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Tantalum containing glasses and glass ceramics

A technology of glass and glass materials, applied in the direction of active dielectric materials, instruments, optical components, etc., can solve the problem of unable to display the gain curve, etc., and achieve the effect of excellent width and flatness characteristics and easy adjustment

Inactive Publication Date: 2001-08-15
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many oxide glasses cannot exhibit gain curves that are sufficiently flat (i.e., gain deviation less than 10%) over a broad amplifier band (i.e., width greater than 32nm)

Method used

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  • Tantalum containing glasses and glass ceramics
  • Tantalum containing glasses and glass ceramics
  • Tantalum containing glasses and glass ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1 -Preparation of KLT glass and glass ceramics

[0058] A variety of KLT glasses and glass-ceramics were prepared by first mixing the batches shown in Table 1 below.

[0059] 88BHH

[0060] 88BHH

[0061] After testing the KLT glass, the glass cake was placed in an electric heating furnace and heated at a temperature of about 650-775° C. for about 0.5-4 hours to ceramize the glass to cause nucleation. After the first soak period, the glass cake is heated at about 750-950°C for about 0.5-4 hours to cause crystal growth. Then, the resulting glass-ceramic was cooled. Table 3 below lists the specific ceramization process for each sample. As shown in Table 3, the appearance and crystalline phase of each glass-ceramic were examined. In addition, Table 3 also shows the dielectric constant, dielectric loss factor and DC resistivity (in terms of Log 10 expressed in ohms-centimeters). For glass ceramic 88BHH, measure the dielectric constant ...

Embodiment 4

[0074] Example 4 -Comparison of emission spectra of glass 88LNQ and glass ceramic 88LNQ

[0075] The common composition of 88LNQ glass and 88LNQ glass ceramics is shown in Table 7, and the emission peaks of their emission spectra are located at or near 1530nm (such as Figure 5 shown). In the band range from 1450nm to 1650nm, the emission spectrum of 88LNQ glass-ceramic is significantly narrower. This shows that Er 3+ The ions are selectively located in the pyrochlore crystalline phase rather than in the glassy phase. Without being bound by a particular theory, it is believed that KTaO 3 Er in the crystal structure 3+ site than Er in glass 3+ The sites are more confined and thus the emission spectrum is narrower.

Embodiment 5

[0076] Example 5 -Preparation of LTN glasses and glass ceramics

[0077] Various LTN glasses and glass-ceramics were prepared by first mixing the batches shown in Table 10 below.

[0078] 875VG

875WH

SiO 2

15.2

14.8

al 2 o 3

5.5

5.4

Ta 2 o 5

64.0

69.8

Nb 2 o 5

9.6

4.7

Li 2 o

5.4

5.3

[0079]Subsequently, the batch was ball milled and loaded into a covered platinum crucible. Put the crucible into an electric heating furnace maintained at about 1300-1650° C., and melt for about 2-16 hours. Next, the melt is poured onto a steel plate to form a cake-shaped melt. The melt was then cooled, and the glass was inspected. Glass 875VG is clear, amber and somewhat opalescent. The glass 875WH ​​is also transparent and has an amber tint.

[0080] After the detection of the LTN glass, the glass cake is placed in an electric heating furnace and heated at a temperat...

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Abstract

The present invention relates to a glass matrix which includes 4-70 wt.% SiO2, 0.5-20 wt.% Al2O3, 0-20 wt.% R2O, 0-30 wt.% R'O, 8-85 wt.% Ta2O5, 0-40 wt.% Nb2O5, and 0.01-1.0 wt.% R''2O3, where R2O + R'O is between about 2-35 wt.%, Ta2O5 + Nb2O5 is between about 8-85 wt.%, R is selected from a group consisting of Li, Na, K, and combinations thereof, R' is selected from a group consisting of Ba, Sr, Ca, Mg, Zn, Pb, and combinations thereof, and R'' is a rare earth element. The present invention also relates to use of the glass matrix in forming optic waveguides such as optic amplifiers. The present invention further relates to a transparent glass ceramic that contains pyrochlore, perovskite, or a combination thereof as its major crystal phase, and includes 4-40 wt.% SiO2, 1-15 wt.% Al2O3, 0-20 wt.% K2O, 0-12 wt.% Na2O, 0-5 wt.% Li2O, 8-85 wt.% Ta2O5, and 0-45 wt.% Nb2O5, wherein Ta2O5 + Nb2O5 is at least about 20 wt.% and (K2O + Li2O + Na2O) is between about 5-20 wt.%. Also disclosed is a method of making the glass ceramic and use of the glass ceramic as a ferro-electric component in electro-optical devices or as a filtering core in an optical filtering device.

Description

field of invention [0001] This invention relates to novel tantalum-containing glasses and glass-ceramics, and methods of making these glasses and glass-ceramics. Background of the invention [0002] The growing demand for improved fiber optic components in communication systems and medical devices has led to the need for new types of glass. The communications industry utilizes waveguide amplifiers to boost optical signals that weaken along the length of fiber optic communications paths. Optical communication systems typically operate in two separate wavelength bands, namely around 1300 nm and around 1550 nm. These fiber optics use glasses doped with rare earth elements. Doping with rare earth elements can usually produce glass materials with efficient and low-loss optical transmission and amplification in the desired fluorescence wavelength band. For example, erbium has been used as a dopant in amplifiers operating in the 1550nm band, while neody...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00C03C3/062C03C3/097C03C10/00C03C10/02G02B1/00H01S3/17
CPCC03C10/0009C03C3/062C03C10/0072C03C3/097
Inventor B·G·艾特肯G·H·比尔N·F·博雷利M·J·德内卡
Owner CORNING INC
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