This standard is applicable to the measurement of the volume density P of piezoelectric ceramic materials. GB 2413-1981 Measurement method of volume density of piezoelectric ceramic materials GB2413-1981 Standard download decompression password: www.bzxz.net

The National Standard of the People's Republic of China
Method for measuring the bulk density of piezoelectric ceramic materials This standard is applicable to the measurement of the bulk density P of piezoelectric ceramic materials. 1 Sample
GB 2413--- 81
A sample of any size and shape with a mass of no more than 2 grams, with a flat surface, no electrodes, and kept clean. 2 Principle of measurement
Bullet density refers to the mass of a substance per unit volume, which is generally determined by measuring the mass and volume of the sample. According to the Archimedean principle, the volume is determined by the displacement method, and a precision balance is used for weighing. The calculation formula for the bulk density of the sample is: 0
Where: p—-bulk density of the sample, kg/m*; mo
The mass of the sample after drying, kg,
The mass of the sample in air after water saturation, kgm2
The density of water, the density of water corresponding to the water temperature at the time of measurement, k/m2. Pk
3 Measurement method
3.1 Measurement equipment and requirements
Oven, 1/10,000 analysis flat plate, beaker: bracket; tweezers, use metal wire or hair with a diameter of less than 0.15mm as the wire for the mesh basket, sparse mesh blue. www.bzxz.net
3.2 Measurement steps
3.2.1 The sample is dried at about 110°C (about 4 hours), kept dry and cooled to room temperature, and weighed mo. 3.2.2 Immerse the sample in water for 3 to 4 hours. 3.2.3 After putting the soaked sample into the mesh basket, immerse the mesh basket and the sample in water, weigh the mass mtotal of the mesh basket, then take out the sample, do not change the height of the mesh basket, weigh the mass mnet of the mesh basket, then m2=mtotal-mliang. The schematic diagram of weighing m2 is as follows: National Standards Administration issued by the Fourth Ministry of Machinery Industry of the People's Republic of China and implemented on October 1, 1981. Shanghai University of Science and Technology, 721 Guangdong. GB 2413-81. Weighing m2. 1-Yao Shu's mesh chain 2-Half cut burning heart; 3-test, 4-stand 3.2.4 Wipe the moisture on the surface of the sample with a damp cloth, and try to avoid absorbing moisture in the pores when wiping, and then weigh ml. 3.2.5 Steps 3.2.3 and 3.2.4 are repeated 5 times respectively, and the half average of the 5 times is taken. 4 Calculation. Calculate the volume density of the sample according to the volume density. The density of water at 0-100℃ is shown in the appendix.
5 Test error
The relative test error of volume density p is ±0.5%. Temperature requirement
Measurement interval
995.672995.520
98800
994,65h
GB 241381
0～100℃Density of water (dry g/m3)1.5
991,B85
87-615
98,28
999-968
998800
999-356
986,921
993,175
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973-068
1900-990999.998
994-397
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