GB/T 5838.43-2015 English PDF (GBT5838.43-2015)

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GB/T 5838.43-2015: Phosphors -- Part 4-3: Phosphors for oscilloscope tubes and display tubes
GB/T 5838.43-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 31-030
L 90
Replacing GB/T 10308-1988, GB/T 10309-1988, GB/T 10317-1988
Phosphors - Part 4-3.Phosphors for Oscilloscope Tubes and
Display Tubes
ISSUED ON. MAY 15, 2015
IMPLEMENTED ON. JUNE 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Requirements... 5
4 Test Methods... 8
5 Inspection Rules... 9
6 Marking, Packaging, Transportation and Storage... 10
7 Contents of Order Sheet (or contract)... 11
Foreword
The GB/T 5838 Phosphors series of national standards includes the following parts.
---Part 1.Terminology;
---Part 2.Types;
---Part 3.Test Methods for Properties;
---Part 4-1.Phosphor for Black-white Picture Tubes;
---Part 4-2.Phosphor for Indicator Tubes;
---Part 4-3.Phosphors for Oscilloscope Tubes and Display Tubes;
---Part 4-4.Phosphor for Color Picture Tubes;
---Part 4-5.Phosphor for Color Display Tubes.
This Part is Part 4-3 of GB/T 5838.
This Part was drafted in accordance with the rules provided in GB/T 1.1-2009.
This Part serves as a replacement of GB/T 10308-1988 Phosphor Y1 for Oscilloscope Tubes
and Display Tubes, GB/T 10309-1988 Phosphor Y14 for Oscilloscope Tubes and Display Tubes
and GB/T 10317-1988 Phosphor Y10 for Oscilloscope Tubes and Image Display Tubes.
In comparison with GB/T 10308-1988, GB/T 10309-1988 and GB/T 10317-1988, this Part has
the following main changes.
---The three standards GB/T 10308-1988, GB/T 10309-1988 and GB/T 10317-1988 were
integrated into one standard;
---Chapters “Foreword”, “Normative References” and “Requirements” are added (see
Chapter 2 and Chapter 3);
---The content of designation is deleted from the title of the Standard;
---The requirement for the water-soluble chloride content of phosphors becomes more
rigorous (see 3.6);
---The requirement for the mass center particle size of phosphors becomes more rigorous
(see 3.5).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
Phosphors - Part 4-3.Phosphors for Oscilloscope Tubes and
Display Tubes
1 Scope
This Part specifies the requirements, test methods, inspection rules, packaging, transportation
and storage of phosphors for oscilloscope tubes and display tubes.
This Part is applicable to phosphors for oscilloscope tubes and display tubes.
2 Normative References
The following documents are indispensable to the application of this document. In terms of
references with a specified date, only versions with a specified date are applicable to this
document. In terms of references without a specified date, the latest version (including all the
modifications) is applicable to this document.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods
GB/T 31418.3-2015 Phosphors - Part 3.Test Methods for Properties
3 Requirements
3.1 Chemical Composition
Y1-G1 Zn2SiO4  Mn (zinc silicate  manganese)
Y10-B1 ZnS  Ag  Ni (zinc sulfide  silver  nickel)
Y14-YG2 ZnS  Cu (zinc sulfide  copper)
3.2 Mechanical Impurities
Contain no mechanical impurities.
3.3 Appearance
Y1 phosphors and Y10 phosphors are white powder;
Y14 phosphors is light green powder.
3.4 Density
Y1-G1 (4.10  0.02) g/cm3;
Y10-B1 (4.06  0.02) g/cm3;
Y14-YG2 (4.06  0.02) g/cm3.
3.5 Particle Size
Y1-G1, mass center particle size (d50). (3.0  1.0) m; logarithmic standard deviation (ln ).
0.45  0.10;
Y10-B1, mass center particle size (d50). (5.0  1.0) m; logarithmic standard deviation (ln ).
0.25  0.10;
Y14-YG2, mass center particle size (d50). (10.0  1.0) m; logarithmic standard deviation (ln
). 0.30  0.10.
3.6 Water-soluble Chloride Content
The water-soluble chloride content of phosphors for oscilloscope tubes and display tubes shall
not exceed 0.002%.
3.7 Crystallographic Form
Y1-G1 triangular crystal form;
Y10-B1 cubic crystal form;
Y14-YG2 cubic crystal form.
3.8 Luminous Color
Y1-G1, emits green light when excited by cathode rays or 254 nm ultraviolet light;
Y10-B1, emits blue light when excited by cathode rays or 365 nm ultraviolet light;
Y14-YG2, emits yellow-green light when excited by cathode rays or 365 nm ultraviolet light.
3.9 Chromaticity Coordinates
Y1-G1 x = 0.218  0.005; y = 0.712  0.005;
Y10-B1 x = 0.147  0.005; y = 0.080  0.005;
Y14-YG2 x = 0.275  0.010; y = 0.584  0.010.
3.10 Lumen Efficiency
Y1-G1 not lower than 38.0 lm/W;
Y10-B1 not lower than 17.0 lm/W;
The demand-side shall inspect the received products in accordance with the provisions of this
Standard. When they fail to comply with the provisions of this Standard, the demand-side shall
submit it to the supply-side within 3 months from the date of receipt of the products, and the
demand-side and the supply-side shall resolve the matter through negotiation. If arbitration is
required, it shall be conducted by a professional inspection institution jointly recognized by
both the demand-side and the supply-side.
5.2 Batch Group
The phosphors shall be submitted for acceptance inspection in batches. The phosphors products
of the same designation, and continuously produced from the same batch of raw materials under
the same conditions shall be considered as an inspection batch.
5.3 Inspection Items
The inspection items are divided into exit-factory inspection and type inspection.
5.4 Exit-factory Inspection
Each batch of phosphors shall undergo exit-factory inspection for mechanical impurities,
particle size, water-soluble chloride content, chromaticity coordinates, lumen efficiency and
afterglow time.
5.5 Type Inspection
The density and relative spectral power distribution shall be subject to type inspection. The
inspection cycle is one year.
6 Marking, Packaging, Transportation and Storage
6.1 Product Markings
On the packaging container of the phosphors, there shall be the following markings.
a) Supply-side’s name and address;
b) Product name, designation and net mass;
c) Production date and batch No.;
d) Markings that comply with the provisions of GB/T 191 for Avoid Sun Exposure, Keep
Away from Radiation and Keep Away from Rain.
6.2 Packaging
The phosphors shall be placed in clean, sealed, moisture-proof, light-proof and secure
containers.