China Medical University is the first one founded by the CPCmedicineColleges and universities, under the name of schools, completed the entire 25000 mile Long March of the Red Army and continued to operate during the Long March. They are one of the earliest medical universities in China to carry out Western medical college style education.

Piezoelectric materials can achieve the mutual conversion between mechanical energy and electrical energy, and are important intelligent materials that can be integrated into numerous implantable/wearable medical systems (IWMS), including ultrasound sensors, pressure sensors, and electrical stimulators. Due to the unique electromechanical properties of piezoelectric materials, they have important potential applications in self powered or wirelessly powered bioelectronics, which can avoid the use of commonly used chemical batteries with limited capacity and toxicity. At the same time, due to its good compatibility with biology, it has the potential to be applied in medicine and promote the development of "materials+medicine".

1、 Product Introduction:

The Z1-3 piezoelectric tester (static pressure coefficient d33 measuring instrument) is a specialized instrument designed to measure the d33 constant of piezoelectric materials. It can be used to measure piezoelectric ceramics with large piezoelectric constants, piezoelectric monomers and polymer materials with small piezoelectric constants, and PVDF thin film piezoelectric samples. 21-4 has expanded the D31 block, D31 thin film stretching fixture, D15 strip fixture, and D15 round tube fixture. This instrument is used in the production, application, and research departments of piezoelectric materials and piezoelectric components.

2、 Reference standards:

GB3389.4-82 "Testing Methods for Properties of Piezoelectric Ceramic Materials - Static Test of Longitudinal Piezoelectric Strain Constant d33" GB/T3389.5-1995 "Testing Methods for Properties of Piezoelectric Ceramic Materials - Disc Thickness Shrinkage Vibration Mode" GB000? Tj1.1/T3389.4-1982 "Testing Methods for Properties of Piezoelectric Ceramic Materials - Longitudinal Length Shrinkage Vibration Mode of Column" GB/T 3389.7-1986 "Testing Methods for Properties of Piezoelectric Ceramic Materials - Testing of Strong Field Dielectric Properties" GB/T 3389.8-1986 "Testing Methods for Properties of Piezoelectric Ceramic Materials - Testing of Pyroelectric Coefficient

Preface: As an energy generation unit, the HuaPDMS-100 piezoelectric material friction controlled nanogenerator testing system generates a potential difference between two thin layers of friction materials with different electrode polarities due to the frictional electrification effect in its internal circuit; In an external circuit, electrons flow between two electrodes attached to the back of a frictional material layer or between the electrodes and ground under the drive of a potential difference, in order to balance this potential difference. The power source of frictional nanogenerators can be large energy sources such as wind, water, and waves that have been recognized by people, as well as environmental random energy sources such as human walking, body movements, hand touch, and falling raindrops that have never been noticed before. It can also be the rotation of wheels, the roar of machines, and so on.

Biogenic decompression devices account for a significant proportion in the field of on-demand transient biologyPosition. However, The existing piezoelectric biomaterials are still obstacles to the development of such devices due to their difficulty in achieving large-scale crystal orientation and weak piezoelectricity. Here, the team proposes a method of confidentialityGuided by functional theory, a new strategy for synthesizing oriented and spontaneously arranged piezoelectric γ - glycine/polyvinyl alcohol (PVA) films using ultrasound assisted technology. First principles calculations The negative pressure effect of γ - glycine is due to the stretching and compression of glycine molecules caused by hydrogen bonding interactions. The synthesized γ - glycine/PVA film exhibits a piezoelectric performance of 10.4 pC N-1 and Ultra high voltage coefficient of 324 * 103Vm N-1. The biofilm has been further developed into a flexible, bioabsorbable, wireless piezoelectric ultrasound device (b-WPUE) for clinical wound modelingAmong them, b-WPUE can shorten wound healing time by about 40% and self degrade, providing a reliable method for the development of piezoelectric biofilm engineering and transient bioelectronic devices.

The ZJ-3 piezoelectric tester (static pressure coefficient d33 measuring instrument) is a specialized instrument designed to measure the d33 constant of piezoelectric materials. It can be used to measure piezoelectric ceramics with large piezoelectric constants, piezoelectric single crystals and polymer materials with small piezoelectric constants, and PVDF thin film piezoelectric samples. ZJ-4 extends the D31 block, D31 thin film stretching fixture, D15 strip fixture, and D15 round tube fixture. This instrument is used in the production, application, and research departments of piezoelectric materials and piezoelectric components.

GB/T3389.5-1995 "Testing methods for properties of piezoelectric ceramic materials - Circular thickness expansion vibration mode"

GB/T 3389.7-1986 "Test Methods for Properties of Piezoelectric Ceramic Materials - Test for Strong Field Dielectric Properties"

3、 Main functions of the product:

Measurement of piezoelectric ceramics with large piezoelectric constants

Measure the equivalent piezoelectric d'33 constant of arbitrary orientation piezoelectric single crystals and certain piezoelectric devices

Eight sets of fixtures including D31 block, D31 film stretching fixture, D15 strip fixture, D15 round tube fixture, etc

D33 measurement range:

0.1 gear: 2 to 400pC/N.

Can be used in conjunction with ZJ-D33-YP15 voltage chip machine
Error: * 1 gear: ± 2% ± 1 digit, when d33 is between 100 and 4000pC/N;

Provide piezoelectric film standard sheet: 20 * 20MM

D31 block, D31 film stretching fixture, D15 strip fixture, D15 round tube fixtureD31Block fixture, film stretching fixture (new function),Coplanar electrode function (new)
± 5% ± 1 digit, when d33 is between 10 and 200pC/N;
0.1 gear: ± 2% ± 1 digit (when d33 is between 10 and 200pC/N)
± 5% ± 1 digit, when d33 is between 10 and 20pC/N.
Resolution: × 1 gear: 1 pC/N; 0.1 gear: 0.1 pC/N.
Size: Force application device: Φ 110 × 140mm; Instrument body: 240 × 200 × 80mm.
Weight: Force application device: approximately 4 kilograms;
Instrument body: 2 kilograms.
Power supply: 220V, 50Hz, 20W.