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Leadless low-melting glass production method

A low-melting point glass and production method technology, applied in the field of materials, can solve the problems of difficult mother liquor handling, environmental and safety impacts, poor product stability, etc., achieve material stability, reduce sealing temperature, and enhance stability.

Inactive Publication Date: 2011-04-06
贵州威顿晶磷电子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the products produced by such methods are not stable
Shaanxi University of Science and Technology Guo Hongwei, Yao Lili and others applied for the invention patent of "a preparation method of composite phosphate sealing glass", which can improve the stability of the product, but the method will produce a large amount of organic solvents containing inorganic acids, mother liquor Difficult to handle, the environment and safety will be affected to a certain extent

Method used

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  • Leadless low-melting glass production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for producing lead-free low-melting glass, comprising the following steps:

[0022] (1) Preparation of glass front matrix:

[0023] a. Measure raw materials according to the following quality:

[0024] Na 4 P 2 o 7 165g, SnCl 2 150g, BaCl 2 24g, ZnCl 2 6g, AlCl 3 4.5g, SrCl 2 3.5g, CaCl 2 9g.

[0025] b. Set the temperature of the water bath at 60°C, prepare a sodium pyrophosphate solution with a mass concentration of 20%, and heat it in the water bath;

[0026] c. Dissolve the above chloride with 180ml of HCl solution with a mass concentration of 15% and add 60ml of pure water to dilute it. When the temperature of the sodium pyrophosphate solution reaches 55°C, add the solution dropwise to the sodium pyrophosphate solution to react and keep stirring. Acceleration rate 15ml / min, stirring rate 100rad / s;

[0027] d. Continue stirring for 50 minutes after the dropwise addition, and heat preservation and aging for 60 minutes;

[0028] f. After aging, r...

Embodiment 2

[0034] A method for producing lead-free low-melting glass, comprising the following steps:

[0035] (1) Preparation of glass front matrix:

[0036] a. Measure raw materials according to the following quality:

[0037] Na 4 P 2 o 7 350g, SnCl 2 250g, BaCl 2 57g, ZnCl 2 13g, AlCl 3 7g, SrCl 2 8g, CuCl7.5g, CaCl 2 7g.

[0038] b. Set the temperature of the water bath at 70°C, prepare a sodium pyrophosphate solution with a mass concentration of 30% and heat it in the water bath;

[0039] c. Dissolve the above chlorides with 320ml of HCl solution with a mass concentration of 15% and dilute with 110ml of pure water. When the temperature of the sodium pyrophosphate solution reaches 55°C, add the solution dropwise to the sodium pyrophosphate solution to react and keep stirring. Acceleration rate 20ml / min, stirring rate 100rad / s;

[0040] d. Continue to stir for 50 minutes after the dropwise addition, and keep warm for 120 minutes;

[0041] f. After aging, rinse with pure ...

Embodiment 3

[0047] A method for producing lead-free low-melting glass, comprising the following steps:

[0048] (1) Preparation of glass front matrix:

[0049] a. Measure raw materials according to the following quality:

[0050] Na 4 P 2 o 7 325g, SnCl 2 250g, BaCl 2 40g, ZnCl 2 11g, AlCl 3 8g, SrCl 2 6.5g, CuCl5g, CaCl 2 6.5g.

[0051] b. Set the temperature of the water bath at 55°C, prepare a 30% sodium pyrophosphate solution and heat it in the water bath;

[0052] c. Dissolve the above chloride with 300ml of HCl solution with a mass concentration of 20% and dilute with 100ml of pure water. When the temperature of the sodium pyrophosphate solution reaches 55°C, add the solution dropwise to the sodium pyrophosphate solution to react and keep stirring. Dropping rate 20ml / min, stirring rate 150rad / s;

[0053] d. Continue to stir for 50 minutes after the dropwise addition, and heat preservation and aging for 140 minutes;

[0054] f. After aging, rinse with pure water for 3 to...

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Abstract

The invention discloses a lead-free low melting point glass and a method for producing the same. The melting temperature of the glass is between 400 and 680 DEG C and the thermal expansion coefficient thereof is between 75 and 130*10<-7> per degree centigrade. The method comprises the following steps: adopting a material with certain chemical activity to prepare a phosphate system powder material with a wide process range and strong adaptability; dissolving the phosphate system powder material in a hydrochloric acid environment so as to synthesize chloride containing Sn4P2O7, Ba<2+>, Al<3+>, Zn<2+>, Sr<2+>, Cu<+> and Ca<2+> so as to form a glass pre-matrix; and melting the glass pre-matrix and then compounding the glass pre-matrix with low expansion stuffing so as to generate a lead-free inorganic sealing material. The lead-free low melting point glass is suitable to adjust the thermal expansion coefficient and has lower softening temperature and good chemical stability.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a low-melting point glass, and also to a production method thereof. Background technique [0002] Low-melting point glass is mainly used for sealing and protection of electronic components and display devices, and can also be used for sealing with all other glass, ceramics, and metals that are consistent with the use temperature and expansion coefficient of this glass powder. And it is widely used in electronic slurry, special coating and other fields. Among the low-melting-point glasses, lead-containing low-melting-point glass has a series of characteristics such as large resistance, small dielectric loss, high refractive index and dispersion, absorption of high-energy radiation, low softening temperature, and good chemical stability. It has a wide range of electronic sealing. the use of. Pb0-SiO is often used in the preparation of lead-containing low-melting glass at home a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/24
Inventor 刘顺勇王天喜蒋飚
Owner 贵州威顿晶磷电子材料股份有限公司
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