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Method for chemically analyzing content of boron nitride in nickel-based powder material

A technology of nickel-based powder and boron nitride, applied in the direction of material excitation analysis, etc., can solve the problems of particle size, uneven composition, difficulty in boron nitride content, etc., and achieve the effect of high accuracy and small external influence factors

Inactive Publication Date: 2014-11-19
PLA NO 5719 FACTORY
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Problems solved by technology

Since the nickel-based spraying material is a composite powder with uneven particle size and composition, it is impossible for X-rays to irradiate the sample surface uniformly, and there is no complete set of standard substances close to the sample to establish a standard curve, so XRF must be used to accurately analyze nickel The content of boron nitride in matrix composites is more difficult

Method used

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  • Method for chemically analyzing content of boron nitride in nickel-based powder material
  • Method for chemically analyzing content of boron nitride in nickel-based powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one : Determination of boron nitride content in Y boron C-2 composite rod

[0023] 1. Instruments and equipment used in the experiment

[0024] Inductively coupled plasma atomic emission spectrometer: German SPECTRO ARCOS

[0025] Ultrapure water machine: Shanghai Youpu UPR-I-10T+UPT-II-10T combined type

[0026] Electronic balance: Sartorius CP124S (weighing range 0.1mg ~ 220g).

[0027] 2. Reagents used in the experiment

[0028] Ultrapure water (homemade)

[0029] Concentrated nitric acid ρ1.42g / mL, analytically pure

[0030] Hydrochloric acid ρ1.19 g / mL analytically pure

[0031] Mixed acid: hydrochloric acid + nitric acid + water = 2+1+2

[0032] Mixed acid: hydrochloric acid + nitric acid = 2 + 1

[0033] Anhydrous Sodium Carbonate Analytical Pure

[0034] Boron standard solution 1000 μg / mL.

[0035] 3. Test procedure

[0036] 3.1 Sample processing

[0037] The sample was hammered into a fine powder with a hammer, and the fine powder was pa...

Embodiment 2

[0075] Embodiment two , Comparison of various methods for the determination of boron nitride content in the same batch of nickel-based composite spraying materials

[0076] The boron content in the same batch of nickel-based composite spraying materials was measured by plasma atomic emission spectrometry (ICP-AES), X-ray fluorescence spectrometry (XRF), gravimetric method, and volumetric method, and converted into boron nitride content. The results are shown in Table 7.

[0077] Table 7 Experimental data of boron nitride content determined by different methods

[0078] experiment method J-YT01-13032001 J-YT01-12120401 ICP-AES 12.21、12.25 11.54、11.66 XRF 12.15、12.28 11.79、11.62 gravimetric method 12.38、12.22 11.56、11.73 Kjeldahl method 12.19、12.28 11.55、11.62

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Abstract

The invention relates to a method for chemically analyzing the content of boron nitride in a nickel-based powder material. The method comprises the steps: separating boron nitride, which is insoluble in acid, in a nickel-based composite spraying material by adopting mixed acid, fusing a boron nitride precipitate by adopting anhydrous sodium carbonate to obtain water-soluble sodium borate, determining emission strength of boron under the working condition of an inductively coupled plasma (ICP) emission spectrometer, and converting the emission strength into the content of boron nitride in a sample. According to the method for chemically analyzing the content of boron nitride in the nickel-based powder material, boron nitride is converted into water-soluble sodium borate by adopting anhydrous sodium carbonate through fusion, the content of boron nitride in the nickel-based composite spraying material is determined by virtue of the plasma atomic emission spectrometer, insoluble boron nitride is converted into soluble borate, and thus the defects of complexity in operation and long consumed time when boron nitride is determined by adopting a volumetric method are prevented; and the method has the advantages of being accurate to analyze and simple and convenient to operate.

Description

technical field [0001] The invention relates to a chemical analysis method for boron nitride content in nickel-based powder materials. Background technique [0002] A nickel-based powder material is made by mixing boron nitride, silicon dioxide, copper oxide and cadmium oxide powder. At present, the commonly used test method for boron nitride is to measure the nitrogen content in boron nitride, and then convert it into boron nitride The percentage content, Kjeldahl method and Dumas method are generally considered to be classic nitrogen determination methods. The Dumas method is to mix the boron nitride sample with the oxidant (such as lead oxide and lead chromate) in equal amounts, decompose to produce nitrogen, use carbon dioxide as the carrier gas, and collect the nitrogen gas to measure the volume after the exhaust gas absorbs carbon dioxide through the potassium hydroxide solution. , to determine the nitrogen content by volume. The Kjeldahl method is to heat and decomp...

Claims

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Application Information

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IPC IPC(8): G01N21/62
Inventor 向巧胡桂英张桂李咏刘芸杉
Owner PLA NO 5719 FACTORY
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