECTRICAL AND CATALYTIC PROPERTIES OF SOME OXIDES WITH THE FLUORITE OR PYROCHLORE STRUCTURE .2. CATALYTIC-OXIDATION OF CARBON-MONOXIDE [J].

TERMAAT, JHH ;

VANDIJK, MP ;

ROELOFS, G ;

BOSCH, H ;

VANDEVELDE, GMH ;

GELLINGS, PJ ;

BURGGRAAF, AJ .

MATERIALS RESEARCH BULLETIN, 1984, 19 (10) :1271-1279

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