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Preparation of zirconium tungstate ceramic body products thereby and optical fiber grating temperature compensator

A technology of zirconium tungstate and ceramic body, which is applied in the coupling of optical waveguides and other directions, can solve the problems of lengthy and cumbersome preparation time, achieve the effect of reducing preparation steps, reducing production costs, and good uniformity

Inactive Publication Date: 2003-04-02
BROPTICS TECHNOLOGY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it must use a solvent to adjust the pH of the solution to obtain Zr 4+ with W 6+ The precipitate, and the step of heat treatment of the precipitate is required, so the preparation time is lengthy and cumbersome

Method used

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  • Preparation of zirconium tungstate ceramic body products thereby and optical fiber grating temperature compensator
  • Preparation of zirconium tungstate ceramic body products thereby and optical fiber grating temperature compensator
  • Preparation of zirconium tungstate ceramic body products thereby and optical fiber grating temperature compensator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Preparation of zirconium tungstate ceramic substrate——without adding zirconium tungstate single crystal powder

[0069] ZrO 2 Micropowder and WO 3 The micropowder is mixed at a molar ratio of 1:2, and an organic binder is added, ground and mixed with deionized water, and the evenly mixed slurry is dried at 105°C, and 25 grams of the dried powder is dry-pressed Press into a plate-shaped green body of 60 mm × 35 mm, react and sinter at 1200 ° C for 6 hours, and then quench in air to obtain a single-phase ZrW 2 o 8 ceramic body. The thermal expansion coefficient of the zirconium tungstate ceramic body is -10.02×10 at the temperature of -40°C to 80°C measured by a low-temperature thermal dilatometer. -6 K -1 , the expansion and contraction of the ceramic body with temperature is as follows Figure 4 The curve d is shown. After the two sides of the zirconium tungstate ceramic substrate are ground flat and reach the required thickness, they are then cut into the size r...

Embodiment 2

[0071] Preparation of zirconium tungstate ceramic substrate - adding zirconium tungstate single crystal powder

[0072] ZrO 2 Micropowder and WO 3 The micropowder is proportioned at a molar ratio of 1:2, and 1.0% by weight of zirconium tungstate single crystal powder is added as the crystal seed of zirconium tungstate grains generated during reaction sintering, and these raw materials are ground and mixed with deionized water, and Add organic binder and mix evenly, then dry. Take 25 grams of the mixed raw material powder and press it into a plate-shaped green body of 60 mm × 35 mm by dry pressing, react and sinter at 1150 ° C for 4 hours, and then quench in air to obtain a single-phase ZrW 2 o 8 Ceramic body, sintering temperature and sintering time are significantly reduced. The thermal expansion coefficient of this ceramic body is -10.85×10 -6 K -1 , which expands and contracts with temperature as Figure 4 The curve e is shown. After the two sides of the zirconium t...

Embodiment 3

[0074] Fine-tuning the coefficient of thermal expansion of zirconium tungstate ceramic substrates using non-stoichiometric ZrO 2 with WO 3

[0075] 10.4 g of ZrO 2 Micronized powder and 31.6 grams of WO 3 The fine powder is ground and mixed with deionized water, and an organic binder is added, and then the slurry is dried at 105°C. The preparation and processing steps after drying are the same as in Example 1, and the thermal expansion coefficient of the obtained ceramic body is -9.51 ×10 -6 K -1 , which expands and contracts with temperature as Figure 4 The curve c is shown.

[0076] If adding zirconium tungstate seeds to further reduce the sintering temperature and time, use 10.316 grams of ZrO 2 Micronized, 31.284 g of WO 3 micronized powder and 0.4 g of ZrW 2 o 8 The micropowder is the raw material, and the subsequent mixing steps are the same as above. However, due to the addition of seed crystals, the obtained plate-shaped green body can be reacted and sinter...

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Abstract

A process for preparing zirconium tungstate (ZrW2O8) ceramics includes the reacting between the superfine Zr compound and W compound particles and sintering, and features that the powdered monocrystal of ZrW2O8 is used as the crystal seeds in said reaction for simplifying process, shortening period and lowering sinter temp and cost. A modified ZrW2O8 ceramics with regulated thermal expandability is prepared by generating the second phase in the ZrW2O8 ceramics and can be used for the temp compensator of fibre Bragg garting (FBG).

Description

technical field [0001] The invention relates to the preparation of a zirconium tungstate ceramic body, the provision of a modified zirconium tungstate ceramic body and the application of the zirconium tungstate ceramic body in a FBG temperature compensation device. Background technique [0002] Fiber Bragg Grating (FBG) is widely used in the manufacture of various components of high-density wavelength division multiplexer network (DWDM), such as fiber Bragg grating stabilized laser light source, and used in multiplexers, demultiplexers and Various DWDM devices in add / drop filters. However, in practical applications, the rise in ambient temperature will have an impact on the FBG. Since the inter-grid width and the refractive index of the FBG determine the center frequency of the reflected light, it must be very precise in design and manufacture. When the temperature of the surrounding environment rises, the refractive index of the optical fiber changes accordingly, making t...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622G02B6/34
Inventor 温惠玲林永生罗裕龙
Owner BROPTICS TECHNOLOGY LTD
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