Abstract
This paper presents the synthesis and characterization of Y3Fe5O12, Gd3Fe5O12 and Dy3Fe5O12 nanoparticles by sol-gel method using initial salts solution of Y(NO3)3, Gd(NO3)3, Dy(NO3)3, Fe(NO3). The lattice constant, crystallite size and particle morphology of these ferrite garnet nanoparticles were studied by using X-ray diffraction and transmission electron microscopy (TEM). The results showed that the garnet samples prepared by this method were formed at 800oC, which is lower than the sintering temperature for ceramic bulk samples (1400oC). The particle size is in the range 25- 40 nm as observed via TEM image and the average particle size was found to be 37nm using Debye- Scherrer formula.
Highlights
Kích thư c trung bình các h t ferit theo công th c Scherrer xác ñ nh t i ñ nh nhi#u x (420) là 29, 37 và 38 nm tương ng v i R = Y, Gd và Dy. 5nh transmission electron microscopy (TEM) c a Y3Fe5O12 trong Hình 5 cho th y các h t này có d ng g$n hình c$u, có xu hư ng kttlivi nhau v i kích thư c h t t' 25-40nm, phù hpvikt qu tính t' gi n ñ% nhi#u x tia X
This paper presents the synthesis and characterization of Y3Fe5O12, Gd3Fe5O12 and Dy3Fe5O12 nanoparticles by sol-gel method using initial salts solution of Y(NO3)3, Gd(NO3)3, Dy(NO3)3, Fe(NO3)
The lattice constant, crystallite size and particle morphology of these ferrite garnet nanoparticles were studied by using X-ray diffraction and transmission electron microscopy (TEM)
Summary
Các h t nano ferit garnet ñư c kh o sát h ng s m ng, kích thư c tinh th , hình d ng h t theo gi n ñ$ nhi u x tia X và nh hi n vi ñi n t truy n qua (TEM). Đivivt li u ch t o theo phương pháp g m truy n th ng, nhi t ñ t i thi u c$n thi t ñ hình thành pha garnet là kho ng trên 1300oC.
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