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2011/09/21

()

()()

3-2

I Introduction(1/6)

3-3

I Introduction(2/6)

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I Introduction(3/6)

1.

2.

3.

4.

5.

6.

3-5

I Introduction(4/6)

3-6

I Introduction(5/6)

ZnO

Band Gap Eg(eV) 3.4

Lattice parameters() a3.2 c5.2

Dopants Al, B, Mn, In, Ga, Si, Sn, F

Effective electron mass() 0.28

Density(g/cm3) 5.67

Crystal structure hexagonal, wurtzite

Relative permittivity 8.1

Melting point of Zn metal() 420

(ZnO)II-VIn-type(HCP)(Wurtzite structure)3.4 eV60 meVa3.2 c5.2 (380nm~780nm)(

3-7

I Introduction(6/6)

(2-methoxy ethanol)

(Anhydrous ethanol)(ZnO)(Al)

3-8

II Experimental(1/5)

1

24

111

0 %1 %3 %5 %

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II Experimental(2/5)

(2.5cm) (2.5cm)

(15min)

(15min)

2

(15min)

(30min)

3-10

II Experimental(3/5)

1020

(0.2ml)

1500rpm

(10 s)

3000rpm

(20 s)

(5min)

(1hr)

3-11

II Experimental(4/5)

(SDT)

X(XRD)

(SEM)

EDS

EDS

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II Experimental(5/5)

(-Step)

(UV-VSI-NIR)

(FourPoint Probe)

3-13

III Results and discussion(1/19)

(a) (b)

(C) (d)

70%

17%

(a)0%(b)1%(c)3% (d)5%TGA/DSC

3-14

III Results and discussion(2/19)

XRD

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III Results and discussion(5/19)

(a)0%(b)1%(c)3% (d)5%EDS

Element Weight% Atomic%

O 19.54 51.90

Zn 70.71 45.97

Pt 9.75 2.12

Totals 100.00

Element Weight% Atomic%

O 18.14 49.84

Al 0.32 0.52

Zn 69.89 47.01

Pt 11.65 2.63

Totals 100.00

Element Weight% Atomic%

O 18.29 50.26

Al 0.84 1.37

Zn 67.39 45.33

Pt 13.48 3.04

Totals 100.00

Element Weight% Atomic%

O 20.22 53.15

Al 1.68 2.62

Zn 64.04 41.20

Pt 14.06 3.03

Totals 100.00

(a) (b)

(c) (d)

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III Results and discussion(7/19)

(a)0%(b)1%(c)3%(d)5%SEM

(a) (b)

(c) (d)

0% 53.86nm

1% 29.571nm

3% 27.591nm

5% 24nm

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III Results and discussion(10/19)

-

0%

5%

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III Results and discussion(11/19)

-

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III Results and discussion(13/19)

(Eg)

hAEgn1/22/3(h)2 = 0 (Eg)

TRd

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III Results and discussion(15/19)

3.2667eV

3.3394eV

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III Results and discussion(18/19)

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2011/09/21

BZT

()()

3-23

PZT

(BaTiO3)ZrBZT

Ba(ZrXTi1-X)O3= 00.10.20.30.5(BZT)(BZT)

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BaTiO3ZrO2

Ball milling

Drying

Pressig

Sintering

Poling

r

Density

X-ray

SEM

Shrinkage

EDS

1. 2. X

3.

2. X

4. Agilent 4285

5.

3-25

XRD

20 30 40 50 60 70

0

500

1000

1500

2000

Ba(Zr0.5

Ti0.5

)O3

Ba(Zr0.3

Ti0.7

)O3

Ba(Zr0.2

Ti0.8

)O3

Ba(Zr0.1

Ti0.9

)O3

BaTiO3

BZTZrO

2

lnte

nsity

2

. 6 XRD of BZT ceramic sintered at 1400 with different Zr-doped.

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SEM()

. 6 SEM of Zr-doped BZT ceramic sintered at 1400

(a) 0wt% Outside (a) 0wt% Inside

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(b) 10wt% Outside

4-2 SEM ()

(b) 10wt% Inside

. 7 SEM of Zr-doped BZT ceramic sintered at 1400

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0 10 20 30 40 50

8.0

8.2

8.4

8.6

8.8

9.0

Rel

ativ

e de

nsity

wt%

. 11 Relative density of the Zr-doped of BZT ceramic sintered at 1400.

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0 10 20 30 40 50

37

38

39

40

41

42

43

44sh

rink

age%

wt%. 12 Shrinkage as functions of the Zr-doped of BZT ceramic sintered at 1400.

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BZTBZT

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6061

1

2

6061

3

6061

4

5

6061

6

7

8

9

10

11

12

13

14

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