GB/T 31968-2025Rare earth composite yttrium zirconium oxide ceramic powder (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 is required.

This document replaces GB/T 31968-2015 "Rare earth composite yttrium zirconium ceramic powder". Compared with GB/T 31968-2015, in addition to the structural adjustment In addition to editorial changes, the main technical changes are as follows.

a) The application areas of the products in the scope have been changed (see Chapter 1, Chapter 1 of the 2015 edition);

b) The number and brand of product brands have been changed (see Chapter 4, 3.1 of the 2015 edition);

c) The Y2O3 and Al2O3 contents of each grade have been changed (see 5.1, 3.3 of the 2015 edition);

d) The expression method and chemical composition content of ZrO2 and HfO2 have been changed (see 5.1, 3.3 of the 2015 edition);

e) Added the grade index for the center particle size between 0.1 µm and 0.4 µm (see 5.2);

f) The provisions on total radioactivity specific activity and specific surface area have been modified (see 5.2, 3.4 of the 2015 edition);

g) The analytical methods for Y2O3, Fe2O3, Al2O3, Na2O, TiO2 and Cl- have been changed (see 6.1, 4.2 of the 2015 edition);

h) Added the test method for total radioactivity specific activity (see 6.2.4);

i) Added “Sample pretreatment and preparation of analytical solution for determination of silicon oxide content in rare earth composite yttrium zirconium ceramic powder” (see Appendix A);

j) Added “Sample pretreatment and preparation of analytical solution for determination of chlorine content in rare earth composite yttrium zirconium ceramic powder” (see Appendix B).

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 Rare Earth Standardization Technical Committee (SAC/TC 229).

This document was drafted by: Qiandong Rare Earth Group Co., Ltd., Ganzhou Keying Structural Ceramics Co., Ltd., Jiangxi University of Science and Technology, Fujian Jinlong Rare Earth Co., Ltd., Baotou Rare Earth Research Institute, Youyan Rare Earth New Materials Co., Ltd., Guangdong Academy of Sciences Resources Used in the Rare Earth Development Institute, National Standard (Beijing) Inspection and Certification Co., Ltd., Jiangsu Borui Optoelectronics Co., Ltd., Guorui Science and Technology Rare Earth Functional Materials (Ganzhou) Co., Ltd., Youyan Resources and Environmental Technology Research Institute (Beijing) Co., Ltd., Youyan Rare Earth High Technology Co., Ltd., Xinfeng County Bao Gang Xinli Rare Earth Co., Ltd. and Beikuang New Materials Technology Co., Ltd.

The main drafters of this document are: Gong Bin, Qin Haiming, Yao Nanhong, Zhu Xiaoting, Peng Niusheng, Liu Helian, Liao Zhangquan, Li Jinhui, Zhong Lanying, Li Yongming, Ye Xinyu, Wei Laxian, Xu Huibing, Ni Haiyong, Lu Shuo, Liang Chao, Wang Weisheng, Zhang Xinnan, Zhong Xiangxi, Cui Jianguo, Ding Jianhong, Xie Shihui, Zhu Jianfeng, Hu Ting, Sun Yue, Liang Zhiyong, Pang Xiaoxiao, Peng Haoran.

This document was first published in 2015 and this is the first revision.

Rare earth composite yttrium zirconium ceramic powder

1 Scope

This document specifies the classification, technical requirements, inspection rules, marking, packaging, transportation, storage and accompanying documents of rare earth composite yttrium zirconium ceramic powder.

The corresponding test method is described.

This document is applicable to rare earth composite yttrium zirconium ceramic powders made by chemical or physical methods, used to make structural ceramics, bioceramics, electronic ceramics Porcelain, etc.

2 Normative references

GB/T 6682

GB/T 8170

GB/T 12690.2

GB/T 12690.3

GB/T 12690.7-2021

GB/T 12690.9

GB/T 17803

GB/T 20170.1-2006

GB/T 20170.2

GB/T 31057.1

GB 39176

GB/T 43358

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Categories

The product is divided into 24 grades according to chemical composition and physical properties, see Table 1 for details. The product grade representation method should comply with GB/T 17803 regulations.