Method of producing blue powder for cathode ray

A technology of cathode ray and blue powder, applied in cathode ray tubes/electron beam tubes, chemical instruments and methods, discharge tubes, etc., can solve problems such as unreachable, achieve improved coating performance, reduce heat sensitivity, and excellent luminous performance Effect

Inactive Publication Date: 2008-02-27
CAIHONG GRP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the adjustment of the thermal sensitivity of the blue luminescent material was mainly determined by adjusting the amount of zinc sulfate added. The heat sensitivity of the paste during coating is far from meeting the needs of current screen manufacturers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: firstly add the aluminum sulfate of zinc sulfide quality 0.5‰, the aluminum chloride of 2‰, the sodium chloride of 1.5‰ and the sulfur of 2% to mix uniformly in zinc sulfide, make raw meal; Pack raw meal into In a high-purity quartz crucible, burn at 1000°C for 10 hours to obtain a phosphor block; after removing the oxide layer and abnormal luminescent part on the upper part of the phosphor block, add deionized water to make the phosphor block and deionized water reach a ratio of 1: The mass ratio of 1 is passed through a 100-200 mesh sieve in the state of powder slurry, and after sieving, it is introduced into a washing tank; deionized water is added to the fluorescent powder slurry introduced into the washing tank, so that the net content of phosphor powder in the slurry is equal to that of deionized water. To achieve a mass ratio of 1:6, stir for 0.2 hours; drain the supernatant after the slurry is completely settled, and keep the lower slurry; add deion...

Embodiment 2

[0008] Embodiment 2: First, add aluminum sulfate with a zinc sulfide quality of 1.2‰, aluminum chloride at 1.0‰, sodium chloride at 0.8‰ and 3% sulfur in zinc sulfide and mix evenly to obtain raw meal; put the raw meal into In a high-purity quartz crucible, burn at 800°C for 16 hours to obtain a phosphor block; after removing the oxide layer and abnormal luminescent part on the upper part of the phosphor block, add deionized water to make the phosphor block and deionized water reach a ratio of 1: The mass ratio of 1 is passed through a 100-200 mesh sieve in the state of powder slurry, and after sieving, it is introduced into a washing tank; deionized water is added to the fluorescent powder slurry introduced into the washing tank, so that the net content of phosphor powder in the slurry is equal to that of deionized water. To achieve a mass ratio of 1:6, stir for 0.6 hours; drain the supernatant after the slurry has completely settled, and keep the lower slurry; add deionized w...

Embodiment 3

[0009] Embodiment 3: firstly add the aluminum sulfate of zinc sulfide quality 2‰, the aluminum chloride of 1.5‰, the sodium chloride of 0.5‰ and the sulfur of 4% to mix uniformly in zinc sulfide, make raw meal; In a high-purity quartz crucible, burn at 1300°C for 2 hours to obtain a phosphor block; after removing the oxide layer and abnormal luminescent part on the upper part of the phosphor block, add deionized water to make the phosphor block and deionized water reach a ratio of 1: The mass ratio of 1 is passed through a 100-200 mesh sieve in the state of powder slurry, and after sieving, it is introduced into a washing tank; deionized water is added to the fluorescent powder slurry introduced into the washing tank, so that the net content of phosphor powder in the slurry is equal to that of deionized water. To achieve a mass ratio of 1:6, stir for 0.8 hours; drain the supernatant after the slurry has completely settled, and keep the lower slurry; add deionized water again to...

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Abstract

The invention relates to a making method of blue powder for cathode beam, which comprises the following steps: washing after incandescing mixture of zinc blend, sodium chloride, aluminum sulfate, sulfur and aluminium chloride till conductivity of supernatant being 100mu S/cm-700mu S/cm; fetching powder solid and ball grinding after dewatering; adding colorant after re-atomizing-pulping till being latex and adjusting acidness of slurry with hydric sulphate; re-atomizing-pulping after washing, dewatering, drying the powder and screening; adjusting the acidness of the slurry with caustic soda after adding G/A glue, silicon dioxide and zinc sulfate; adding aluminum oxide and drying to produce cathode-ray luminescent material with reduced heat sensitivity. The invention achieves to reduce the heat sensitivity when coats display screen with the luminescent powder after adding the aluminum oxide after coloring dealing with the luminescent powder. The luminescent powder with adding the aluminum oxide is an effective blue light fluorophor because of uniform grain, purifying color purity and fine luminous property, which improves screening characteristics remarkably.

Description

technical field [0001] The invention relates to a preparation method of a cathode ray luminescent material required by a color picture tube (CPT) and a color display tube (CDT), in particular to a preparation method of a blue powder for a cathode ray. Background technique [0002] Zinc sulfide silver chloride has been used as a blue luminescent material for color picture tubes for more than 30 years. Its high luminous efficiency, good chemical stability, appropriate afterglow and good color purity are highly praised by people. [0003] As we all know, in order to improve the contrast of the blue phosphor powder used in color picture tubes, pigments are added during the preparation process. requirements. For a long time, the adjustment of the thermal sensitivity of the blue luminescent material was mainly determined by adjusting the amount of zinc sulfate added. The heat sensitivity of the powder paste during coating has been far from meeting the needs of current fluorescen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56H01J29/20
Inventor 杨欣黄益鸣蔡步军苟宝峰
Owner CAIHONG GRP ELECTRONICS CO LTD
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