HG/T 2735-1995 Test method for melt flow of glass enamel HG/T2735-1995 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2735—1995
Test Method for Melt Flow of Glass Glaze
(eqvISO4534-1980(E)）
Published on July 5, 1995
Ministry of Chemical Industry of the People's Republic of China
Implementation on the Standard Granting Network bono.cc on March 1, 1996
1. Domestic Introduction
4. Subject content and scope of application
6. Reference glass glaze
7. Preparation of test sample
8. Test method
9. Test results
Appendix A (suggestive appendix)
Selection of flow plate
Standard website mmcbzom.ccm Domestic Foreword
This standard adopts ISO4534-1980 (E) equivalently. The flowability of glass glaze, especially the flowability at the sintering temperature, is one of the important parameters to measure the process performance of glass glaze. It has a very important relationship with the product sintering temperature, sintering temperature range, sintering times, product yield rate, product quality, etc. Therefore, in order to determine the sintering temperature and sintering temperature range and ensure product quality, a certain method should be used to measure the flowability of glass glaze. Compared with the methods used by some domestic enterprises, this standard provides us with a more scientific and advanced measurement method.
Compared with ISO4534-1980(E), the major changes in this standard are the mold diagram in 2.6 and the requirements for mortar and rod materials in 2.2 and 2.3, and the description of the test principle in the original text has been deleted. Some of the test equipment and all the data used in this standard are referenced from: ISO4534~1980(E) Determination of flow properties of sugar glass glaze-melt flow test method. Through experimental verification, these experimental equipment and data are fully applicable to my country's pond glass glaze. The appendix of this standard is a prompt appendix.
This standard was proposed by China National Chemical Equipment Corporation and is under the jurisdiction of the National Pond Glass Equipment Standardization Technical Committee. This standard was drafted by the Chemical Machinery Research Institute of the Ministry of Chemical Industry. The main drafters of this standard: Sang Linchun, Liu Liangyue This standard was first issued in 1995 and implemented in 1996. Standard Jiehuo.mbrsosp:ccm Various standards industry materials free download Preface
The test method described in this international standard is a relative method. The test can be carried out with simple equipment and provide data on the melt flow of pond glass glaze. In this way, the fluidity of pond glass glaze can be calculated in a very simple way, which is more economical than the results usually measured by viscosity measuring instruments. Numerous test results show that there is a very clear relationship between the viscosity-temperature curve, so this test method can also be used as an absolute method. When using this method, the reference pond glass glaze should be similar to the pond glass glaze to be tested, because the flow properties of various types of pond glass glaze vary greatly with different components. Standard Lanji Network mm.bx Product mouth product o.con Various standards industry material application fee download People's Republic of China Chemical Industry Standard
Tang glass glaze melt flow test method
Topic content and scope of application
This standard specifies the melt flow test method of glass glaze. This standard is applicable to the determination of high temperature fluidity of sugar glass glaze. HG/T2735—1995
This standard is a relative method. The test results obtained according to this standard are comparable only when the same reference sample, melting temperature, holding time, flow time, and the particle size of the test sample and the reference sample are the same. 2 Definitions
2.1 Holding time: The time from the reference sample reaching the melting temperature to the time when the holding time forms a hemispherical shape is the holding time. 2.2 Flow time: The time from the reference sample or the test sample starting to flow on the flow plate inclined at 45 to the width of about 10mm from the edge of the flow plate is the flow time.
3 Equipment
3.1 Ball mill.
3.2 Grinding body, material: 65Mn. bzxz.net
3.3 Rod, material: 65Mn.
3.4 ​​Hot air oven.
balance, accuracy to 0.01g
press, at least 5MPa pressure is given when preparing samples, and it is equipped with a mold with an inner diameter of ·8mm (Figure 1) 3. 8
Figure 1 Mold
Approved by the Ministry of Chemical Industry of the People's Republic of China on July 5, 1995 40
18+4022
08-ams
Implementation on March 1, 1996
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3.7 Flow plate (Figure 2), a smooth unglazed porcelain plate, 5-6mm thick, must be pre-fired at a temperature not lower than 1100℃, its water absorption rate at atmospheric pressure is not more than 25%, and it is a uniform fine porcelain piece. 75
Figure 2 Flow plate
3.8 Tiltable rack (schematic diagram of the tiltable rack is shown in Figure 3), made of heat-resistant alloy steel, which allows the flow plate to be placed horizontally in the electric heating furnace and can tilt the plate 45°
Figure 3 Tiltable rack
Tiltable rack with flow plate and 4 specimens tilted at 45°
3.9 Electric heating furnace, furnace belly size 250mm×150mm×100mm, maximum temperature 960±10c. 3.10 Stopwatch
3.11 Caliper: (0~150mm)±0.1mm Reference Glass Shaft
Reference Glass glaze is a kind of stable performance glass glaze verified by many experiments. It is determined by the tester according to the purpose of the test. 5 Preparation of test sample
5.1 Sampling and processing of glass glaze
Test glass can be taken from ground porcelain powder or ground separately in a ball mill. Wet glass glaze should be heated in a hot plate. 2.
Standard Exchange Network 6 oBo.eom Various standard industry information free download Dry, cool, and grind with a rod and mortar. 5.2 Preparation of samples
HG/T2735—1995
Drop a drop of water into an empty mold, add 1.00±0.01g of glass glaze prepared according to the method described in 5.1, and then drop another drop of water, and immediately press the sample with a pressure of ≥5MPa. Prepare the reference glass glaze sample in the same way. s.3 Number of samples
The number of test samples and reference samples required for each test shall not be less than 6, so as to ensure that there are more than 2 spare samples. 6 Test method:
At least 30 minutes after the sample is prepared, place a test sample and a reference sample horizontally on the flow plate of the tiltable rack, heat it to the melting temperature of the reference glass glaze and keep it warm. After the insulation is over, tilt the tiltable rack 45° and start timing until the flow time is over, and take out the flow plate from the furnace.
Measure the flow length and maximum flow width of each sample on the test plate. In each measurement, each group of samples shall be tested at least twice, and the positions of the test samples and reference samples shall be interchanged in different tests.
7 Test results
The length flow coefficient FL and the maximum width flow coefficient FP are calculated according to the following formula
Where: L, - test sample flow length
L, - reference sample flow length
Where: b.- maximum flow length of test sample Unit: mm
Unit: mm
Unit: mm
b.- maximum flow length of reference sample
8 Test report
The test report includes the following contents:
Unit: mm
, design of test glass glaze and reference glass glaze; b. Maximum test temperature;
c. Heating and holding time;
d. Molten glaze flow time:
e. Number of samples used in the test:
Quantity. Number of tests:
g. Length flow coefficient F, and maximum width flow coefficient F. , give the individual values ​​and their arithmetic mean h. test date.
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Appendix A (suggestive appendix)
Selection of flow plate
After many tests, it has been confirmed that it is valuable to use unglazed porcelain as flow plate, which can meet the needs of powdered glass glaze (dry sugar porcelain), wet cast iron glass glaze and steel plate glass glaze. Compared with steel plate or cast iron plate, the cost of unglazed porcelain plate is low.The cast iron plate or steel plate should first be covered with a base glaze that matches the glass glaze to be tested. The base glaze on the steel plate and cast iron will melt again during the melt flow test, thus affecting the flow of the sample. In addition, the base glaze on the steel plate and cast iron may react with the sample when heated. Since each test is relative, the glass glaze may sometimes soften during the melt flow test, but it will automatically compensate and no error will be generated.
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Chemical industry standards
Glass shaft melt flow test method
(eqvISO4534-1980(E)
HG/T2735-1995
Editor China Chemical Equipment Corporation
Postal code 100011
Print Beijing University of Chemical Technology
Copyright
No reproduction
880×1230
First edition in March 1996
Printing sheet 0.75
15 Handwriting
First printing in March 1996
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