LG Electronics recently released two 4K TVs

LG Electronics recently released two 4K TVs Following the "Viewpoint" series LA6800 and LA8800, LG has few follow-up actions. Following the launch of the 55-inch OLDE TV 55EA9800 and a 23-inch exclusive TV built specifically for the visually impaired, recently, foreign media reported that LG is already Two new 2K TVs have been introduced in the US market, with dimensions of 65 inches and 55 inches respectively.

It is reported that the two 4K TVs have adopted a brand-new design and built-in 4.1-channel sound. In addition to the ultra-high-definition picture quality performance, the smart platform will also be further upgraded on the basis of the original. According to LG sources, 55-inch new products will be priced at 5,999 US dollars, while 65-inch products will be sold for 7,999 US dollars. In addition to the United States, these two televisions will also be listed in the United Kingdom, Russia and Australia.

Entering 2013, “Ultra High Definition” has become the key word for the TV industry. However, apart from the LG9600, an 84-inch ultra high-definition television released last year, LG has not introduced other ultra high-definition products. The advent of the above two Ultra HDTVs will probably mean LG will increase its efforts on 4K TVs in the second half of the year.

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

8



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

ρ

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

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