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GB/T 41760-2022 English PDF

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GB/T 41760-2022: Test method for spontaneous polarization of tourmaline
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Basic data

Standard ID GB/T 41760-2022 (GB/T41760-2022)
Description (Translated English) Test method for spontaneous polarization of tourmaline
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D59
Classification of International Standard 73.080
Word Count Estimation 10,146
Date of Issue 2022-10-14
Date of Implementation 2023-02-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 41760-2022: Test method for spontaneous polarization of tourmaline

---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 spontaneous polarization of tourmaline ICS 73.080 CCSD59 National Standards of People's Republic of China Test method for spontaneous polarization performance of tourmaline Published on 2022-10-12 2023-02-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Building Materials Federation. This document is under the jurisdiction of the National Standardization Technical Committee for Non-metallic Mineral Products and Products (SAC/TC406). This document was drafted by. Hebei University of Technology, Suzhou Sinoma Non-metallic Mining Industry Design and Research Institute Co., Ltd., Wudi Haixuan Ceramic Materials Co., Ltd., Xianyang Non-metallic Mineral Research and Design Institute Co., Ltd., Hebei Shensi New Material Technology Co., Ltd., Atest Century (Tianjin) Technology Co., Ltd. Ltd. The main drafters of this document. Liang Jinsheng, Ding Yan, Zhang Ming, Zhang Hong, Guo Chunsen, Jin Wei, Zhang Honglin, Li Ningxi, Pan Wei, Zheng Gengdi, Wang Lijuan, Meng Junping, Zheng Changwen, Zhang Guiyue. Test method for spontaneous polarization performance of tourmaline

1 Scope

This document specifies the method principle, equipment, test conditions, sample preparation, test steps of the test method for the spontaneous polarization performance of tourmaline procedures, results presentation and test reports. This document applies to the determination of the spontaneous polarization properties of tourmaline. Other minerals can be used by reference.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 In the absence of an external electric field and within a certain temperature range, the crystal material forms a dipole moment due to the non-coincidence of the positive and negative charge centers in the unit cell. Current polarity. 3.2 The amount of polarization charge per unit area perpendicular to the polarization axis. 3.3 pyroelectric effect For crystals with spontaneous polarization, when the crystal is heated or cooled, the spontaneous polarization intensity changes due to temperature changes, so that the A phenomenon in which surface polarized charges are generated in a certain direction of a crystal.

4 Principles of the method

The principle of charge integration method is used (see Figure 1). Within a certain temperature range, a certain mass and a certain particle size of electrical energy are induced by temperature programming. The polarized charge generated by the pyroelectric effect of the stone powder adopts a charge-to-charge conversion circuit to convert the accumulated charge into a voltage value. When the area of the and the electrode plate is constant, the output voltage change is proportional to the change of the spontaneous polarization intensity of the powder with the temperature change, and the spontaneous polarization intensity is Formula (1) and formula (2) are calculated. ΔPs=ΔU0· Cf (1)

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