Process temperature setting can reduce the harm of Pt

Temperature is decided by the amount of the PtO2 steam, but the glass fluid and ambient temperature difference △ T is the equation (1) real impetus, when △ T intensify violent reaction, whereas the reaction decreases; therefore possible reduced △ T, can also reduce condensation on the glass surface Pt.
We know that in the production of optical glass, clear part of the temperature and △ T max, which is the most intense reaction at this stage, and in this area due to the air bubbles, so the design of the crucible must be left at this stage the molten glass is relatively maximum free surface, thus causing another aspect, Pt crucible, there is a large portion is exposed to high temperature in the air, so most of the Pt is generated in this stage and in the glass melting or precipitation. Therefore, in the design of the clarification of the crucible were, be designed as a series of crucibles to reduce the size of the clear area(TFT Lcd Modules) can design a heating device in front, narrow the external atmosphere and the temperature difference between the molten glass, reducing the reaction driving force; also can be designed to clarify the drum-shaped parts, thus ensuring the residence time of glass to reduce as much as possible on the basis of Pt directly exposed to high-temperature air of the area, to further reduce the amount of reaction. To alleviate Pt "flash" is produced good.
Of course, in the production, the process should also be designed in accordance with the principles and methods to reduce the temperature of the refining zone to solve the "flash" is very effective. In addition, the production will encounter sometimes a "flashpoint" Reducing clarification zone temperature ineffective when, coming back to the previously mentioned "flash point" appears another key ---- Pt crystals dissolve and precipitation. Composition of the glass due to the different grades of different, there are differences in the solubility of Pt; and each of the different grades of the production process, will increase this difference. Therefore, this type of "flash" (COG LCD Display)may be created in the high temperature region that Pt component dissolved again precipitated at low temperatures.
The microstructure of this impurity exactly the same as the previous one, is often mistaken for the clarification zone generated, so take down the clarification zone temperature approach is not effective, and change the low temperature zone temperature gradient for solving this kind of form of "flash Point "is very effective. It is dissolved in the glass in the discharge tube Pt in the form of re-precipitation of crystals, the process is similar to the general glass crystallization. Low temperature crucible surface is not smooth crystallization of "nuclei", the appropriate temperature gradient and sufficient residence time for crystal growth to provide a suitable environment.