GB/T 43788-2024Determination of silver content in silver paste for solar cells—Thiocyanate standard solution titration method (English PDF)

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 for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed and coordinated by the National Technical Committee for Semiconductor Equipment and Materials Standardization (SAC/TC203).

This document was drafted by: CEC Solar Technology (Zhenjiang) Co., Ltd., Wuxi Inspection and Certification Institute, China Electronics Technology National Institute of Standardization, Jiangsu Safetech Semiconductor Materials Testing Technology Co., Ltd., Wuxi Daqin Calibration Testing Co., Ltd., Wuxi City Analysis and Testing Co., Ltd.

The Institute of Testing, Photovoltaic Industry Technology Branch of Qinghai Yellow River Upstream Hydropower Development Co., Ltd., Yixing Product Quality and Food Safety Inspection and Testing Center, Xi'an Hongxing Electronic Paste Technology Co., Ltd., Xinjiang Xinte New Energy Materials Testing Center Co., Ltd., Shanghai Nonferrous Metals Industry Industry Technology Monitoring Center Co., Ltd., Wuxi Dike Electronic Materials Co., Ltd., Guangzhou Ruxing Technology Co., Ltd., CGN Wind Co., Ltd., Tianjin Aixu Solar Technology Co., Ltd., Trina Solar Co., Ltd., Shanghai Materials Research Institute Co., Ltd., Jinglan Optoelectronics Electric Technology (Jiangsu) Co., Ltd. and Zhejiang Hongxi Energy Co., Ltd.

The main drafters of this document are: Huang Guoping, Huang Wenhao, Wang Xiaohua, Lu Jiayan, Pei Huichuan, Shen Lifei, Qiu Yanmei, Wang Zhiqiang, Gan Mingxing, Gao Ronggang, Lu Wenfeng, He Li, Ma Yunfeng, Zhao Ying, Li Yang, Zhang Hongwang, Ouyang Jieyu, Fan Zhongyao, Yang Ercun, Huo Tingting, Ma Chongxian, Jin Guangyao, Yang Yihua.

Determination of silver content in silver paste for solar cells Thiocyanate standard solution titration method Warning---The nitric acid used in this document is volatile and corrosive. Avoid inhalation or contact with skin when using it.

Rinse with plenty of water and seek medical attention immediately if severe.

1 Scope

This document describes the method for the determination of the silver content in silver pastes for solar cells by titration with a thiocyanate standard solution.

This document is applicable to silver paste for solar cells, including front silver paste and back silver paste that conform to YS/T 612.The measurement range is silver content.

(Mass fraction) 30%~95%. Other conductive silver pastes (such as precious metal pastes for microelectronics technology) and raw silver powder for making silver pastes, etc. For reference only.

Note. When the silver content (mass fraction) of silver powder is determined by referring to the method in this document, the upper limit of the determination range is 99%.

2 Normative references

GB/T 601

GB/T 603

GB/T 8170

GB/T 9725

GB/T 14666

GB/T 17472

3 Terms and definitions

The terms and definitions defined in GB/T 14666, GB/T 17472 and YS/T 612 apply to this document.

4 Reagents or materials

4.1 The water used in the test is deionized water without carbon dioxide, prepared according to GB/T 603.Pour deionized water into a flask, boil for 10 minutes, and That is, plug it tightly with a rubber stopper filled with soda lime and cool it.

4.2 Nitric acid (rho about 1.42 g/mL). high purity.

4.3 Nitric acid solution (1.1). Prepare with nitric acid (4.2) in a volume ratio.

4.4 Sodium thiocyanate (or potassium thiocyanate or ammonium thiocyanate). analytical grade.

4.5 Ammonium ferric sulfate dodecahydrate. analytical grade.

4.6 Nitric acid solution (3.7). Prepare with nitric acid (4.2) in volume ratio.