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LANDOLT-BORNSTEIN 

Numerical Data and Functional Relationships 
in Science and Technology 

New Series 

Editor in Chief: K.-H. Hellwege 



Group III: Crystal and Solid State Physics 

Volume 3 
Ferro- and Antiferroelectric Substances 

by ToshlO Mitsui and 

R. Abe • Y. Furuhata • K. Gesi . T. Ikeda . K. Kawabe 
Y. Makita • M. Marutake • E. Nakamura • S. Nomura 
E.Sawaguchi • Y.Shiozaki . I.Tatsuzaki • K.Toyoda 

Editors: K.-H. Hellwege and A.M. Hellwege 




Springer-Verlag Berlin • Heidelberg • New York 1969 



dtST AVAILABLE COPY 



II 7 Layer-structure oxides 



Figures p. 375 ff. 



Q, 
O 



0> 

O 
O 
< 



7 Layer-structure oxides 






7A Pure compound 


s of simple typ 


e 




Nr. 7A-1 BigTiNbO, 








la 


Dielectric anomaly associated with a phase transition was reported by Ismailzade in 
1960. 


Ann 


b 


phase 


11 


I 






state 




pa) 


*)60l 1 




crystal system 


orthorhombic b ) 


tetragonal »>) 


u )6zo 7 / 




space group 


Fmm2-C# 


I4/mmm-Dj£ 






e* 


900 — 


950 °C*>) 






q = 6.4- 10 s kg m- 3 . 

a = 5.40 A, b = 5.44 A, c « 25,1 A at RT. 


62S17 


4 


Temperature dependence of Lattice parameters: Fig. 868. 
Linear thermal expansion: Fig. 869. 




5a 


Dielectric constant: Fig. 870. 
x « 100 at RT. 

The dielectric constant was not measured in the vicinity of the transition point be- 
cause of high conductivity. Extrapolation of the Curie temperatures of the solid 
solution system obtained by the dielectric measurements indicates a transition tem- 
perature between 900° and 950 a C for Bi s TiNbO a . 


61S11 


Nr. 7A-2 BisTiTaOe 








la 


Phase transition similar to that of Bi 3 TiNbO, was reported by Subbarao in 1962. 


62S17 


b 


phase 


II 


I 






state 




P 






crystal system 


orthorhombic 


tetragonal 






space group 


Fmm2-C# 


I4/mmm-D»J 






e 


870 


°C 


62S17 




q = 8.5- 10 8 kgm- 3 . 

a » 5.39 A, b/a = 1.007, o « 25.1 A at 1U\ 




4 


Linear thermal expansion: see Fig. 869. 




5a 


Dielectric constant: x « 140 at RT. 


62S17 


Nr. 7A-3 CaBi 8 Nb 2 O fl 






la 


Dielectric anomaly associated with a phase transition was discovered by Ismailzade 
in 1960. 


6011 


b 


phase 


II 


I 






state 




P 






crystal system 


orthorhombic 


tetragonal 






space group 


Fmm2-CJJ 


14/mmm-DJJ 






0 


625 °C 


6011 




q = 5.0 • 10 3 kg m" 3 . 

a = 5.39 A, bja = 1.006, c = 25.15 A at RT. 


62S17 


4 


Temperature dependence of lattice parameters: Tab. 104. 




5a 


Dielectric constant: Fig. 871. « 


r* 80 at RT. 


62S17 


* According to [601 f\ & is 600 • ■ • 650 °C 







Furuhata 



107 



Figuren S. 376 



II 7 Oxide mit Schichtstruktur 



Tab 104 *r 

-, — Lj- em P^ature dependence of the lattice parameters of CaBi a Nb,O g and CaBi^O, [6021] 

— 1 I ISO I 200 j 250 i 300 1 350 I 400 pC~ 



100 


1 <tn 

LD\J 


200 


I 250 


T 

| 300 


l 1 

| 350 






CaBi 8 Nb 2 O a 






_ 


5.453 




5.458 




5.465 


— 


5.484 




5.487 




5.491 


— 


24.955 




24.990 





25.035 




1.0056 




1.005 s 




1.0047 




746.0 




748.5 




751.0 


5.438 




CaBi 2 Ta 2 O 0 








5.444 




5.452 




5.471 




5.475 6 




5.479 




24.980 




25.015 




25.040 




1.006 




1.005 B 




1.005 




743.2 




745.6 




748.0 





a 

b 
c 

bfa 
V 

a 
b 
c 

bja 
V 



5.442 
5.482 6 
24.920 
1.0075 
743,5 

5.435 
5.468, 
24.970 
1.006 
742.0 



5.464 
5-482, 
25.060 
1.0035 



A 
A 

A 
A* 

A 
A 
A 

A> 



450 



500 



a 
b 
c 

bja 
V 



5.480 
5.496, 
25.070 
1.0036 
755.0 



5.485 
5.501 5 
25.080 
1.0029 
756.8 



a 
b 
c 

bja 
V 



5.470 
5.483, 
25.070 
1.002s 
751.9 

Nf.7A-4 C aByr a2 Q ft 



550 


575 


600 


| 650 


| 700 


°C 




CaBijNbjO, 










5.488 a 


5.495 8 




5.502s 


5.504 


A 


5.5026 


5.503, 




5.502s 


5.504 


A 


25.090 


25.105 




25.125 


25.140 


A 


1.0025 


1.0015 




1.000 


1.000 




758.0 


759.3 




760.7 


761.6 


A* 




CaBi,Ta t O„ 










5.473 




5.479 


5.484 




A 


5.484 




5.479 


5.484 




A 


25.083 




25.085 


25.105 




A 


1.002, 




1.000 


1.000 






752.8 




730.0 


755.0 




A* 



la 



5a 



I960!* ° anomalv associated with a phase transition was discovered by Ismailzadb 



I960, 
phase 

state 



crystal s^™ 



jpacegroup 



e 



II 



orthorhombic 



Fmm2-Cjj 



tetragonal 



14/mmm-D^ 



Q - 7-5'l03W L 
a = ^ 428A^/ a 



575 °C 
1.006, c = 24.90 A at RT. 



Igggg^ture dependence of lattice parameter: see Tab. 104. 



Dielectric constant: Fig. 872. 



Nr.7A-5 Sr B^Nb.0, 



6011 
6011 



6011 
61S11 



la 



5a 



7a 



hi 1 196i n ° anomalv associated with a phase transition was discovered by Smolenskii 
phase 



state 



J^ystaUystem 



II 


I 




P 


orthorhombic 


tetragonal 



420 

, „ 440») °C 

6-9 - 10*kgm- a *). 

J^Kb/a « 1.000, c = 25.05 A at RT. 



x = C^r ""2*** 873. « a 190 at RT. 
Zil 1 — ®d). w kere C = 0.55 - 10 s °C, 9 V = 390 °C. 



Piezoelectricity: d M = i. 0 . i 0 -» C N~ 



61S11 



61S11 
*)62S17 

62S15 



62S17 



62S17 



108 



Furuhata/Nomura 



a 
o 

■Q 
JD 

D 

o 

< 

to 
CO 



II 7 Layer-structure oxides 



Figures p. 376ff. 



Nr. 7A-6 SrBi 8 TaA 



Ferroelectricity in SrBi.TaA was reported by Smolensk!! in 1961. 



phase 



state 



crystal system 



e 



ii 



orthorhombic 



tetragonal 



310 °C 



5 = 7.5- 10' kg rn->. 
a » 5.512 A, 6/a = 1.000, c = 25.00 A at RT. 



Dielectric constant: Fig. 874. x ^ 180 at RT 
x = C /(T - Op). C - 2.0 • W 0 P = 190 °C. 
Spontaneous polarization: F 6 = 5.8 • 10"" C m" 8 at 25 



Nr. 



Piezoelectric constant: d* s 
7A-7 BaBi^NbA 



: 2.3 • I0~ u C N~ l . 



62S17 
62S17 



62S17 



Dielectric anomaly associated with a phase transition was discovered by Smolensky 
in 1961. 


phase 


II 


I 


state 




P 


crystal system 


orthorhombic 


tetragonal 


B 


210 °C 
200») °C 


a = 5.554 A, b/a - 1.000, c = 25.60 A at RT. 



5a| Dielectric constant: Fig. 875. x = 280 at RT 



61S11 



61S11 
*)62S17 

6251$ 



62S17 



Nr. 7A-8 BaBisTajO, 



5a 



Dielectric anomaly associated with a phase transition was discovered by Smolenskit 
in 1961. 



phase 



state 



crystal system 



II 



orthorhombic 



tetragonal 



9 

According to [61S11] B is 70 °C 
e = 8.4- 10 8 kgm-» 
a = 5.556 A, b/a 



110*) °C 

°C. 

1.000, c = 25.50 A at RT. 



Dielectric constant: Fig. 876. x = 400 at RT. 



61S11 



61S11 

*)62S17 

61S11 

62S15 



62S17 



Nr.7A-9 PbBi,Nb 2 0 6 



Dielectric anomaly associated with a phase transition in PbBi 8 Nb A ™» reported 
by Smolensk n in 1959. 
phase 



state 



5a 



crystal system 



0 



II 



orthorhombic 



tetragonal 



526 °C 
550*) °C 



p = 7.6 ■ 10' kg m-K 

a = 5.488 A, 6/fl = 1-002, c = 25.55 A at RT. 



Crystal structure: Fig. 877. 



Temperature dependence of lattice parameters: Fig. 878. 



Dielectric constant: Fig. 879. « - 170 at RT 
x = CUT - Q P ), C « 1-3 ■ 10» »K, 6 P = 510 °C 



7a Piezoelectric constant: d w = 1.5 -10 11 CN l . 



59S8 

59S8 

*)61S15 

62S15 



62S17 
62S17 



Furuhata/Nomura/Nakamura 



109 



Figure* S. 377 ff. 



II 7 Oxide mit Schichtstruktur 



Nr. 7A-10 PbBiaTa^O, 



5a 



Ferroelectricity was reported by Subbarao*) and Smolensk^) independently in 196 1 . 



phase 


ii 


I 


state 


F 


P 


crystal system 


orthorhombic 


tetragonal 


e 


430 *C 



q = 9.0 • 10 8 kg m-» 
a ~ 5.496 A, bja = 1.000, c « 25.40 A at RT. 



Dielectric constant: Fig. 880. * — 180 at RT 

x = c/(r - e p ), c *= 3.7 • w °c, © p = 325 -c. 



7a Piezoelectric constant: d a — 5 * 10~ 13 C N* 1 . 
Nr. 7A-11 B^TisOu 



*)61S15 
*)61S11 



61S15 
61S11 

62S15 



62S17 



62S17 



2a 



10 



14a 
b 
17~~ 



Ferroelectricity in Bi/Ti,0 ls was reported by Van Uitert et al. in 1961. 

I 



phase 


ii 


state 


F 


crystal system 


monocUnic*)* 
(pseudo-orthorhombic) 


e 


675 



tetragonal 



Unit cell is very nearly orthorhombic with the lattice parameters: Oorth — 5.411 A., 

6orth = 5.448 A, corth = 32.85 A at RT. 

Relations between crystallographic axes: Fig. 881. 

P t lies in a direction tilted at approximately 7° (or less) from the major crystal sur- 
face in a plane parallel to the pseudo-orthorhombic b — c plane 



Crystal growth : Cooling method from melt consisting of 1 00 BuO a and 5 TiO. (weight 
ratio). 



Crystal structure : Fig. 882. 



Temperature dependence of lattice parameter: Fig. 883. 
Thermal expansion: Fig. 884. 



Dielectric constant : Fig. 885. 
P a and£ c :Fig. 886, 887. 

Tambovtsev et al. measured P s and E e by applying a field parallel to the Corto 
direction, P 8 = 1.99 * 10~» C m~ s , E t = 1?13 ■ 10* V mA 

According to [67C6], the spontaneous polarization lies in the pseudo-orthorhombic 
(100) plane and has a value larger than 30 • 1Q-* C m" g . 



Piezoelectric constant: d„ — 2.0 • 10 _u C N™ 1 . 



Conductivity: see 



Domain structure: see 

Domains have been observed by polarized light. 

Switching: Fig. 888. 889. 

See also Fig. 892, Tab. 105 and: 



Twinning structure: see 
Nr. 7A-12 BaBi,Ti a NbO I2 



61V 2 

61V 2 
*)67C6 



67C6 



61 V2 



63T1 
67C6 



61S17 



64PS 



64P3 
66C7 

66P6 



64P5 



Dielectric anomaly associated with a phase transition was reported by Subbak ao inl 961. 


61S15 


phase 


II 


I 




state 




P 




crystal system 


pseudo-tetragonal 


tetragonal 


61S15 


e 


270 "C 




a = 3.874 A, c 


= 33.70 A at RT. 







Nr. 7A-13 PbB^TisNbOu 

1 a | Dielectric anomaly associ ated with aphase transition was reported by Subb ar ao in 1 96 1 . 



61 SI 5 



* Point group is m. 



110 



Furuhata/Notriura 



II 7 Layer-structure oxides 



Figures p. 379 



7a 
14b 



lb 



phase 

state 

crystal system 



ii 



pseudo-tetragonal 



tetragonal 



290 °C 



a = 3.687 A, c = 33.55 A at RT. 
Nr. 7A-14 BaBi4Ti 4 O lB 



61S1S 
61S15 



la 



Dielectric anomaly associated with a phase transition was reported independently by 
Subbarao*) and by Smolenskii*) in 1961. Ferroelectric activity was reported in- 
dependently by Fang et ai. in 1961 c ). 



phase 


ii 


I 


state 


F 


P 


crystal system 


orthorhombic 
(or pseudo-orthorbombic) 


tetragonal 


e 


375 °C 
395*) °C 



q « 5.7 • 10 8 kg m" 3 . 
a = 5.461 A, b\a = 1.000, c = 41.85 A at RT. 



Crystal structure: Fig. 890. 



Dielectric constant: Fig. 891. x = 150 at RT. 
n . CI(T - B p ). C = 2.5 ■ 10 s % 9 V = 335 °c. 



Piezoelectric constant; g 2.3 - 10~ n C N" 1 . 



*)61S15 
°)61F7 



61F7 

*)61S15 
62S15 



61S15 



62S17 



Switching: Fig. 892; Tab. 105. 

Tab 105 BaBLTi-Ois, Ba^Bi/TitOu, Bi 4 Ti,0 lft , BaTiO a (for comparison). Switching parameters in 
_? • ...:4.-u ^ t3*t;a r/C9J7n t = t~ pvr>( 4-*!F) L = switching time 





BaTi0 3 


Bi 4 Ti s O„ 


BaBi/T^O^ 


BajBi^Ojg 




a 


6.1 


41 


23 


76 


10 5 Vm" 1 




0.4 


io- a 


1.5 


io-» 


[i sec 



Nr.7A.-15 PbB^Ti^O!: 



5a 



7a 



Dielectric anomaly associated withaphase transition was reported by SuBBAHAoinl961. 
phase 



state 



crystal system 



II 



orthorhombic 
(possibly) 



tetragonal 



570 °C 



e - 6.6 • 10-* kg m-*. 

a = 5.437 A, bja = 1.000, c = 41.35 A at RT. 



Dielectric constant: Fig. 893. x = 220 at RT. 
x - CUT - Q P ). C = 1.4 • 10 5 °C Qp - 552 °C. 
Piezoelectric constant: <f M = 2.3 • 10" u C N _1 . 



61S15 
62S17 



62S17 



Nt. 7A-16 SrBi^Ti^Ou 



Dielectric anomaly associated with a phase transition was reported by Subbarao in 1 961 . 



state 



crystal system 



G 



II 



orthorhombic 
(possibly) 



tetragonal 



530 °C 



p — 5.2 * 10» kg m-». 

a = 5.428 A, b/a 1.000, o = 40.95 A at RT. 



Dielectric constant: Fig. 894. x » 190 at RT. 
N = C/(T - 6p). C « 0.68 * 10* °C, © p = 485 °C. 



Piezoelectric constant: d„ = 1.5 * lO" 12 C N" 1 . 



61S15 



61S15 



62S17 
62S15 



62S17 



62S17 



Furuhata/Nomufa 



111 



Figuren S. 379n\ 



II 7 Oxide mit Schichtstruktur 



Nr, 7A-17 CaBi«Ti 4 0 lf 



la 
b 



5a 



CaBLTi^O^ was investigated by Subbarao in 1962. 
No dielectric anomaly has been detected. 

Orfhortombic: a = 5.418 A, bja = 1.002, c = 40.75 A at RT. 
Q = 4.7 ♦ 10* kg m~ 3 . 

Dielectric constant: Fig. 895. x = 120 at RT. 



Nr. 7A-18 BisTi.GaOjg 



la 
b 



BigT^GaOjg was investigated by Subbarao in 1962. 
No dielectric anomaly has been detected. 

Orthorhorabic: a = 5.408 A, bja = 1.006, c = 41 05 A at RT 
6 - 7.3 - 10» kg m-*. 



62S17 
62S15 



61S11 



62S17 
62S15 



5a 



Dielectric constant: x = 150 at RT. 



Nr.7A-19 Ba^VTisOu 



62S17 



14b 



Ferroelectric activity of Ba^Ti^ was observed by Aurivtluus in 1962. 



phase 



state 



crystal system 



orthorhombic 



tetragonal 



325 °C 



a = 5.527 A ( b = 5.514 A, c = 50.37 A at RT. 



Crystal structure: Fig. 896; Tab. 106. 



Temperature dependence of lattice param eter : Fig. 897. 

Dielectric constant: Fig. 898. 
** = 360, «" = 22 at RT. 

Remanent polarization: P r = 2 - 10~ s C m _s at RT 
Coercive field: £ e = 1.0 • 10° V m-i at RT. 



Switching: see Fig. 892; Tab. 105. 



Tab. 106. J^gVTijOtf. Fractional coordinates of atoms 
\62A5\ Space group of I4/mmm was assumed. 



I4/mmm 



4Bi 

4 (Bi. Ba] 
4 (Bi, Ba] 
2Ti 
4Ti 
4Ti 
40 
40 
40 
40 
40 
80 
80 



Nr. 7A-20 Pb^Ti^g 



in 4(e) : 
in 4(e) : 
in 4(e): 
in 2(b) : 
in 4(e) : 
in 4(0 : 
in 4 c) : 
in 4(d) : 
in 4(e) : 
in 4(e) : 
in 4(e) : 
in S(g): 



(0, 0,0; 1/2, 1/2, 1/2) + 



:fc0. 0, z: 
±0, 0, 1/2 



0, 1/2,0; 1/2, 0,0 
0, 1/2, 1/4; 1/2, 0, 1/4 



±(0, 1/2, z\ 1/2, 0, *) 



z = 0.2255 
z = 0.0420 
z = 0.1300 

z = 0.3370 
* = 0.4185 



* = 0.2962 
z - 0.3378 

* = 0.4593 
z = 0.0815 

* = 0.1630 



Ferroelectric activity in Pb 2 Bt 4 Ti 5 0 18 was observed by Subbarao in 1962. 
phase ii t 



62 A 5 



62 A 5 
6315 



62 A 5 
62 A 5 



state 



crystal system 



orthorhombic 
(possibly) 



tetragonal 



310 °C 



e = 6.6- 10*kgm-». 

a = 5.461 A, bja = 1.000, c = 49.70 A at RT. 



112 



62S17 



62S17 
62S1S 



Furuhata/Nomura 



II 7 Layer-structure oxides Figures p. 380 £f. 



5a 



7a 



Dielectric constant: Fig. 899. x = 400 at RT. 
x = C/(T - G p ), C - 4.1 • 10* °K, 0 p = 280 °C 

Spontaneous polarization: P B = 6 • 10" a C m- s at 235 °C. 



Piezoelectric constant: d 3i = 2.5 • 10"" C N" 1 . 



62S17 
62S17 



62517 



Nr. 7A-21 SraB^TisO^ 



la 



b 


phase 


II 


I 




state 


F 


P 




crystal system 


orthorhombic 
(possibly) 


tetragonal 



5a 



Ferroelectric activity in S^B^l^O^ was observed by Subbarao in 1962. 



e 285 °C 

e = 5.3 ■ 10* kg m~ 5 . 

a = 5.461 A t b/a = 1.000, e = 48.80 A at RT. 



Dielectric constant: Fig. 900. x = 280 at RT. 
x ^ ci(T - 9 P ). C = 0.47 • 10* °K, 0 p = 255 °C 

Spontaneous polarization: P s = 3.5 * 10-* C m" 8 at 255 °C 



Piezoelectric constant: i M = 2.5 • 10~" C N" 1 . 
Nr. 7A-22 BisTi^On 



62S17 



62S17 
62S15 



62S17 
62S17 



62S17 



Dielectric anomaly associated with a phase transition was observed in Bi^On by 
Subbarao in 1962. 

phase III II 



crystal system 



space group 



9 



monoclinic 



C2/c-q h 



monoclinic 



C2/m-C8 



250*) 



1200a) 



o = (6.12 ± 0.02) • 10" kgm- 3 . 

a = (14.612 ± 0.006 )A # b = (3.799 ± 0.004) A, c = (14.946 ± 0.006) A, 
p = (93.13 ± 0.01)° at RT. 



Crystal structure: Z = 2 in phase II. Z = 4 in phase III. Fig. 901, 902; Tab. 107. 



Thermal expansion: Fig. 903. 



Dielectric constant: Fig. 904. 

No hysteresis loops could be obtained between 25 °C and 290 °C. 

Tab. 107. BijT^O^. Atomic parameters at RT [65 J 4] 



62S16 
65] 4 



*)62S16 

65J4 
65 J 4 



65J4 



62S16 



Atom 


X 


y 


z 


0(1) 

0(2) 

0(3) 

0(4) 

0(5) 

0(6) 

Ti(l) 

Ti(2) 

Bi 


0.0 

0.1828 ± 0.0024 
0.1408 ± 0.0024 
0.0814 ± 0.0024 
0.2662 ± 0.0024 
0.0546 ± 0.0024 
0.0530 ± 0.0006 
0.1461 db 0.0006 
0.3211 ±0.00015 


0.262 ±0.012 
0.246 ± 0.007 
0.256 ±0.007 
0.760 ± 0.007 
0.747 ± 0.007 
0.770 ± 0.007 
0.250 ± 0.002 
0.759 ± 0.002 
0.1747 ± 0.0005 


0.250 

0.2207 ± 0.0024 
0.0338 ± 0.0024 
0.1259 ± 0.0024 
0.0880 ± 0.0024 
0.9221 ±0.0024 
0.1406 ± 0.0006 
0.0162 ± 0.0006 
0.1798 ± 0.00015 



Thermal parameter B =0.33 A 8 for all atoms. Coordinates and standard deviations in cell fractions. 



7B Complex compounds and solid solutions 

Nr.7B-l Bis-^Mel+Ti^xNbj^Os (Me*+ = Ba, Sr, Pb) lb 



Nr. 7B-2 Bi^xMci+T^NbsOu (Me s + = Ba, Sr, Pb) 



5 * 
lb 



Lattice parameter: Fig. 905, 
Transition temperature: Fig. 906. 



Dielectric constant : Fig. 907. 

Lattice parameter: Fig. 908. 
Transition temperature: Fig. 909. 



Dielectric constant : Fig. 910. 



The unit cell of phase II has about half the volume of the unit cell of phase UI. 



DuutoHUitnutein, Neuu Scrie I If/3 



Furuhata/Nomura 



113 




Figuren S. 382ff. II 7 Oxide mit Schichtstruktur 



Nr.7B-3 Nao.aB^.jTi^O^ 




la 


Dielectric anomaly associated with a phase transition was reported by Subbarao in 
1962. 


62S17 


b 


phase 


II 




I 






state 




P 






crystal system 


orthorhoinbic 


tetragonal 


62S17 




G 


650 °C 






e = 6.3 • 10* kg m" 8 . 

a - 5.427 A. bla = 1.006. c = 40.65 A at RT. 


62S1S 


5a 


Dielectric constant: Fig. 911. x 
x = C/(T-e p ), C -0.79 -10 s 


= 200 at RT. 
°K, © p = 610 °C. 


62S17 




Piezoelectric constant: d u ~ 1.0 


. 10-" C N" 1 . 


62S17 


Nr.7B-4 K M K 4 . t Ti t O u 








la 


Dielectric anomaly associated with a phase transition was reported by Subbarao in 
1962. 


62S17 


b 


phase 


II 




I 






state 




P 






crystal system 


orthorhombic 


tetragonal 


62S17 




& 


550 °C 






q = 6.7 • 10» kg m-*. 

/r — 6M\ A fc/* - 1.004. c » 41.15 A at RT. 


62S15 


5a 


Dielectric constant: Fig. 912. % 
* = C/(r - © 0 ), C = 0.74 • 10 8 


= 140 at RT. 
•K, 0 P « 515 °C. 


62S17 


7a 


Piezoelectric constant: <*„ = 1 *° * l0_U c N ~ l - 


62S17 


- - — «- ™ ™u o _j n>K «, AKiJfsJh-O. lb 1 Transition temperature: Fig. 913. 










5 1 Dielectric constant: Fig. 914- 


Nr. 7B-6 (l-aOBi^TijOia - acBaTiOj 




5 | Transition temperature: Fig. 915. 


Nr. 7B-7 B^+xPb^Tii-^Ga^OiB 








la 


Another formula for this soUd solution is (1 - *)PbBi«Ti<0 16 • jrB^T^GaO^. Prop- 
erties of this solid solution were studied by Subbarao in 1962. 


62S17 


b 


x = 0.25: 
phase 


II 




I 


62S17 




state 




P 






crystal system 


orthorhombic 
{pseudo-tetragonal) 


tetragonal 






e 




600 °C 






Pseudo-tetragonal cell parameter : a = 
Dielectric constant: x = 180 at RT; x 


3.842 A, c = 41.40 A at RT. 
= 3035 at 6>. 






x = 0.5: 
phase 


II 




I 


62S17 




state 




P 






crystal system 


orthorhombic 
(pseudo- tetragonal) 


tetragonal 






9 




620 °C 






Pseudo-tetragonal cell parameter: a = 
Dielectric constant: x = 179 at RT; x 


3.842 A,c = 41.40 A at RT. 
« 1930 at 6. 





Furuhata/Nomuta