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Low-temperature acid-resistant sintered glass powder

A sintered glass, low temperature technology, applied in the chemical industry, can solve the problems of low cost, inability to adapt to lead-free, large thermal expansion coefficient, etc., and achieve excellent chemical stability, wide performance adjustment range, and high cost performance.

Inactive Publication Date: 2011-09-21
李胜春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The softening temperature of the glass is 400-430°C, and the coefficient of thermal expansion is 145-170×10 -7 / °C, although the softening temperature of this glass is suitable for low-melt sealing, but the thermal expansion coefficient of this glass is relatively large, it cannot be used for medium and low expansion coefficient sealing, and it contains a small amount of lead, which cannot meet the requirements of lead-free. Due to the noble metal ZrO 2 The content is relatively high, so there is also no advantage in terms of cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. The raw material composition is by weight percentage:

[0049] SiO 2 50%, B 2 o 3 10%, Al 2 o 3 3%, BaO 10%, ZnO 7%, TiO 2 2%, Na 2 O is 8%, K 2 O is 4%, CuO is 1%, MnO 2 1%, P 2 o 5 4%.

[0050] 2. Preparation method:

[0051] (1) take each raw material according to the weight percentage of each component;

[0052] (2) Fully mix the raw materials taken;

[0053] (3) Put the mixed mixture into a crucible, then put it into an electric furnace with a furnace temperature of 1380 ° C, keep it warm for 6 hours, stir once every 1 hour during the heat preservation stage, and stir for 3 minutes each time;

[0054] (4) Pour the melted glass liquid into a tablet press and press into thin slices or pour into cold water to quench;

[0055] (5) Put flake or granular glass into a ball mill for ball milling;

[0056] (6) Sieve, test and pack the ball-milled glass powder.

[0057] 3. Test results:

[0058] BaO / ZnO: 1.43

[0059] Expansion coefficient: 85×10 -7 / °C...

Embodiment 2

[0064] 1. The raw material composition is by weight percentage:

[0065] SiO 2 34%, B 2 o 3 11%, Al 2 o 3 4%, BaO 15%, ZnO 10%, TiO 2 5%, Na 2 O is 10%, K 2 O is 3%, CuO is 3%, MnO 2 3%, P 2 o 5 2%.

[0066] 2. Preparation method:

[0067] (1) take each raw material according to the weight percentage of each component;

[0068] (2) Fully mix the raw materials taken;

[0069] (3) Put the mixed mixture into a crucible, then put it into an electric furnace with a furnace temperature of 1350° C., keep it warm for 4 hours, stir once every 1 hour during the heat preservation stage, and stir for 3 minutes each time;

[0070] (4) Pour the melted glass liquid into a tablet press and press into thin slices or pour into cold water to quench;

[0071] (5) Put flake or granular glass into a ball mill for ball milling;

[0072] (6) Sieve, test and pack the ball-milled glass powder.

[0073] 3. Test results:

[0074] BaO / ZnO: 1.5

[0075] Expansion coefficient: 94×10 -7 / °...

Embodiment 3

[0080] 1. The raw material composition is by weight percentage:

[0081] SiO 2 66%, B 2 o 3 5%, Al 2 o 3 1%, BaO 6%, ZnO 4%, TiO 2 2%, Na 2 O is 8%, K 2 O is 4%, CuO is 1%, MnO 2 1%, P 2 o 5 2%.

[0082] 2. Preparation method:

[0083] (1) take each raw material according to the weight percentage of each component;

[0084] (2) Fully mix the raw materials taken;

[0085] (3) Put the mixed mixture into a crucible, then put it into an electric furnace with a furnace temperature of 1450° C., keep it warm for 8 hours, stir once every 1 hour during the heat preservation stage, and stir for 3 minutes each time;

[0086] (4) Pour the melted glass liquid into a tablet press and press into thin slices or pour into cold water to quench;

[0087] (5) Put flake or granular glass into a ball mill for ball milling;

[0088] (6) Sieve, test and pack the ball-milled glass powder.

[0089] 3. Test results:

[0090] BaO / ZnO: 1.5

[0091] Expansion coefficient: 71×10 -7 / °C(30...

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Abstract

The invention relates to a low-temperature acid-resistant sintered glass powder, which comprises the following raw materials in percentage by weight: 30-70% of SiO2, 1-20% of B2O3, 1-10% of Al2O3, 1-20% of BaO, 1-20% of ZnO, 1-10% of TiO2, 1-20% of Na2O, 1-20% of K2O, 1-10% of CuO, 1-10% of MnO2 and 1-10% of P2O5, wherein the ratio of BaO to ZnO in percentage by weight is more than 1 and less than 2 and the total percentage by weight of Na2O and K2O is 6-25%. The preparation process of the sintered glass powder comprises the following steps: weighing, mixing materials, melting, tabletting, ball-milling and screening. The sintered glass powder has the advantages of low sintering temperature, high airtightness, high chemical durability and high acid resistance, and can be used for the inorganic adhesive phase of electroconductive electronic slurry, the glass paste used for a protective coating and etc.

Description

【Technical field】 [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a low-temperature acid-resistant sintered glass powder. 【Background technique】 [0002] The existing low-melting glass for electronic paste contains a large amount of heavy metal lead. Lead is one of the six metals used by humans at the earliest. It is harmful to human health and can accumulate in the body to cause lead poisoning. The role of lead poisoning Rather slow and stealthy, it is not easy to detect until the toxicity is manifested. Lead is a cumulative poison, which is easily absorbed by the gastrointestinal tract, part of which destroys the blood to decompose red blood cells, and part of it spreads to the organs and tissues of the whole body through the blood and enters the bones. However, lead compounds deposited in internal organs and bone marrow are excreted very slowly from the body, gradually forming chronic poisoning. [0003] In the past...

Claims

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Application Information

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IPC IPC(8): C03C12/00
Inventor 李胜春武荣丽刘立起
Owner 李胜春
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