Low-temperature lead-free glass powder for silver paste of front windshield of passenger car and preparation method of glass powder

A technology of lead-free glass powder and front glass, applied in the field of glass powder, which can solve the problems of under-burning, affecting product quality, and wide sintering window of conductive silver paste, and achieves the effects of environmental friendliness, low softening temperature and good matching

Inactive Publication Date: 2019-08-02
SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the silver pastes used in domestic passenger car glass factories are domestic silver pastes, and a small part of them are foreign products such as DuPont, Flow and Johnson Matthey. The main problems are as follows: the sintering window of conductive silver paste is relatively wide (600-750 ℃), some passenger car front windshield products show an underburned state, which leads to poor adhesion of the product and affects the quality of the product

Method used

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  • Low-temperature lead-free glass powder for silver paste of front windshield of passenger car and preparation method of glass powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0022] The raw material formula that the embodiment of the present invention 1-4 adopts is as shown in table 1 below:

[0023] Table 1

[0024]

[0025] The preparation process used in Examples 1, 2, 3 and 4 of the present invention is as follows: Accurately weigh various raw materials according to the weight percentages designed in Table 1, use a mixer to mix them, and then heat them at 1200°C for 50 Minutes, after the mixture is completely melted, water quenching to obtain glass slag. The glass slag is vibrated and ball milled in a ball mill jar for 8 hours, the particle size is detected, and then dried, and finally dispersed to obtain the low-temperature lead-free glass powder for the silver paste of the front windshield of the passenger car.

Embodiment 5

[0027] The low-temperature lead-free glass powder used for the silver paste of the front windshield of passenger cars is prepared by using the following raw materials with the following components and weight percentages: Bi 2 o 3 55%, B 2 o 3 12%, ZnO 15%, SiO 2 10%, Al 2 o 3 3%, Na 2 O 3%, Fe 2 o 3 1%, ZrO 2 1%.

[0028] The preparation method of the low-temperature lead-free glass powder for the silver paste of the front windshield of a passenger car adopts the following steps:

[0029] (1) Accurately weigh the raw materials according to the formula, then mix them uniformly to obtain the mixture;

[0030] (2) heat the mixture at a high temperature of 1050° C. for 60 minutes, and after the mixture is completely melted, water quench to obtain glass slag;

[0031] (3) glass slag was vibrated and ball milled in a ball mill jar for 5 hours, and particle size detection was carried out;

[0032] (4) Ball milling, sieving, drying, and finally dispersion to obtain lo...

Embodiment 6

[0034] The low-temperature lead-free glass powder used for the silver paste of the front windshield of passenger cars is prepared by using the following raw materials with the following components and weight percentages: Bi 2 o 3 75%, B 2 o 3 10%, ZnO 10%, SiO 2 3%, Al 2 o 3 0.5%, Na 2 O 0.5%, Fe 2 o 3 0.5%, ZrO 2 0.5%.

[0035] The preparation method of the low-temperature lead-free glass powder for the silver paste of the front windshield of a passenger car adopts the following steps:

[0036] (1) Accurately weigh the raw materials according to the formula, then mix them uniformly to obtain the mixture;

[0037] (2) heat the mixture at a high temperature of 1150° C. for 40 minutes, and water quench to obtain glass slag after the mixture is completely melted;

[0038] (3) The glass slag was vibrated and ball milled in a ball mill jar for 6 hours, and particle size detection was carried out;

[0039] (4) After ball milling, sieve, then dry, and finally dispers...

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Abstract

The invention relates to low-temperature lead-free glass powder for silver paste of a front windshield of a passenger car and a preparation method of the glass powder. The glass powder is prepared from components of raw materials in percentage by weight as follows: 55%-75% of Bi2O3, 10%-30% of B2O3, 5%-15% of ZnO, 3%-10% of SiO2, 0-3% of Al2O3, 0-3% of Na2O, 0-1% of Fe2O3 and 0-1% of ZrO2, and thecontent of the component is larger than 0. Compared with the prior art, the low-temperature lead-free glass powder has the characteristics of a lower softening temperature, good adhesion force, environmental protection and the like, and the thermal expansion coefficient of the glass powder is matched with that of black glaze.

Description

technical field [0001] The invention relates to a glass powder, in particular to a low-temperature lead-free glass powder for passenger car front windshield silver paste and a preparation method thereof. Background technique [0002] With the continuous development of my country's economy, the automobile industry has also developed rapidly and vigorously, and the output of passenger cars has also increased year by year. At the same time, the demand for silver paste and black glaze for the front windshield of passenger cars is also increasing, and the quality requirements are also getting higher and higher. [0003] In order to quickly eliminate fog and frost, the side of the front windshield of a passenger car is generally equipped with defogging and frost heating wires. The heating wire generally prints the silver paste on the surface of the bus glass and black glaze by screen printing technology, and heats it in a bending furnace at a high temperature of 600°C for 30-45mi...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C03C12/00
CPCC03C12/00
Inventor朱庆明江海涵何利娜王德龙
OwnerSHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD