Salt bath composition for strengthening glass article, method for strengthening glass article using said salt bath composition, and glass article strengthened thereby
A technology for glass products and salt baths, which is applied to the salt bath composition for strengthening glass products, and can solve the problems of reducing the chemical durability of glass
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Embodiment 1
[0082]In order to observe the ability of metal oxide nanoparticles to neutralize potassium hydroxide, 0.06 g of SiO with an average particle size of about 7 nm 2 Nanoparticles were dissolved in 1 L of 0.001 M KOH solution. The solution was then heated to about 22°C and stirred at 400 rpm while monitoring and recording the conductivity and pH of the solution every 5 minutes. figure 2 The results are shown graphically.
[0083] Such as figure 2 The results shown show that the inclusion of silica nanoparticles in the potassium hydroxide solution resulted in a smooth decrease in both the conductivity and pH of the solution. As shown, the drop in pH is directly related to the drop in conductivity. Without being bound by any particular theory, it is believed that both the conductivity and the pH of the solution drop may be due to the potassium (K + ) and hydroxide (OH - ) caused by the reduction or elimination of ions. Within 1 hour, the conductivity of the solution dropped ...
Embodiment 2
[0085] The procedure as described in Example 1 was carried out again at a temperature of about 50°C. The conductivity and pH of the solution were monitored and recorded every 5 minutes. image 3 The results are shown graphically.
[0086] Such as image 3 The results shown show that the inclusion of silica nanoparticles in the potassium hydroxide solution resulted in a smooth decrease in both the conductivity and pH of the solution. The conductivity of the solution dropped from about 250 μS / cm to about 175 μS / cm over the course of 30 minutes. Similarly, the pH of the solution dropped from about 10.50 to about 9.95. This decrease in conductivity indicates that the nanoparticles are able to reduce the concentration of free ions in solution. That is, the nanoparticles are capable of reacting or binding with ions present in the molten salt bath. Similarly, this pH decrease indicates that the nanoparticles can effectively neutralize potassium hydroxide in the molten salt bath,...
Embodiment 3
[0088] The procedure as described in Example 1 was carried out again at a temperature of about 80°C. The conductivity and pH of the solution were monitored and recorded every 60 seconds. Figure 4 The results are shown graphically.
[0089] Such as Figure 4 The results shown show that the inclusion of silica nanoparticles in the potassium hydroxide solution resulted in a smooth decrease in both the conductivity and pH of the solution. The conductivity of the solution dropped from about 300 μS / cm to about 250 μS / cm over the course of 5 minutes. Similarly, the pH of the solution dropped from about 10.49 to about 10.37. This decrease in conductivity indicates that the nanoparticles are able to reduce the concentration of free ions in solution. That is, the nanoparticles are capable of reacting or binding with ions present in the molten salt bath. Similarly, this pH decrease indicates that the nanoparticles can effectively neutralize potassium hydroxide in the molten salt ba...
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