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A kind of low melting point inorganic solid binder and preparation method thereof

A technology of inorganic solids and binders, which is applied in the manufacture of inorganic binders, adhesives, and cold cathodes. It can solve problems such as deterioration of the appearance of the lamp tube, cracking of the powder layer, and decrease in luminous flux, and achieve easy operation and reliable quality. , good uniformity

Inactive Publication Date: 2011-12-07
JIANGMEN KANHOO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For ring and double-D lamps that need to be bent after powder coating, it is not enough to just add ultra-fine particle size alumina, otherwise, powder removal and cracking of the powder layer will occur at the bend of the glass tube. Disadvantages make the appearance of the lamp worse, the luminous flux decreases, and the light decay increases

Method used

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  • A kind of low melting point inorganic solid binder and preparation method thereof
  • A kind of low melting point inorganic solid binder and preparation method thereof

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preparation example Construction

[0027] The preparation method of above-mentioned inorganic solid binder, comprises the following steps

[0028] 1) Dissolving the raw materials containing calcium, barium or boron respectively, and then mixing to obtain solution A;

[0029] 2) dissolving the phosphorus-containing raw material to obtain solution B;

[0030] 3) Mix solution A with solution B, and add ammonia water;

[0031] 4) Heat to 80-90°C and stir until a white precipitate is formed;

[0032] 5) Adjust the pH of the solution to 7-8, and stir for 1-3 hours;

[0033] 6) Dehydrate the obtained white precipitate, dry it, and burn it at 240-450°C;

[0034] 7) Crushing, washing, and drying the burnt matter to obtain an inorganic solid binder.

[0035] Preferably, the raw material containing calcium, barium or boron is a water-soluble raw material, most preferably calcium nitrate, barium nitrate, boric acid.

[0036] Preferably, the phosphorus-containing raw material is a water-soluble phosphate, the best bein...

Embodiment 1

[0043] CaO 0.5BaO 0.3P 2 o 5 0.5B 2 o 3 preparation of

[0044] 1) Take Ca(NO 3 ) 2 .4H 2 O 236.1 g, Ba(NO 3 ) 2 130.6 grams, H 3 BO 3 64.9 grams were dissolved in 1 L of deionized water respectively, and mixed to obtain solution A;

[0045] 2) Take (NH 4 ) 2 HPO 4 83.1 grams were dissolved in 1 L of deionized water to obtain solution B;

[0046] 3) Solution A is mixed with solution B, and 0.1 L of ammoniacal liquor with a mass concentration of 25% is added;

[0047] 4) Heat to 80°C and stir until white precipitate appears;

[0048] 5) adjust the pH of the solution to be 8, and continue to stir for 1 hour;

[0049] 6) Dehydrate the obtained white precipitate, dry it, and burn it at 250°C for 2 hours;

[0050] 7) Crush the burnt material to the desired mesh size, wash and dry to obtain an inorganic solid binder.

[0051] figure 1 It is the DTA figure of embodiment 1 product; figure 2 is its TG graph, from figure 1 , It can be seen in 2 that the onset m...

Embodiment 2

[0053] 1.1CaO 0.2BaO 0.25P 2 o 5 0.6B 2 o 3 preparation of

[0054] 1) Take Ca(NO 3 ) 2 .4H 2 O 259.7 g, Ba(NO 3 ) 2 52.3 grams, H 3 BO3 77.9 grams were dissolved in 1 L of deionized water respectively, and mixed to obtain solution A;

[0055] 2) Take (NH 4 ) 2 HPO 4 69.3 grams were dissolved in 1 L of deionized water to obtain solution B;

[0056] 3) Solution A is mixed with solution B, and 0.1 L of ammoniacal liquor with a mass concentration of 25% is added;

[0057] 4) Heat to 90°C and stir until white precipitate appears;

[0058] 5) Adjust the pH of the solution to 7.5 and continue to stir for 2 hours;

[0059] 6) Dehydrate the obtained white precipitate, dry it, and burn it at 350°C for 1.5h;

[0060] 7) Crush the burnt material to the desired mesh size, wash and dry to obtain an inorganic solid binder.

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Abstract

The invention discloses an inorganic solid binder and a preparation method thereof. The composition formula of the binder is as follows: nCaO.mBaO.xP2O5.yB2O3, wherein in the formula, n is larger than or equal to 0.8 and less than or equal to 1.1, m is more than or equal to 0.1 and less than or equal to 0.5, x is larger than or equal to 0.1 and less than or equal to 0.5, and y is larger than or equal to 0.3 and less than or equal to 1.0. The inorganic solid binder disclosed by the invention has fine particles and stable chemical property in suspension, starts to fuse at the temperature of about 300 DGE C, is completely fused at the temperature of 500+ / -50 DEG C, takes a bonding effect, and is especially suitable for a temperature interval of 500-600 DEG C in a lamp craft bake tube manufacturing process. The preparation method is a chemical coprecipitation method which has a simple production process and is easy to industrialize.

Description

technical field [0001] The invention relates to a solid binder and a preparation method thereof, in particular to a low-melting inorganic solid binder and a preparation method thereof. Background technique [0002] The quality of fluorescent lamps is determined by the control of each link in the lamp-making process and the performance and quality of various raw materials (including phosphor powder, electronic powder, tungsten wire, etc.). Phosphor coating is an important process in the production of fluorescent lamps. [0003] The binder is a main component of the phosphor suspension, and its function is to reliably stick the phosphor to the glass tube. The composition and structure of the binder affect many properties of the phosphor coating, such as the adhesion of the phosphor to the glass, the thickness of the coating, and the completeness of thermal decomposition of the polymer from the coating. [0004] In the production of fluorescent lamps, water-soluble binders ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J1/00C09D1/00
CPCC09D1/00C09J1/00H01J9/323C01B25/12C01F11/02C01P2004/82H01J5/22H01J5/32H01J9/266H01J9/40H01J61/35
Inventor 胡学芳
Owner JIANGMEN KANHOO IND
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