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Method for measuring silver content in silver slurry

A testing method and technology of silver paste, applied in the direction of weighing by removing a certain component, using material absorption and weighing, etc., can solve the problems of difficult sample preparation, impossibility of testing, complex components, etc.

Active Publication Date: 2014-04-30
CAIHONG GRP ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first X-fluorescence spectrometry test belongs to the scope of instrument analysis, mainly for inorganic powder or alloy solid seed method. Titration method is a traditional classic test method for high content silver, but the silver paste is different from the conventional inorganic silver salt, silver paste The main reason is that the composition is complex, it is a mixture of various organic substances and various inorganic substances, and the interference is too large, which makes accurate titration analysis impossible
The second kind of body sample detection requires the sample to be non-volatile and non-corrosive, and the silver prize material is a mixture of organic and inorganic substances, which is highly viscous and difficult to prepare sample cakes. It is mainly due to continuous volatilization of organic gases and corrosion of instruments, so it cannot carry out testing

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  • Method for measuring silver content in silver slurry
  • Method for measuring silver content in silver slurry
  • Method for measuring silver content in silver slurry

Examples

Experimental program
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Effect test

example 1

[0028] Step 1: Weigh 3.1904g of silver paste sample, put it in a porcelain crucible weighed at 550℃, and record the weight of the empty porcelain crucible in m 0 It is 24.4223g. Put the porcelain crucible in a high-temperature muffle furnace for burning treatment. The set temperature is 550°C (±10°C), and the burning time is 1 hour. Take it out with crucible pliers and put it in a silica gel desiccator. Cool to room temperature, weigh with an electronic balance with an accuracy of 0.0001g until constant weight, record the total mass m of the sample and the crucible after burning 1 Is 26.5773g, according to the following formula calculation silver paste sample burn rate w is 67.55%;

[0029] W = m 1 - m 0 m × 100 %

[0030] In the formula: m 0 --- is the mass of the empty ...

Embodiment 2

[0047] Step 1: Weigh 2.6167g of silver paste sample, put it in a porcelain crucible weighed at 550°C, and record the weight of the empty porcelain crucible in m 0 It is 22.9085g. Put the porcelain crucible in a high-temperature muffle furnace for burning treatment. The set temperature is 550°C (±10°C), and the burning time is 1 hour. Use crucible pliers to clamp it out and put it into a silica gel desiccator. Cool to room temperature, weigh with an electronic balance with an accuracy of 0.0001g until constant weight, record the total mass m of the sample and the crucible after burning 1 Is 24.6261g, according to the following formula calculation silver paste sample burn rate w is 65.64%;

[0048] W = m 1 - m 0 m × 100 %

[0049] In the formula: m 0 --- is the mass of the ...

Embodiment 3

[0066] Step 1: Weigh 3.1231g of silver paste sample, put it in a porcelain crucible weighed at 550℃, and record the weight of the empty porcelain crucible m 0 20.5086g, put the porcelain crucible in a high-temperature muffle furnace for burning treatment, set the temperature at 550°C (±10°C), set the burning time for 1 hour, clamp it out with crucible pliers, and put it into a silica gel desiccator Cool to room temperature, weigh with an electronic balance with an accuracy of 0.0001g until constant weight, record the total mass m of the sample and the crucible after burning 1 For 25.6854g, according to the following formula, the burn-out rate w of the silver paste sample is 65.82%;

[0067] W = m 1 - m 0 m × 100 %

[0068] In the formula: m 0 --- is the mass of the empty ...

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Abstract

A method for measuring silver content in a silver slurry comprises: burning a silver slurry sample in a muffle furnace with a temperature of 550 DEG C to remove organic matters, filtering for two times to remove other inorganic matters, so as to singly precipitating silver in a form of silver nitrate, utilizing excessive chloride ions and silver ions to fully generate silver chloride white precipitation, according to the mass conservation law, measuring the mass of generated silver chloride through a weight method, and calculating out the percentage of the silver content in the silver slurry, and performing a blank experiment on the filter paper, so as to guarantee the accuracy of the measurement. The method provided by the invention has the characteristics of being accurate in weighing and low in measuring cost.

Description

technical field [0001] The invention relates to a method for testing silver content, in particular to a method for testing silver content in silver paste. Background technique [0002] At present, silver paste is a new type of conductive material with complex components. There are few literatures on silver content testing methods. Generally, titration and X-fluorescence spectroscopy are the main methods for the detection of high silver content. [0003] There are great disadvantages in using the above two methods to test the high content of silver in the silver paste. The first X-fluorescence spectrometry test belongs to the scope of instrument analysis, mainly for inorganic powder or alloy solid seed method. Titration method is a traditional classic test method for high content silver, but the silver paste is different from the conventional inorganic silver salt, silver paste The main reason is that the composition is complex, it is a mixture of various organic substances ...

Claims

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Application Information

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IPC IPC(8): G01N5/02G01N5/04
Inventor 李宝军
Owner CAIHONG GRP ELECTRONICS CO LTD
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