Under the idea of ​​creating a low-carbon economy that is energy-saving and environmentally friendly, China is making a big semiconductor lighting industry cake. Liu Shiping, director of the Semiconductor Lighting Technology and Application Committee of the China Illumination Society, said that "the introduction of opinions will drive the rapid development of domestic LED lighting, drive and testing equipment industries." According to relevant agencies, in 2010, China's LED industry output value will exceed 1500. 100 million yuan; doubled the total output value in 2008, with a total output value of about 70 billion yuan in 2008.
The current situation of the semiconductor lighting industry is very good, Liu Shiping pointed out that "the opinions will promote the extension of China's semiconductor lighting enterprises to the upstream of the industrial chain, which is conducive to Chinese enterprises to win in the future competition." China is the world's largest producer of lighting sources and lamps. But the main production of low-end products, accounting for about 18% of the global market share. In the industrial chain, LED epitaxial wafers and LED wafers account for about 70% of the industry's profits, LED applications account for about 10%-20%; LED packaging is less than 10%.
Huatai Securities Research Institute has a lot of room for development. Sun Hua, an electronic components analyst, is more concerned about related companies. "Development Opinions" proposes to support leading enterprises. In the future, some leading companies in the industry will benefit, such as Sanan Optoelectronics, which produces LED epitaxy and chips. In addition, it has the ability or Companies involved in the production of core technology and equipment will also benefit, such as Tsinghua Tongfang."
At a time when China's semiconductor lighting industry is prosperous, the US securities market has already embraced the industry. US Nasdaq-listed Cree shares rose 5.36% on the 9th, closing at $39.09, the highest closing price since December 31, 2004. For Cree, which produces LED upstream chips, US analyst Christopher Brandsett is quite optimistic, setting the target price at $45 for two reasons, namely, strong demand for LCD panel backlights and general lighting applications; Cree is the first to use 4-inch wafers, etc. Process technology will lead to an increase in gross profit margin.
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. , http://www.yhpiezo.com