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GB/T 37255-2018: Test method for pyroelectric coefficient of materials under DC bias field
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| GB/T 37255-2018 | English | 119 |
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Test method for pyroelectric coefficient of materials under DC bias field
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GB/T 37255-2018
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Basic data | Standard ID | GB/T 37255-2018 (GB/T37255-2018) | | Description (Translated English) | Test method for pyroelectric coefficient of materials under DC bias field | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L90 | | Classification of International Standard | 31.020 | | Word Count Estimation | 6,621 | | Date of Issue | 2018-12-28 | | Date of Implementation | 2019-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37255-2018: Test method for pyroelectric coefficient of materials under DC bias field---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method for pyroelectric coefficient of materials under DC bias field
ICS 31.020
L90
National Standards of People's Republic of China
Test method for pyroelectric coefficient of materials under bias electric field
Published on.2018-12-28
2019-11-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Building Materials Federation.
This standard is under the jurisdiction of the National Industrial Ceramics Standardization Technical Committee (SAC/TC194).
This standard was drafted. Shanghai Institute of Ceramics, Chinese Academy of Sciences.
The main drafters of this standard. Dong Xianlin, Cao Fei, Wang Genshui, Yao Chunhua, Yan Shiguang, Guo Shaobo.
Test method for pyroelectric coefficient of materials under bias electric field
1 Scope
This standard specifies the terms and definitions, principles, environmental conditions, equipment and equipment of the pyroelectric coefficient of materials under DC bias electric field.
Product, test procedure, test data processing.
This standard is applicable to the pyroelectric coefficient measurement of pyroelectric materials such as barium titanate and lead citrate under DC bias electric field.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 3389.1 iron voltage electric ceramic vocabulary
3 Terms and definitions
The following terms and definitions as defined in GB/T 3389.1 apply to this document.
3.1
DC bias voltage DCbiasvoltage
When measuring the pyroelectric coefficient of a material, the DC voltage applied to the upper and lower main surfaces of the sample to be tested.
3.2
DC bias electric field DCbiasfield
The ratio of the DC bias voltage to the thickness of the sample being measured is indicated by the symbol E.
4 Principle
The pyroelectric coefficient under the bias electric field is the polarization of the sample [(Pm)E] when the sample temperature changes under the action of the DC bias electric field (E).
The rate of change with temperature.
When the temperature of the sample changes, the polarization changes. The free charge on the surface of the sample in the original equilibrium state cannot completely shield the bound charge.
If connected to an external circuit, the current can be measured in the circuit.
The pyroelectric coefficient measuring device under the bias electric field is shown in Fig. 1. Measure the voltage value (U) across the sampling resistor (R) with a voltmeter while recording
Voltage value (U), temperature (T) and time (t). The pyroelectric coefficient under different temperature and DC bias electric fields can be obtained according to formula (1).
[(pm)E]. The pyroelectric coefficient given should indicate the DC bias electric field and the measured temperature.
(pm)E=
d(Pm)E
dT =
A ×
Dt
dT=
A×R×
Dt
dT
(1)
In the formula.
(pm) E---the pyroelectric coefficient under the electric field (E) in units of Coulomb per square meter [C/(m2·°C)];
(Pm)E---polarization intensity under electric field (E), the unit is coulomb per square meter (C/m2);
I --- pyroelectric current, the unit is An (A);
A --- sample area, the unit is square meters (m2);
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