Method for measuring chemical stability of glass based on glass column
A chemical stability, glass column technology, applied in the direction of measuring devices, scientific instruments, instruments, etc., can solve the problems of cumbersome operation, low surface quality, poor measurement accuracy, etc., achieve accurate measurement results, high surface quality, and solve the problem of testing long time effect
Active Publication Date: 2015-01-14
北京远大信达科技有限公司
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a method for measuring the chemical stability of glass based on a glass column. The method draws a glass sample into a glass column, and measures the quality difference before and after corrosion of the glass sample, as well as the initial density and the drawn strength. The chemical stability of the glass sample can be compared with the length of the glass column. This method overcomes the problems of cumbersome operation and poor measurement accuracy of the powder method, and the technical problem of the surface method being limited to glasses with irregular shapes or low surface quality. A universal method, and the experimental process is less affected by external factors, and the test is accurate
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] A method for determining the chemical stability of glass based on glass columns, comprising the steps of:
[0016] Step A. Melt the glass sample and draw it into a glass column with a uniform thickness and a diameter of 1.5-6.5mm. Cut off 30-50mm, and accurately measure its length, mass and density, which are recorded as , unit cm, , unit g, , unit g / cm 3 .
[0017] After the glass sample is melted, it is drawn into a glass column with a uniform thickness and a diameter of 1.5-4.0 mm by using a wire drawing machine or by hand, and the diameter range is preferably 2.5-6.0 mm. Drawing into a glass column is easy to implement in this field, which provides convenience for experiments, and the most special advantage of the drawn glass column is that the surface of the glass column only contacts air during the forming process, and does not contact any other medium. Under the action of tension, it becomes a smooth glass column with extremely small roughness, so the surf...
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Abstract
The invention discloses a method for measuring chemical stability of glass based on a glass column. The method comprises the following steps: step A, melting a glass sample, drawing the melted glass sample to form a glass column which is uniform in thickness and has the diameter of 1.5-6.5mm, cutting a part with length of 30-50mm, accurately measuring the length, mass and density of the cut glass column, and respectively recording the length as h in the unit of cm, the mass as m0 in the unit of gram and the density as rho in the unit of g / cm<3>; step B, performing a corrosion resistance test on the glass column cut in the step A in corrosive liquid, taking out, washing and drying the glass column, and accurately weighing to obtain m1 in the unit of gram; and step C, calculating the corrosion volume of the glass sample in unit area according to the formula shown in the specification, wherein Delta n refers to the corrosion volume of the glass sample in unit area, and the unit of the Delta n is mg / cm<2>. According to the method, the problems that the glass has a special shape, the surface quality of the glass is low and the chemical stability of the glass cannot be accurately compared are solved, the influence of external factors to the experimental process is small, and the test is accurate.
Description
technical field [0001] The invention relates to the field of physical and chemical performance testing, in particular to a method for measuring the chemical stability of glass based on a glass column, and is particularly suitable for the fields of flat glass such as TFT and PDP. Background technique [0002] Glass products are corroded by water, acid, alkali, salt, gas and various chemical reagents and liquid medicines during use. The resistance of glass to these erosions is called the chemical stability of glass. In the glass industry, the methods for testing the chemical stability of glass mainly include the surface method (also known as the bulk sample method) and the powder method. [0003] The essence of the powder method is to keep a sample with a certain particle size at a certain temperature for a certain period of time under the action of a certain corrosive agent, and then measure the weight of the powder loss, or use a certain analytical method to measure the loss...
Claims
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IPC IPC(8): G01N17/00
Inventor 张言帅王俊峰张广涛李俊锋闫冬成王丽红侯建伟
Owner 北京远大信达科技有限公司