GB/T 14634.7-2010 English PDF

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GB/T 14634.7-2010: Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 7: Determination of temperature quenching
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14634.7-2010	149	Add to Cart	2 days	Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 7: Determination of temperature quenching	Valid

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Basic data

Standard ID: GB/T 14634.7-2010 (GB/T14634.7-2010)
Description (Translated English): Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 7: Determination of temperature quenching
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 5,548
Date of Issue: 2010-08-09
Date of Implementation: 2011-05-01
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 the determination of rare earth trichromatic phosphor lamps with heat quenching nature. This section applies to light with three color phosphor thermal quenching Determination of rare earths.

GB/T 14634.7-2010: Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 7: Determination of temperature quenching

---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.
Test methods of rare earth three-band phosphors for fluorescent lamps Part 7. Determination of temperature quenching ICS 77.120.99 H14 National Standards of People's Republic of China Test methods of rare earth trichromatic phosphor lamps Part 7. Determination of thermal quenching Part 7. Determinationoftemperaturequenching 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 7. This part of the National Standardization Technical Committee rare and centralized. This section is responsible for drafting units. Jiangmen City Branch Hang Industrial Co., Ltd.. Participated in the drafting of this section. Xiamen Topstar New Materials Co., Ltd. Hangzhou Daming fluorescent material. The main drafters of this section. Hoang Thuy sweet, Chen Rao, Wen Chun Joan. Test methods of rare earth trichromatic phosphor lamps Part 7. Determination of thermal quenching

1 Scope

GB/T 14634 provisions of this part of the light rare earth trichromatic phosphors Determination of thermal quenching. This section applies to three-color phosphor lamp thermal quenching Determination of rare earths.

2 principle of the method

Quenching using thermal analysis system to 253.7nm as the excitation wavelength, relative luminance samples tested at room temperature, chromaticity coordinates, and The sample was placed in 200 ℃ constant temperature of the sample chamber until the temperature reaches 200 ℃ and re-heated 20min, once again test specimen relatively bright Degrees, chromaticity coordinates, compared with the value of the test at room temperature, it is determined (or calculated) relative luminance, thermal quenching of chromaticity coordinates.

3 instruments and apparatus

3.1 Analysis of thermal quenching system. the spectral range of 200nm ~ 800nm; maximum operating temperature of the temperature control device is not lower than 250 ℃, accuracy ± 1.5%. 3.2 Oven. with hot air circulation. 3.3 Sample dish. made of stainless steel, the inner diameter of 20mm ± 0.5mm, depth 3.0mm ± 0.1mm.

4 Sample

Samples should be tested at 105 ℃ 2h drying in an oven (3.2) and placed in a dry environment cooled to room temperature alternate.

5 test procedure

5.1 Instrument calibration Refer to the instrument manual for instrument calibration. 5.2 Testing 5.2.1 The test sample (4) into the tray (3.3), the sample plane of glass will flatten after that the sample pan and the weight of each phosphor Compaction rate convergence, into the sample chamber. 5.2.2 Setting the sample chamber temperature 25 ℃ ± 2 ℃, in order to coordinate 253.7nm as the excitation wavelength, the relative brightness of the test sample (B0), chromaticity (X0, y0), the test is completed, remove the sample. 5.2.3 Setting the sample chamber temperature of 200 ℃, until the instrument reach the set temperature and the thermostat 20min after the sample has been taken into until the temperature And again reaches 200 ℃ after 20min constant to 253.7nm as the excitation wavelength, again test the relative brightness of the sample (Bq), chromaticity sit Standard (xq, yq) values, and compared with the value at room temperature (25 ℃) under test.

6 Test results are expressed

6.1 according to equation (1) to calculate the relative brightness of thermal quenching of ΔBq, two parallel determination of the relative brightness of the thermal quenching of the difference is not more than 1%, whichever The average value. ΔBq = Bq-B0B0 × 100 (1) Where. ΔBq --- thermal quenching of the relative brightness (%); ......

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