HomeContactSitemapcas中文
 
About Us Research People International Cooperation News Education Papers Resources Links Societies & Publications Company
  Information Functional Single Crystals and Devices
Present Research Fields
Research Facilities
Publications
Products
Research Cooperation
Group Members
Contact us
Location:Home>Research>Research Divisions>Information Materials and Devices Research Center>Information Functional Single Crystals and Devices>Products

Products
BaTiO3 Single Crystals:
Pure BaTiO3 single crystal
Rh ion doped BaTiO3 single crystal
Ce ion doped BaTiO3 single crystal
Relaxor-Based Ferroelectric Single Crystals:
PMNT for piezoelectric devices PZNT
PMNT for electro-optic devices PINT
PMNT for pyroelectric devices  PFNT
PMNT doped with Fe or Mn ions  PSMNT
Barium Titanate Crystal:

To date, barium titanate (BaTiO3, BTO) systems has been studied with a great deal of interest since it was discovered in 1947. It is an excellent ferroelectric, electro-optic and photorefractive crystal for piezoelectric devices, self-pumped phase conjugation, four-wave mixing, hologram optical storage and many other photorefractive processes.  It has high beam-coupling gain and short beam-coupling rise time. The highest SPPC reflectivity was reported by using BaTiO3 single crystal. It can be operated at visible and near-infared regions and is good for cw four-wave mixing with milliwatts optical power. It is one of the most ideal material for basic research of ferroelectrics. Recently, people found the reversible giant electric field-induced-strain effect, which offers great potential for high strain actuator applications. Meanwhile, through domain engineering, it manifests excellent piezoelectric properties, which makes it also a promising non-lead "green" piezoelectric material.

We have produced high quality single crystal series of BaTiO3, including pure and doped BaTiO3. The Ce ion doped BaTiO3 singe crystal has a better photorefractive performance than pure BaTiO3. The BaTiO3:Rh single crystal even has an excellent photorefractive property in the near-IR region. We could also provide domain-modulated BaTiO3 single crystals, in which 90o and 180o domains and engineered domain configurations could be controlled as ordered by the customers. Thus, we could provide BaTiO3 crystals not only for optical use but also for non-lead piezoelectric use. Of course, we could also provide BaTiO3 crystals with different cuts to meet different requirements from our customers, such as 0o cut and 45o cut. Thus, our customers could use our BaTiO3 single crystals with versatile doping ion, size, cut and domain type as needed. 

Typical Product Parameters:

Crystal Structure
Tetragonal (4mm): 9oC < T < 130.5 oC
a=3.99 Å, c= 4.04 Å ,
Growth Method
Top Seeded Solution Growth (TSSG)
Melting Point
1600 oC
Density
6.02 g/cm3
Dielectric constants
ea = 3700, ec = 135 (unclamped)
ea = 2400, ec = 60 (clamped)
Index of Refraction
    515 nm     633 nm      800 nm
no   2.4921     2.4160     2.3681
ne  2.4247     2.3630     2.3235
Transmission wavelength
0.45 ~ 6.30  um
Electro Optic Coefficients
rT 13 =11.7 ±1.9 pm/V    rT 33 =112 ±10 pm/V
rT 42=1920 ±180 pm/V
Reflectivity of SPPC
(At 0 deg. cut )
50 - 70 % (max. 77%) for λ= 515 nm
50 - 80 % (max: 86.8%) for λ= 633 nm
Two-wave mixing coupling constant:
10 - 40 cm-1
Absorption loss:
λ: 515 nm   633 nm    800 nm
α: 3.392cm-1 0.268cm-1 0.005cm-1
Standard BTO Crystal Products
Refractive Grade BTO
(Fully electric poled with single domain)
size: 3x3x3 mm (2- 4 faces polished), 5x5x5 mm (2- 6 faces polished)
cut: 0 deg. cut (<001>×<001>×<001>),
45 deg. cut (<001>×<110>×<110>)
Substrate grade BTO
(multi-domains)
5x5x1.0 mm, <001> or <110> orientation, 1- 2 faces polished
10x10x1.0 mm, <001>or<110>orientation, 1- 2 faces polished

Special size and cut components are available upon request.
BTO crystal must be stored in temperature above 10 oC to avoid phase transitions inside crystal.

Relaxor-based PMNT Ferroelectric Single Crystals:

Perovskite type relaxor-based ferroelectric single crystals of lead magnesium niobate titanate (Pb(Mg1/3Nb2/3)O3-PbTiO3, PMNT) and lead zin niobate titanate (Pb(Zn1/3Nb2/3)O3-PbTiO3,PZNT) are attractive piezoelectric materials due to their excellent piezoelectric properties. PMNT single crystals with d33>2000pC/N and  k33>92%  offer great potential as the novel next-generation super-high performance piezoelectric material in a very broad range of applications, such as high-resolution medical  ultrasonic  diagnostic equipments , undersea sonars, high strain piezoelectric actuators and ultrasonic motors.

We have grown large and high-quality PMNT single crystals since 1997 using the modified Bridgman technique. Now we are in the mass production of high quality PMNT single crystals with the size of Φ55mm×80mm, and are capable to provide PMNT crystal piezoelectric elements with excellent piezoelectric performance to meet various applications. Meanwhile, we are also capable to produce other high-quality relaxor-based ferroelectric single crystals, such as PIMNT, PMMNT,PZNT.

We have also found excellent pyroelectric and electro-optic performance of PMNT single crystals after special processes. Thus, we could provide versatile relaxor-based ferroelectric single crystals to meet different application areas, such as piezoelectric devices, electro-optic modulation devices, pyroelectric devices for IR and UV detecting and imaging, and other complex effects, such as high performance magnetoelectric laminates and devices.  We are capable to meet the requirements upon request.

Typical Product Parameters:

Piezoelectric PMNT Crystal
Electro-optic PMNT Crystal
Pyroelectric PMNT Crystal
Longitudinal and thickness mode:
 
 
d33
1500~2500pC/N
no
2.620(632.8nm)
Pyroelectric coeff.
12.8×10-4C/m2K
Freq. const. N33
660 kHz×mm
Ne
2.601(632.8nm)
Dielectric const.
500  (1kHz)
Freq. const. Nt:
1800 kHz×mm
EO coeff. r33
70 pm/V
Dielectric loss
<0.5% (1kHz)
k33
90~94%
r13:
25 pm/V
Specific heat c
2.5×106J/m3K
kt
58~62%
rc
44.4 pm/V
Thermal diffusivity
3.8×10-7m2/s
ε33T
5000~7000(1kHz)
Absorption Edge:
400 nm
Current response Fi
5.12×10-10Am/W
tanδ
<0.7%(1kHz)
Transmission:
70%
Voltage response Fv
0.11 m2/C
Lengthwise mode
Reflection Loss:
20%
Detectivity figure Fd
10.2×10-5Pa-1/2
-d31
1800~2500 pC/N
Work threshold:
160 ºC
Work threshold
90 ºC
Freq. const. N31
520 kHz×mm
 
 
 
 
k31
92~95%
 Density
 8.1 g/cm3 (RT)
Shear mode
Size
Wafer: max: 40×40mm (50mm for one dimension)
d15
5000~7000 pC/N
 
Bulk: 30×30×30mm(40mm for one dimension) 
Freq. const. N15
1200 kHz×mm
Note: Special shape, size and cut components are available upon request.
k15
94~97%
 
Electric-field induced strain
 
 
 
Linear strain:
0.37%(2kV/mm)
 
 
Maximum strain:
1.8%  (7kV/mm)
 
 
Work threshold
85 ºC
 
 

Our group also grows ternary PIMNT single crystal.

The photo of the grown PIMNT single crystal (2 inches).

Relaxor ferroelectric single-crystal PIMNT exhibits ultrahigh piezoelectric response with high piezoelectric constant d33 of ~ 2000 pC/N, large electromechanical coupling coefficient k33 of 90%, and giant strain of ~1.7% along the <001> direction. Besides, it also owns high depolarization temperature and large coercive field which is favorable for large-power and high sensitivity devices. All these make PIMNT become a new generation piezoelectric material for applications in underwater transducer (projector or hydrophone), medical ultrasonic transducer, sensors, and actuators, which could lead to a substantial improvement in the bandwidth and power density of the transducers. Furthermore, it also possesses excellent pyroelectric properties, which also become a potential for designing and fabrication of next-generation high performance pyroelectric sensors.

Dielectric, ferroelectric, and piezoelectric properties of the PIMNT single crystal

Tc

(℃)

Trt

(℃)

Ec

(V/mm)

ε33

(1 kHz)

tanδ

(1 kHz)

d33

(pC/N)

kt

>170

>100

>500

>5000

<0.007

>1500

>0.57

Other ferroelectric single crystals:

   
 PZNT           PMMNT          PFNT        PSMNT
     
    PMMNT           PFMNT           NBBT (TSSG)        NBBT (Bridgman)
 
Copyright © SHANGHAI INSTITUTE OF CERAMICS CHINESE ACADEMY OF SCIENCES ALL RIGHTS RESERVED