Under the entrustment of the Guangzhou Huangpu District Branch of the Public Security Bureau (hereinafter referred to as the “Purchasing Agentâ€), the following government procurement projects were held for public tendering, and qualified domestic bidders were invited to participate in the bidding. The relevant matters are announced as follows: 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
Guangzhou Public Security Bureau Huangpu Division Chief Zhouzhou Jinzhou Avenue Electronic Police Procurement Project (CZ2017-0027)
I. Brief introduction of bidding project
(1) Project Title: Guangzhou Police Bureau Huangpu District Chief Zhouzhou Jinzhou Avenue Electronic Police Procurement Project
(II) Item Number: CZ2017-0027
(3) Project Category: Goods
(4) Procurement Budget (Maximum Price): RMB 3,339,900.
(5) Procurement contents and requirements (including the quantity, use, brief specification description of the purchased goods or services, or a basic overview of the project, and the implemented government procurement policies):
1. Quantity: 1 item;
2. Purchasing content: Cheung Chau Island Jinzhou Avenue Electronic Police;
3. The products purchased this time are non-imported products (imported products refer to those products that have passed China Customs declaration, inspection and release into China and are produced outside China).
Second, bidder qualification requirements
(1) It complies with the conditions stipulated in Article 22 of the "Government Procurement Law." Where a branch bids, it must be authorized by the head office with legal personality.
(b) The project does not accept bids from the Consortium.
Third, public bidding documents
Publicity time: February 14, 2017 to February 21, 2017.