GB/T 14634.5-2010 English PDF

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GB/T 14634.5-2010: Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 5: Determination of density
Status: Valid

GB/T 14634.5: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14634.5-2010	139	Add to Cart	3 days	Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 5: Determination of density	Valid
GB/T 14634.5-2002	199	Add to Cart	2 days	Test methods of rare earth three-band phosphors for fluorescent lamps -- Determination of density	Obsolete

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GB/T 14635   GB/T 15076.3   GB/T 15076.1   GB/T 14634.3   GB/T 14634.6   GB/T 14634.2   

Basic data

Standard ID: GB/T 14634.5-2010 (GB/T14634.5-2010)
Description (Translated English): Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 5: Determination of density
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 6,630
Date of Issue: 2010-08-09
Date of Implementation: 2011-05-01
Older Standard (superseded by this standard): GB/T 14634.5-2002
Regulation (derived from): National Standard Approval Announcement 2010 No.3 (Total No.158)
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 method for determination of light rare earth trichromatic phosphor density. This section applies to the determination of rare earth trichromatic lamp phosphor density.

GB/T 14634.5-2010: Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 5: Determination of density

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Test methods of rare earth three-band phosphors for fluorescent lamps Part 5. Determination of density ICS 77.120.99 H14 National Standards of People's Republic of China Replacing GB/T 14634.5-2002 Test methods of rare earth trichromatic phosphor lamps Determination of density. Part 5 Part 5. Determinationofdensity Issued on. 2010-08-09 2011-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 14634 "light rare earth trichromatic phosphors Test Method" is divided into seven sections. --- Part 1. Determination of relative brightness; --- Part 2. Determination of emission peak and color performance; --- Part 3. Determination of thermal stability; --- Part 4. Electric sensing particle size distribution measurement; --- Part 5. Determination of density; --- Part 6. Determination of specific surface area; --- Part 7. Determination of thermal quenching. This is Part 5. This section is GB/T 14634.5-2002 "light rare earth trichromatic phosphors Test Method for Density Determination" amendment right. This section compared with the GB/T 14634.5-2002, the main changes are as follows. --- Adjust some analysis condition; --- Increasing the precision of the terms, adjusted the allowable difference; --- Standard text made editorial changes. Appendix A of this section is an informative annex. This part of the National Standardization Technical Committee rare and centralized. This section is responsible for drafting units. Jiangmen Branch Hang Industrial Co., Ltd.. Participated in the drafting of this section. Xiamen Topstar New Materials Co., Ltd., Shanghai Yuelong New Material Co. Ltd., Hangzhou Daming fluorescent material Ltd., Shaanxi Rainbow Fluorescent Materials, Institute of Rare Earth New Materials Co., Ltd. The main drafters of this section. Luger mountain, Huang Rui sweet. The drafters of some of the participants. Daisy Ling, Yu Shu-chun, Jin Jie, He Haiyan, Wu Wang Bao, He Tao. This part of the standard replaces the previous editions are. --- GB/T 14634.5-2002. Test methods of rare earth trichromatic phosphor lamps Determination of density. Part 5

1 Scope

GB/T 14634 provisions of this part of the lamp determination trichromatic phosphor density. This section applies to the determination of rare earth trichromatic lamp phosphor density.

2 principle of the method

At the same temperature, were measured by the proportion of known mass filled flask and no time without the addition of light rare earth trichromatic phosphors sample Water quality ethanol, anhydrous ethanol to determine the quality and volume of the pycnometer volume of the sample, the sample can be calculated based on the quality and volume Its density.

3 instruments and apparatus

3.1 Balance. accuracy 0.0001g. 3.2 Thermometer. dividing the value should be less than 0.5 ℃. 3.3 pycnometer. 25mL capacity and is equipped with a plug (see Figure 1). 3.4 vacuum. a vacuum of 0.9kPa. 3.5 water bath ultrasonic cleaner. Power 40W ~ 100W. Figure 1 Pycnometer Preparation of 4 samples The sample at (105 ± 2) ℃ drying 2h, then cooled to room temperature in a desiccator.

5 measuring step

5.1 Quality said take pycnometer, and an appropriate amount of the dried sample was loaded washed dry pycnometer (take about 8g ~ 10g), with Weighing scales, accurate to 0.001g. 5.2 to 2/3 volume of the pycnometer injecting absolute ethanol and then placed in power is 40W ~ 100W water bath ultrasonic cleaner for clearing Wash process 5min. 5.3 specific gravity bottle placed in a vacuum apparatus gradually reduced pressure, vacuum up to 0.9kPa, sustained 10min, to eliminate air bubbles. Placed under pressure 5min after injection of anhydrous ethanol to the full, stoppered, then a small amount of ethanol spill, the outer surface of the filter paper to dry pycnometer, in the days Flat on the weighing. ......

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