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High-refractivity lanthanide optical glass NLaSF010 and method for manufacturing same

A technology of optical glass and high refractive index, which is applied in the field of high refractive index lanthanide optical glass NLaSF010 and its manufacturing, and can solve the problems of high production cost and high price

Inactive Publication Date: 2008-12-31
上海新沪玻璃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them Ta 2 o 5 and WO 3 Higher prices, resulting in higher production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 3

[0014] The manufacture technique of example 3, metering component by weight is SiO 2 10.71, B 2 o 3 8.76, La 2 o 3 29.7, Nb 2 o 5 6.09, ZrO 2 4.87,Y 2 o 3 0.97, WO 3 0.60, ZnO 0.15, BaO31.89, TiO 2 5.76, Gd 2 o 3 0.45, CaO 0.44, each component is evenly mixed and put into a 300CC platinum crucible, heated and smelted in a molybdenum wire rod electric furnace, the temperature is 1380°C and kept for 4-5 hours, then lowered to 1180°C, poured into a preheated iron mold , enter the annealing furnace heated by electric heating wire for annealing, keep warm at 660°C for 4 hours, cool down to 350°C at 10°C / H and turn off the power, take out the glass when it is close to room temperature, observe the quality of the glass, and then take samples to measure nd, nf-nc . At present, this brand can be put into a platinum crucible with a volume of 18 liters to 50 liters, melted in a molybdenum rod heating electric furnace, and put into mass production.

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PUM

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Abstract

The invention discloses a high-refractive index lanthanide optical glass NlaSF010, wherein, based on weight percentage, the glass comprises 5.0-12.0 percent of SiO2, 8.0-19.0 percent of B2O3, 23.0-31.0 percent of La2O3, 5.0-16.0 percent of Nb2O5, 2.0-6.5 percent of ZrO2, 0.5-2.5 percent of Y2O3, 0-4.0 percent of ZnO, 0-1.0 percent of CaO, 0.5-4.0 percent of WO3, 0-7.5 percent of Ta2O5, 18.0-33.0 percent of BaO, 0-5.5 percent of TiO2, and 0-1.0 percent of Gd2O3. The invention has no arsenic trioxide, lead dioxide and cadmium oxide, and is a green and environmental-friendly glass; the invention uses the low-price TiO2 to replace the vast majority of the high-price Ta2O5, and also uses the low-price Gd2O3 and BaO to replace the relatively high-price WO3, so as to reduce the raw material cost of the formula about 3-4 times, with no effect on glass quality and performance.

Description

technical field [0001] The present invention is a grade in the category of heavy lanthanum flint glass, which is used to manufacture high-refractive-index and high-dispersion lanthanum glass for advanced cameras and advanced precision instruments. Background technique [0002] At present, the composition of heavy lanthanum flint optical glass is: SiO 2 -B 2 o 3 -La 2 o 3 -Nb 2 o 5 -ZrO 2 -Y 2 o 3 -ZnO-Ta 2 o 5 -BaO-CaO-WO 3 . Among them Ta 2 o 5 and WO 3 Higher prices lead to higher production costs. Contents of the invention [0003] The purpose of the present invention is to provide low cost, crystallization performance, good formability, optical constants (nd, vd), bubbles, stripes meet the standard requirements of high refractive index lanthanide optical glass. [0004] The present invention is based on SiO 2 , B 2 o 3 , La 2 o 3 , BaO, Nb 2 o 5 , ZrO 2 , Y 2 o 3 、 Ta 2 o 5 , ZnO, WO 3 , CaO system based on TiO 2 Replace Ta 2 o 5 , Adju...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
Inventor 王佩珍翁泽安
Owner 上海新沪玻璃有限公司
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