In Macau, where have you ever been?

There are many friends who have been to Macau. I only went once. What shopping strategy, ah, travel guides, food strategies. I wouldn’t get a hatchet.

All photos from Macau come from sony black card m3.

The performance of the black card m3 will not be described again.

Sony (SONY) DSC-RX100 M3 black card digital camera 2010 effective pixels equivalent 24-70mm F1.8-2.8 Zeiss lens (WIFI/NFC) 4399 yuan the same size of the best quality card machine Jingdong direct link to Wikipedia

First of all, it is not possible to exempt the photos of one of the top three buses and go to one of the standard photographs in Macau.

Second, the egg shines.

Next, we don't waste everyone's traffic, we don't waste pages, and we don't waste everyone's time.

Then there are only photos.

Like a garden

panoramic

Like a playground

Like a flower cellar

Like a park

There is female security? No, this is a real policeman, armed with weapons.

There is police brother

Missed piano solo time

Did not miss the band

Pots larger than tables

Macao tiles

Dining?

I know this is definitely a meeting room

Presumably I must have guessed where it is.

The next three photos are no longer inserted text.

The luck of the trip to Macau was good.

The appendix, irrelevant to the content of the title, was seen ten years ago in Wangfujing, Beijing.

The above two photos are Wangfujing, Beijing in 2006

The two photos are the Big Car Museum in Macau.

Grand Racing Museum near Macao Polytechnic Institute

Unfortunately, we didn't have time to go in the game. Fortunately, on the day we left Macau, we began to hang the No. 1 typhoon.


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