Test method for chemical stability for water resistance of electronic glass

SJ/T 11035-1996 Test method for chemical stability of electronic glass against water SJ/T11035-1996 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Test method for chemical stability to resist water of electronic glass
Test method for chemical stability to resist water of electronic glass This standard applies to the test of chemical stability to resist water of electronic glass. 1 Method SummarywwW.bzxz.Net
GB9622.11-88
Reduced to SJ/T11035-96
Heat the particle sample with certain specification requirements in distilled water at 98℃ for a certain time, and then titrate the alkali precipitated after glass hydrolysis with hydrochloric acid standard solution on the upper water. Determine the hydrolysis level of the chemical stability to resist water of the glass according to the volume of hydrochloric acid used or the amount of sodium oxide precipitated.
2 Test Instruments
2.1 Analytical balance, sensitivity 0.0002g.
2.2 Microburette, 5ml, graduation value 0.02ml, 2ml, graduation value 0.01ml. 2.3 Volumetric flask, 50ml. If it is a new volumetric flask, fill it to the mark with water before use and heat it in a boiling water bath for 60min. Repeat the process 3 times.
Erlenmeyer flask, 100ml.
2.5 Pipette, 25ml.
2.6 Water bath.
2.7 Carbide mortar.
2.8 Metal wire sieve, pore size 0.5mm and 0.3mm. 2.9 Thermometer, 0~100℃.
2.10 Weighing bottle.
2.11 Measuring cup, 50ml.
3 Reagents
3.1 Steamed filling water, double distilled water or deionized water, boil for 15min before use to remove carbon dioxide. After adding 2 drops of methyl red indicator to 25ml water, it should appear orange-red.
3.2 Hydrochloric acid standard solution, 0.01 mol/L, prepared in accordance with GB601 "Standard Solution Preparation Method". 3.3 Methyl red indicator, 0.1%, prepared in accordance with GB603 "Preparation Method for Preparation and Product". 4 Preparation of Samples
4.1 Select glass without defects such as stones, bubbles and streaks, anneal to eliminate stress, and wipe it clean with anhydrous ethanol. 4.2 Larger glass can be wrapped with clean paper, broken in advance by hand hammer, and then crushed in a mortar, sieve out about 10g of particle sample between 0.5~0.3mm, and put it into a weighing bottle after magnetic separation. The sample should not be placed for more than 24h. Approved by the Ministry of Electronics Industry of the People's Republic of China on March 21, 1988 TTTKKAca
Implementation on February 1, 1989
5 Test steps
GB9622.11-88
5.1 Weigh 2.000g of sample and put it into a 50ml volumetric flask, add 30ml of distilled water, shake vigorously, and then slowly pour out the water. Wash it six times in total to remove the adhering glass powder.
5.2 Add water to the scale, shake the volumetric flask gently, so that the glass sample is evenly distributed on the bottom of the bottle, without adding a bottle stopper, put the volumetric flask into a boiling water bath to half the height of the bottleneck, and cover the bottle stopper after 5 minutes. 5.3 Keep the volumetric flask in the boiling water bath for 60 minutes. The temperature in the bottle should be 98±0.5℃. 5.4 Take out the volumetric flask and quickly cool it to room temperature. 5.5 Dilute with water to the mark and shake well. Take 25 ml of the test solution in a conical flask, add 2 drops of methyl red indicator, and titrate with 0.01 mol/L hydrochloric acid standard solution until the test solution changes from yellow to orange-red. Record the volume of hydrochloric acid standard solution consumed in the titration. 5.6 While measuring the sample, a blank test should be performed with distilled water. 6 Calculation
When expressed as the volume V (m1) of 0.01 mol/L hydrochloric acid standard solution consumed by 1 g of sample: V-Vi-Vo
Where: V1g is the volume of hydrochloric acid standard solution consumed by the glass sample, ml, V.——The actual volume of hydrochloric acid standard solution consumed, ml, Vo is the volume of hydrochloric acid standard solution consumed in the blank test, ml. When expressed as the mass W (ug) of sodium oxide precipitated from 1g of sample, the conversion relationship between hydrochloric acid standard solution and sodium oxide is: 1ml0.01mol/L(HC1)=310μg(Na20)7Test results
According to the calculation results, the hydrolysis level of the sample's anti-aqueous chemical stability is determined according to the table. Table Determination of the hydrolysis level of anti-aqueous chemical stability Level
The volume of 0.01mol/LHCI consumed per gram of glass Vml/g
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