Qipu Optoelectronics created an outdoor DIP LED full-color display for Jintang Advertising Company. The screen area is 180 square meters, the dot spacing is 20mm, and the cabinet size is 960X960mm. After the display is successfully lit, the image is clear and beautiful, the picture is soft and beautiful, the play is stable and smooth, and the visual experience is excellent. From the display effect to the system operation, it all reflects the leading position of Qipu Optoelectronics in the LED display industry.
In the process of cooperation, Qipu Optoelectronics research and development, sales, engineering, after-sales team to do their best to complete the production, installation, commissioning work. Investors told the author that their potential customer resources and long-standing customers are very much looking forward to the LED display, and also believe that the LED large screen can bring benefits to the business.
In recent years, the domestic LED industry has achieved rapid development, but in the cold winter of the overall industry downturn, in 2012 alone, there were many LED display companies in development difficulties, but Qipu Optoelectronics not only did not drag the industry back, but also I have to rewrite the miracle of the project in the industry and I have to admire it.
(This article is a copy of Qipu Optoelectronics)
The Co-Al Co-doped Barium Titanate
Lead-free Piezoelectric Ceramics was successfully developed by Yuhai company
through repeated experiments. By Researching the influence of Co-Al Co-doping
on the structure and properties of Barium Titanate-based piezoelectric
ceramics, the formulation and preparation technology of Barium Titanate-based
piezoelectric ceramics were optimized. Yuhai`s BaTiO3 was prepared by conventional
solid-phase sintering method, with the piezoelectric constant d33 (>170pC/N),
dielectric loss tgδ≤0.5% and mechanical coupling coefficient Kp≥0.34.
Barium titanate lead-free piezoelectric
ceramics are important basic materials for the development of modern science
and technology, which was widely used in the manufacture of ultrasonic
transducers, underwater acoustic transducers, electroacoustic transducers,
ceramic filters, ceramic transformers, ceramic frequency discriminators, high
voltage generators, infrared detectors, surface acoustic wave devices,
electro-optic devices, ignition and detonation devices, and piezoelectric
gyroscope and so on.
Application: military, ocean, fishery, scientific research,
mine detection, daily life and other fields.
China Patent of Yuhai company`s BaTiO3
Chinese Patent No.: ZL 2011 1
0126758.6
Name: Lead-free Barium Titanate
Piezoelectric Material with Addition of Cobalt and Aluminum
Lead free piezo material BaTiO3
Lead-free Material
Properties
BaTiO3
Dielectric Constant
ɛTr3
1260
Coupling factor
KP
0.34
K31
0.196
K33
0.43
Kt
0.32
Piezoelectric coefficient
d31
10-12m/v
-60
d33
10-12m/v
160
g31
10-3vm/n
-5.4
g33
10-3vm/n
14.3
Frequency coefficients
Np
3180
N1
2280
N3
Nt
2675
Elastic compliance coefficient
Se11
10-12m2/n
8.4
Machanical quality factor
Qm
1200
Dielectric loss factor
Tg δ
%
0.5
Density
Ï
g/cm3
5.6
Curie Temperature
Tc
°C
115
Young's modulus
YE11
<109N/m3
119
Poison Ratio
0.33
Lead Free Piezoelectric Elements
Piezo Element,Piezo Ceramic Elements,Piezoelectric Ceramic,Pzt Tubes
Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com