GB/T 20167-2012 English PDF

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GB/T 20167-2012: Physical test method of rare earth polishing powder -- Determination of burnishing mass and scratch -- Gravimetry
Status: Valid

GB/T 20167: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20167-2012	139	Add to Cart	3 days	Physical test method of rare earth polishing powder -- Determination of burnishing mass and scratch -- Gravimetry	Valid
GB/T 20167-2006	239	Add to Cart	2 days	Physical test method of rare earth polishing powder -- Determination of burnishing mass -- Gravimetric analysis method	Obsolete

Similar standards

GB/T 20931.12   GB/T 18882.1   GB/T 18115.2   GB/T 20166.2   GB/T 20166.1   

Basic data

Standard ID: GB/T 20167-2012 (GB/T20167-2012)
Description (Translated English): Physical test method of rare earth polishing powder -- Determination of burnishing mass and scratch -- Gravimetry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 6,633
Older Standard (superseded by this standard): GB/T 20167-2006
Regulation (derived from): National Standards Bulletin No. 28 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the determination of the double-sided grinding machine polishing rare earth polishing powder erosion volume and scratches approach. This standard applies to the cerium -based rare earth -based rare earth polishing powder polishing

GB/T 20167-2012: Physical test method of rare earth polishing powder -- Determination of burnishing mass and scratch -- Gravimetry

---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.
ICS77.120.99 H14 National Standards of People's Republic of China Replacing GB/T 20167-2006 Rare earth polishing powder physical performance test method Determination of the amount of erosion and polishing scratches Gravimetric method Gravimetry Issued on. 2013-05-01 2012-11-05 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is in accordance with GB/T 1.1-2009 given rules drafted. This standard replaces GB/T 20167-2006 "rare earth polishing powder physical performance test methods throw erosion amount Gravimetric method." This standard compared with GB/T 20167-2006, the main technical changes are as follows. --- Reducing the amount of erosion measurement range throw; --- Increased determination scratch, scratch to measure the rate of increase of the "scratch rate" terms and formulas; --- Grinding equipment changed from the original yaw plane polishing machine to double-sided grinding machine. This standard by the National Standardization Technical Committee of rare earth (SAC/TC229) centralized. This standard is drafted by. Kiyomi Tianjiao Baotou rare earth polishing powder Ltd.. Participated in the drafting of this standard. Baotou Rare Earth Research Institute, Gansu Rare Earth Group Co., Ltd. The main drafters of this standard. Xie Bing, Liu Zhiwen, Cuiling Xiao, Xuyi Qin, Guo Jianxia, \u200b\u200bQin Ma, Wang fragrance, Hao Qian. This standard replaces the standards previously issued as follows. --- GB/T 20167-2006. Rare earth polishing powder physical performance test method Determination of the amount of erosion and polishing scratches Gravimetric method

1 Scope

This standard specifies the method for the determination of rare earth polishing powder polishing amount of erosion and scratches with a double-sided grinding machine. This standard applies to the determination of cerium-based rare earth-based rare-earth polishing powder polishing amount of erosion and scratches rate measurement range are. throwing eclipse amount 0.05mg/(cm2 · min) ~ 0.25mg/(cm2 · min), scratched by 0% to 100%.

2 principle of the method

Open the sample mill after water were mixed by mud pump the sample through the pulp mill circulating weighed before grinding, after glass Weight throw eclipse calculated amount. In the high-energy halogen observed number of pieces of glass to scratch, scratch rate was calculated.

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Throw erosion amount burnishingmass Under specified test conditions, achieve the required effect under the premise of the tested samples of rare earth polishing powder SF-5 glass unit time, Throw cut per unit area, in units of milligrams per square centimeter per minute [mg/(cm2 · min)]. 3.2 Scratches rate scratchrate Length was observed under high-energy halogen lamps, if they are grinding scratches SF-5 glass on the positive and negative are reflective and scratch greater than or equal glass Radius of the piece is that the glass scratches, a few scratches glass is ground to the total number of the ratio of said glass scratch rate.

4 main material and reagents

4.1 polyurethane polishing pad. thickness 2mm ~ 3mm. 4.2 glass. SF-5 type, thickness of 0.50cm, diameter 4.00cm, no pitting, open pores, point out the broken edges, smooth surface shape. 4.3 deionized water.

5 device

5.1 mill. double-sided grinding machine, adjustable speed, automatic mixing beating slurry automatic cycle. 5.2 Analytical balance, precision 0.0001g. 5.3 glass surface detection equipment. high-energy halogen lamps. 5.4 ultrasonic cleaning machine. ......

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