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Method for measuring content of silver in silver slurry

A measurement method and technology of silver content, which is applied in the field of chemical analysis, can solve the problems of large error in test results, troublesome pre-processing, and difficulty in mastering, etc., and achieve the effect of accurate and objective end point, reduced reagent volume, and small relative error

Inactive Publication Date: 2015-06-24
NINGBO GUANGBO NEW NANOMATERIALS STOCK
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  • Description
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Problems solved by technology

This method is cumbersome to operate, difficult to master, and requires the use of inductively coupled plasma emission spectrometer (ICP), X-ray fluorescence spectrometer, etc. for testing
Among them, the inductively coupled plasma emission spectrometer test needs to dissolve and dilute the sample. For 55-70% silver, the test result has a large error; at the same time, the pre-treatment is also more troublesome.
However, X-ray fluorescence spectrometry requires standard samples to test, and needs to correct the influence of solvent in the silver paste, which is costly

Method used

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

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Embodiment Construction

[0033] Burn the working standard reagent sodium chloride in a high-temperature furnace at 550°C for 0.5h to the constant weight of sodium chloride, accurately weigh 5.8442g, dissolve it in deionized water, transfer it into a 1000mL volumetric flask, and set the volume to the mark. This solution is the sodium chloride standard titration solution of 0.1mol / L, and it is reserved for future use. Take the silver paste in the ceramic crucible, weigh the total mass of the crucible and the silver paste to be 42.6829g, and the mass of the crucible is 32.6801g. , cooled to room temperature, weighing the total mass of the crucible and solid particles is 38.7056g, then the solid content of silver in this silver paste is A=(38.7056-32.6801) / (42.6829-32.6801)=60.24%. Grind the solid particles into powder with a mortar and set aside. Weigh an appropriate amount of the above-mentioned silver powder with a uniform mass of 0.4020 g, dissolve it in 5 mL of dilute nitric acid prepared with conce...

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Abstract

The invention discloses a method for measuring the content of silver in silver slurry. The method comprises the following steps of: taking the silver slurry, heating and drying into a solid, and grinding the solid into powder; adding hydrogen nitrate, heating at a low temperature to ensure that the powder is dissolved; and adding starch, and measuring the content of the silver by using a potentiometric titration method through adopting a sodium chloride solution. The method is capable of accurately measuring the content of the silver in the silver slurry, is convenient and rapid, is little in reagent consumption, is low in measurement cost, is increased in working efficiency and is wide in applicable range.

Description

technical field [0001] The invention relates to the field of chemical analysis, in particular to a method for measuring silver content in silver paste. Background technique [0002] Generally speaking, conductive silver paste is composed of three parts: metallic silver particles, glass powder and organic vehicle. Silver is used as the conductive phase, and glass is used as the binding phase. They are uniformly distributed in the organic vehicle to form a dispersion system with thixotropy and printing properties. [0003] Metallic silver particles are the main component of conductive silver paste, and the content in the paste is directly related to the conductivity. In a sense, high silver content is beneficial to improve its conductivity, but when its content exceeds the critical volume concentration, its conductivity cannot be improved. Generally, the silver content in the silver paste is between 55% and 70%. [0004] At present, there are three main methods for direct d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/42
Inventor 宋财根朱浩峰龚丹宇朱杰
Owner NINGBO GUANGBO NEW NANOMATERIALS STOCK
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