GB/T 14634.3-2010 English PDF

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GB/T 14634.3-2010: Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 3: Determination of thermostability
Status: Valid

GB/T 14634.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14634.3-2010	139	Add to Cart	3 days	Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 3: Determination of thermostability	Valid
GB/T 14634.3-2002	199	Add to Cart	2 days	Test methods of rare earth three-band phosphors for fluorescent lamps -- Determination of thermostability	Obsolete

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GB/T 14635   GB/T 15076.3   GB/T 15076.1   GB/T 14634.5   GB/T 14634.6   GB/T 14634.2   

Basic data

Standard ID: GB/T 14634.3-2010 (GB/T14634.3-2010)
Description (Translated English): Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 3: Determination of thermostability
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 6,693
Date of Issue: 2010-08-09
Date of Implementation: 2011-05-01
Older Standard (superseded by this standard): GB/T 14634.3-2002
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 measuring the thermal stability of light rare earth trichromatic phosphor. This section applies to light with a hot blanket rare earth trichromatic phosphor qualitative determination.

GB/T 14634.3-2010: Test methods of rare earth three-band phosphors for fluorescent lamps -- Part 3: Determination of thermostability

---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 3. Determination of thermostability ICS 77.120.99 H14 National Standards of People's Republic of China Replacing GB/T 14634.3-2002 Test methods of rare earth trichromatic phosphor lamps Part 3. Determination of thermal stability Part 3. Determinationofthermostability 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 3. This part is GB/T 14634.3-2002 "lamp test method for measuring the thermal stability of rare earth trichromatic phosphor" amendments. This section compared with the GB/T 14634.3-2002, the main changes are as follows. --- Set temperature of the furnace has been adjusted; --- Thermal stability relative brightness of the formula has been modified; --- Increasing the precision of the terms; --- Standard text made editorial changes. 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. Hangzhou Daming Fluorescent Material Co., Ltd., Shanghai Yuelong New Material Co. Ltd., Xiamen Topstar New Materials Ltd., Institute of Rare Earth New Materials Co., Ltd., Shaanxi Rainbow fluorescent materials company. The main drafters of this section. Hoang Thuy sweet, Chen Rao. The drafters of some of the participants. He Haiyan, Chen Hui new, Daisy Ling, He Tao, Wang Wu Po. This part of the standard replaces the previous editions are. --- GB/T 14634.3-2002. Test methods of rare earth trichromatic phosphor lamps Part 3. Determination of thermal stability

1 Scope

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

2 principle of the method

The empty furnace is heated to a predetermined temperature, and then into the light rare earth trichromatic phosphor sample was heated to a predetermined time at a predetermined temperature, Then removed in the air naturally cooled to room temperature. The treated samples not heat and heat-treated samples relative brightness, chromaticity Coordinate measurement, the absolute value of the difference between the two is denoted by the thermal stability of the test lamp trichromatic phosphor.

3 instruments and apparatus

Indirectly heated furnace, the maximum operating temperature of 1000 ℃. Temperature controller temperature deviation is less than 5 ℃. Furnace work area (which is a constant Temperature zone) temperature deviation is less than 10 ℃, the minimum size of 200mm × 100mm × 80mm.

4 measuring step

4.1 pairs of the furnace heating temperature. 4.2 power, its temperature rises to a set temperature uniformity (600 ℃), incubated 0.5h. 4.3 Weigh 5g sample was placed in a 30mL alumina crucible. 4.4 the crucible placed into an alumina boat, each no more than four crucibles. 4.5 with the stent placed alumina crucible boat propped up on the furnace temperature zone. 4.6 the heat treatment to a predetermined time (e.g., 0.5H), the alumina boat removed from the sub-heating furnace, natural cooling. 4.7 The relative brightness of the sample to be cooled to room temperature, measured the relative brightness or chromaticity coordinates, and with non-heat-treated samples of the same batch Chromaticity coordinates or contrast. 4.8 Calculation of the sample thermal stability.

5 test results presentation

5.1 according to equation (1) to calculate the relative brightness of the thermal stability ΔBh, two parallel determination of the relative brightness of the thermal stability of the difference is not more than 1%, whichever The average value. ΔBh = | Bh-B0 | B0 × 100 (1) Where. ΔBh --- thermal stability relative luminance (%); B0 --- unheated sample treated relative luminance (%); BH --- the heat-treated samples relative luminance (%). When two parallel determination of the relative brightness of the thermal stability of the difference is not more than 1% of the mean value. 5.2 according to equation (2), (3) calculate the chromaticity coordinates of the thermal stability Δxh and Δyh, parallel determination of the thermal stability of chromaticity coordinates were not Greater than 0.0010 when the mean value. Δxh = | xh-x0 | (2) ......

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