GB/T 5838.43-2015Phosphors - Part 4-3: Phosphor for oscilloscope tubes and display tubes (English PDF)

3.1 Chemical Composition

Y1-G1 Zn2 SiO4 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/cm

3

;

Y10-B1 (4.06 ± 0.02) g/cm

3

;

Y14-YG2 (4.06 ± 0.02) g/cm

3

.

3.5 Particle Size

Y1-G1, mass center particle size (d50): (3.0 ± 1.0) µm; logarithmic standard deviation (lnsigma):

0.45 ± 0.10;

Y10-B1, mass center particle size (d50): (5.0 ± 1.0) µm; logarithmic standard deviation (lnsigma):

0.25 ± 0.10;

Y14-YG2, mass center particle size (d50 ): (10.0 ± 1.0) µm; logarithmic standard deviation (ln

sigma): 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.

6.1 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.