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Preparation method of foamed ceramic material, and foamed ceramic material and applications thereof

A foam ceramic and ceramic-based technology, applied in the field of optical absorption, can solve the problems of increased detection cost, high detector performance requirements, low optical signal transmittance, etc., achieve low production cost, good corrosion resistance, and enhanced optical signal The effect of transmittance

Inactive Publication Date: 2020-05-22
WUHAN MIZI ENERGY SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of such media will directly lead to extremely low transmittance of optical signals, and the performance requirements of the matching detectors are quite high, thus greatly increasing the detection cost.

Method used

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  • Preparation method of foamed ceramic material, and foamed ceramic material and applications thereof
  • Preparation method of foamed ceramic material, and foamed ceramic material and applications thereof
  • Preparation method of foamed ceramic material, and foamed ceramic material and applications thereof

Examples

Experimental program
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Effect test

preparation example

[0032] This embodiment records a preparation example of the foamed ceramic material, which specifically includes:

[0033] (1) Foam pretreatment: immerse polyurethane foam in a sodium hydroxide solution with a mass percentage of 20wt%, hydrolyze it at 50°C for 5 hours, repeatedly knead and rinse with water, and put it in mass percentage Soak in 10% carboxymethyl cellulose solution for 3 hours to change the surface properties of the polyurethane foam, take it out, squeeze to remove the excess carboxymethyl cellulose solution, wash with water, and dry to obtain modified polyurethane foam;

[0034] (2) Slurry configuration: Dissolve the dispersant in the solvent, add rheological agents, binders and sintering aids, and mix them evenly; then add the ceramic base material, pre-stir it for 15 minutes to make it uniform, and then add ammonia to improve its Fluidity, and then ultrasonically oscillate to make it evenly dispersed to obtain slurry. In this embodiment, the dispersant is gum ar...

Embodiment 2

[0039] This embodiment records another preparation example of the foamed ceramic material, which specifically includes:

[0040] (1) Foam pretreatment: immerse polyurethane foam in a sodium hydroxide solution with a mass percentage of 10wt%, hydrolyze it at 40°C for 2 hours, repeatedly knead and rinse with water, and put it in mass percentage Soak it in 0.5% carboxymethyl cellulose solution for 5 hours to change the surface properties of the polyurethane foam, take it out, squeeze to remove the excess carboxymethyl cellulose solution, wash with water, and dry to obtain modified polyurethane foam;

[0041] (2) Slurry configuration: Dissolve the dispersant in the solvent, add rheological agents, binders and sintering aids, and mix well; then add the ceramic base material, pre-stir it for 5-15 minutes to make it uniform, and then add ammonia Improve its fluidity, and then ultrasonically oscillate to make it evenly dispersed to obtain slurry. In this embodiment, the dispersant is gum ...

Embodiment 3

[0046] This embodiment records another preparation example of the foamed ceramic material, which specifically includes:

[0047] (1) Foam pretreatment: immerse the polyurethane foam in a sodium hydroxide solution with a mass percentage of 15wt%, hydrolyze it at 60°C for 3 hours, knead repeatedly and rinse with water, then put in the surfactant SurfynolTG Soak it in the medium for 1 hour to change the surface properties of the polyurethane foam, take it out, squeeze to remove the excess carboxymethyl cellulose solution, wash with water, and dry to obtain the modified polyurethane foam;

[0048] (2) Slurry configuration: Dissolve the dispersant in the solvent, add rheological agents, binders and sintering aids, and mix well; then add the ceramic base material, pre-stir it for 5-15 minutes to make it uniform, and then add ammonia Improve its fluidity, and then ultrasonically oscillate to make it evenly dispersed to obtain slurry. In this embodiment, the dispersant is Darvanc (25% pol...

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Abstract

The invention relates to the technical field of optical absorption, and provides a preparation method of a foamed ceramic material, and the prepared foamed ceramic material and applications thereof. The preparation method provided by the invention comprises the steps of foam pretreatment, slurry preparation, slurry coating, sintering and the like. According to the invention, the foamed ceramic material with high reflectivity and adjustable porosity is sintered by taking polyurethane foam as a skeleton, so that the effect of remarkably increasing an equivalent optical path with a small volume can be realized so as to achieve the precise meadurement of the infiltrated atmosphere; and when the foamed ceramic material is used for preparing an optical absorption cell in an absorption spectrum analysis instrument, the technical effects of remarkably increasing a laser optical path and enhancing the laser signal transmittance can be achieved with low production cost, so that good measurementperformance is realized.

Description

【Technical Field】 [0001] The present invention relates to the technical field of optical absorption, in particular to a preparation method of a foamed ceramic material, a foamed ceramic material and its application. 【Background technique】 [0002] Industrial gas analysis and monitoring technology based on absorption spectroscopy technology has been widely developed and applied. Among them, the more typical is the semiconductor laser absorption spectroscopy (TDLAS, Tunable Diode Laser Absorption Spectroscopy), which mainly uses the narrow linewidth and wavelength of the tunable semiconductor laser to change with the injection current to achieve single or several distances to molecules. It is difficult to distinguish absorption lines for measurement. In TDLAS technology, in order to achieve the measurement of low-concentration gases and obtain a strong absorption curve, from the Beer-Lambert law directly, there are two ways to increase absorption: one is to select a strong absorpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B35/10C04B35/48C04B35/622C04B35/626C04B35/64G01N21/03
CPCC04B35/10C04B35/48C04B35/622C04B35/62605C04B35/64C04B38/106G01N21/03C04B38/0074C04B38/0051
Inventor 胡雪蛟李瑶何岸
Owner WUHAN MIZI ENERGY SCI & TECH CO LTD
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