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XB/T 501-2020 English PDF

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XB/T 501-2020: (Lanthanum hexaboride)
Status: Valid

XB/T 501: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
XB/T 501-2020English139 Add to Cart 3 days [Need to translate] (Lanthanum hexaboride) Valid XB/T 501-2020
XB/T 501-2008English279 Add to Cart 3 days [Need to translate] Lanthanum hexaboride Obsolete XB/T 501-2008

PDF similar to XB/T 501-2020


Standard similar to XB/T 501-2020

GB/T 2968   XB/T 104   GB/T 9967   XB/T 511   XB/T 510   XB/T 509   

Basic data

Standard ID XB/T 501-2020 (XB/T501-2020)
Description (Translated English) (Lanthanum hexaboride)
Sector / Industry Rare Earth Metal Industry Standard (Recommended)
Classification of Chinese Standard H65
Classification of International Standard 77.150.99
Word Count Estimation 6,633
Date of Issue 2020-12-09
Date of Implementation 2021-04-01
Issuing agency(ies) Ministry of Industry and Information Technology
Summary This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation, storage and quality certificates of lanthanum hexaboride products. This standard is applicable to lanthanum hexaboride powder prepared by reducing lanthanum oxide with boron carbide (or pure boron), lanthanum hexaboride prepared by hot pressing and arc method, mainly used for cathode emission materials, and used in electron microscopes , electron beam welding, discharge tubes and other fields.

XB/T 501-2008: Lanthanum hexaboride

---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.
Lanthanum hexaboride Book People's Republic of China Rare Earth Industry Standard XB/T 501-2008 Replace XB/T 501-1993 Lanthanum hexaboride 2008-02-01 released Implementation of.2008-07-01 Issued by the National Development and Reform Commission of the People's Republic of China

Foreword

This standard is a revision of XB/T 501-1993 "Lanthanum hexaboride". Compared with XB/T 501-1993, the main changes of this standard are as follows. ---According to the provisions of GB/T 17803-1999 "Representation Method of Rare Earth Product Brands", the digital designation method is adopted; ---Added 1 product brand; ---The product of grade 012602 has two specifications. ring and single crystal; ---The assessment of non-rare earth impurity content in each brand has been adjusted; ---Each brand has increased the assessment index for the content of non-rare earth impurity tungsten. This standard was proposed and managed by the National Rare Earth Standardization Technical Committee. This standard was drafted by Hunan Rare Earth Metal Materials Research Institute. This standard was drafted by Baotou Rare Earth Research Institute and Beijing General Research Institute of Nonferrous Metals. The main drafters of this standard. Weng Guoqing, Liu Shuping, Yang Ruifang, Xie Ping, Yang Ping. The previous version of the standard replaced by this standard. ---XB/T 501-1993. XB/T 501-2008 Lanthanum hexaboride

1 scope

This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation and storage of lanthanum hexaboride. This standard applies to lanthanum hexaboride powder obtained by reducing lanthanum oxide with boron carbide (or pure boron), and polycrystalline hexaboron obtained by hot pressing Lanthanum and single crystal lanthanum hexaboride prepared by arc method. This product is mainly used as cathode emission material.

2 Normative references

The clauses in the following documents become clauses of this standard after being quoted. For dated reference documents, all subsequent Amendments (not including errata content) or revisions do not apply to this standard. However, all parties that have reached an agreement based on this standard are encouraged to study Is the latest version of these files available? For undated references, the latest version is applicable to this standard. GB/T 3249 Refractory metal and compound powder particle size determination method Fisher method GB/T 3850 Density determination method for dense sintered metal materials and cemented carbide GB/T 5314 Sampling method of powder for powder metallurgy GB/T 8170 Numerical rounding rules XB/T 601 (all parts) lanthanum hexaboride chemical analysis method JB/T 7905 Sampling of sintered metal materials (excluding cemented carbide)

3 requirements

3.1 The product brand and chemical composition should meet the requirements of Table 1. Table 1 Grade Chemical composition (mass fraction)/% The main component impurity content, not more than B La Fe Mg Si1) Ca Mn Cu Cr W C total 012600 31~33 Margin 0.02 0.002 0.005 0.001 0.005 0.005 0.002 0.002 0.005 012601 31~33 Margin 0.1 0.001 005 0.001 0.001 0.001 0.02 0.001 0.02 0.3 012602 31~33 Margin 0.2 0.05 0.05 0.05 0.02 0.02 0.05 0.05 0.4 1) It is acid-soluble silicon. 3.2 The shape and specifications of the product should meet the requirements of Table 2. Table 2 Grade shape Fisher particle size μm High (thick) H mm Diameter D mm Height to diameter ratio H／D no greater than Powder≤15--- Pieces- >0.5 6～40 1 Stick--6～20 2 Rod--20 ~ 40 1.5 XB/T 501-2008

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