Lead Free Piezoelectric Elements
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
Piezo Element,Piezo Ceramic Elements,Piezoelectric Ceramic,Pzt Tubes Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com
The U49 with its "quality" and "appearance" as its core competitiveness, adopts a 4K LG Display IPS hard screen, which can more accurately adjust the color density and brightness of a single pixel; U49 adds white sub-pixels, the passage of light The rate will be greatly enhanced to enhance color expression. The viewing angle of the screen has reached 178 degrees, and the color distortion will not appear when viewed from any angle. In addition to excellent screen quality, KKTV has adopted a new generation of color LED technology for U49. The toner has reached the micron level and achieved high color gamut display of more than 85%. At the same time, it carries the independently developed color wheel engine processing technology, 12bit data speed Processing, real-time color dynamic compensation, making the picture more realistic colors. 
According to reports, KKTV U49 will be officially launched at 0 o'clock on November 5. In order to give back to the consumers, the manufacturers also introduced a series of attractive preferential policies: the first 200 TV orders as low as 2599 yuan, 200-1000 orders for only 2799 yuan, and a rich gift gift. At present, U49 in this hot appointment has gathered a lot of popularity, and it is bound to become the first choice for young people's living room TV.
KKTV Releases 4K Ultra-clear TV U49 vs. Dual 11 Price $2999
The much-anticipated Double 11th Carnival Shopping Festival is about to officially begin, and many of the friends' shopping carts are full of “exotic treasuresâ€. For many small partners who are interested in buying appliances, they are also waiting for the "second kill" and expect to show off at 0:00 on November 11. However, the ideal is very full, but the reality is very skinny. Every year, double 11 will always have thousands of netizens grab a commodity, and finally grab a day but it is harvested. Just as the major home appliance makers were preparing for the double 11s, there was a brand that "runs away." Konka's Internet smart TV brand KKTV, in order to allow more users to buy high-quality TV, will be the first to launch 4K ultra-high-definition TV U49 in Jingdong Mall on November 5, rob thousands of consumers in the living room.
Login to Jingdong Mall KKTV TV flagship store, will be officially launched on November 5th U49 is making an appointment, and the appointment is very hot. Manufacturers will position this 4K ultra-high definition television as the "second TV for young people," priced at 2,999 yuan, starting with a minimum buy price of 2599 yuan, regardless of configuration or price are extremely competitive in the market.
From the KKTV U49 appearance performance point of view, this 4K ultra high definition TV is very thin, the border uses a narrow edge design, only 1.1cm1.08cm, make the screen look bigger, the viewing experience will be more comfortable. In addition to the narrow side, U49 continues the KKTV brand's excellence in detail. The base adopts a double V shape, and a more creative ground scrub process. This not only allows the base to have a stronger grip, is less likely to fall over, and also has a chemical reaction with the TV body. In tacit understanding, the whole looks simple and atmospheric.