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A kind of led low temperature sealing glass containing al2o3

A sealing glass, B2O3 technology, applied in the field of LED low temperature sealing glass containing Al2O3, can solve the problems of difficult to meet the fast sintering of low temperature sealing, unsolved environmental protection problems, poor thermal stability, etc., and achieves low price and various sources. , the effect of process stability

Inactive Publication Date: 2019-05-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent application 201310259302.6 discloses a low-temperature lead-free glass powder and its preparation method, but another toxic substance Sb is introduced into the system, which does not solve the environmental protection problem
And patent application 201210366375.0 also discloses lead-free glass material and preparation method thereof, through Al 2 o 3 、K 2 O, Na 2 O, ZrO 2 、TiO 2 The composition design of the raw materials and other materials avoids environmental pollution, but the softening temperature range of the glass is 500~600°C, which is difficult to meet the requirements of low temperature sealing, especially the low temperature and rapid sintering of electronic components
Some low-temperature glass used for phosphor sealing also has poor thermal stability and is prone to water absorption, which leads to device aging.

Method used

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  • A kind of led low temperature sealing glass containing al2o3
  • A kind of led low temperature sealing glass containing al2o3
  • A kind of led low temperature sealing glass containing al2o3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Preparation and sealing of materials

[0033] According to the proportioning of each component of the embodiment 1 of table 1, take corresponding analytically pure raw material respectively (B 2 o 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 ), use a planetary ball mill for 24 hours to mix evenly; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, heat it to 900°C at 3°C / min, and keep it warm for 1 hour; then, take out the crucible, Pour the melt into deionized water for rapid cooling, and dry to obtain fragments of glass melt; grind and pass through a 100-mesh sieve to obtain glass powder. Mix glass powder with polyvinyl alcohol, fish oil, ethanol and toluene (80%, 2%, 1%, 10%, 7% by weight) to form a slurry, and disperse evenly in a ball mill; tape casting, natural Dry, then cut into the embryo body of the desired shape; place the embryo body on the part to be sealed, heat up at a rate of 2°C / min in an el...

Embodiment 2

[0034] Embodiment 2: Preparation and sealing of materials

[0035] According to the proportioning of each component of Table 1 Example 2, respectively take corresponding analytically pure raw materials (B 2 o 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 ), use a planetary ball mill for 24 hours to mix evenly; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, heat it to 900°C at 3°C / min, and keep it warm for 1 hour; then, take out the crucible, Pour the melt into deionized water for rapid cooling, and dry to obtain fragments of glass melt; grind and pass through a 100-mesh sieve to obtain glass powder. Mix glass powder with methylcellulose, polyvinyl alcohol, n-butanol and acetone (82%, 2%, 2%, 8%, 6% by weight) to form a slurry, and disperse evenly in a ball mill; Stretching, drying naturally, and then cutting the embryo body into the desired shape; placing the embryo body on the part to be sealed, raising the temperature in a...

Embodiment 3

[0036] Embodiment 3: Preparation and sealing of materials

[0037] According to the proportioning of each component of Table 1 Example 3, respectively take corresponding analytically pure raw materials (B 2 o 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 ), use a planetary ball mill for 24 hours to mix evenly; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, heat it to 900°C at 3°C / min, and keep it warm for 1 hour; then, take out the crucible, Pour the melt into deionized water for rapid cooling, and dry to obtain fragments of glass melt; grind and pass through a 100-mesh sieve to obtain glass powder. Mix glass powder with epoxy resin, polyacrylamide, isopropanol and toluene (84%, 1.5%, 0.5%, 9%, 5% by weight) to form a slurry, and disperse evenly in a ball mill; casting Forming, drying naturally, and then cutting into the embryo body of the desired shape; place the embryo body on the part to be sealed, heat up at a rate of 2°...

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Abstract

The invention discloses Al2O3-containing LED low-temperature seal glass and preparing and using methods thereof. The glass is composed of B2O3, Bi2O3, ZnO and Al2O3 according to a molar ratio of 30-50:30-50:5-25:5-30. AlO4 tetrahedron is introduced through Al2O3, and structural similarity is utilized to stabilize BO4 hetrahedron, so that network stability of the glass is enhanced, and thermostability of the glass is improved; the glass can maintain high stability in hot water at 80 DEG C for 1000h. By introducing high-concentration B2O3 and Bi2O3 and maintaining a molar ratio of the same to 1:1 to give synergism of the two into play, softening temperature range of the glass is lowered to 380-435 DEG C; ZnO can adjust thermal expansion coefficient of the glass and can further improve seal performance of the glass. The glass is suitable for LED fluorescent powder seal, electronic materials and other low-temperature seal fields. The raw materials for preparation are simple and easy to get, the preparation method is simple and feasible, cost is low, and the glass is stable in performance and meets practical and industrial requirements.

Description

technical field [0001] The invention belongs to the field of sealing glass, in particular to an Al-containing 2 o 3 LED low-temperature sealing glass and its preparation and use method. Background technique [0002] Low-temperature sealing glass (sealing temperature <600°C), due to its good heat resistance, chemical stability, and high mechanical strength, is widely used in electronic paste, electric vacuum and microelectronics technology, energy, aerospace, automobiles, etc. Fields, such as phosphor sealing in light-emitting diodes (LEDs), the performance of the sealing material directly leads to the actual performance of the battery. Sealing glass can also be used for mutual sealing between glass, ceramics, metals, and semiconductors. However, currently domestic and foreign research generally uses sealing materials containing Pb, which will pollute the environment. Since Bi and Pb are adjacent in the periodic table of elements and have similar physical and chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/24C03C3/145
CPCC03C3/145C03C8/24
Inventor 张腾苏鸿斌
Owner FUZHOU UNIV