High refractive index middle-expansion core material glass for middle-expansion optical fiber image inverter, and preparation method thereof
A high-refractive-index, core glass technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of the optical fiber imager not having the ability to transmit light, devitrification, and weak anti-devitrification ability, etc. Special production process requirements, good devitrification resistance and high glass transmittance
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[0029] Corresponding to the above formula system, a preparation method of high refractive index medium-expansion core glass used in medium-expansion optical fiber invertors includes the following steps:
[0030] 1) Put the raw materials into a platinum crucible at 1380-1420℃;
[0031] 2) After the feeding is completed, the temperature is raised to the clarification temperature of 1450±10℃ within 30-40 minutes, and the clarification time is 6-8 hours;
[0032] 3) After the clarification is finished, it takes 30-60 minutes to cool down to the pouring temperature of 1270-1290°C, and it is poured into a mold into a glass rod;
[0033] 4) The formed glass rod is annealed at 550-600°C after demolding. After holding for 2-2.5 hours, it is cut off and the temperature is reduced, and it can be taken out at room temperature.
Example Embodiment
[0035] Example 1:
[0036] A high-refractive-index medium-expansion core glass used in medium-expansion optical fiber imagers, which is composed of the following parts by mass of raw materials:
[0037] Table 1
[0038]
Example Embodiment
[0039] Example 2:
[0040] A high-refractive-index medium-expansion core glass used in medium-expansion optical fiber imagers, which is composed of the following parts by mass of raw materials:
[0041] Table 2
[0042]
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