Method for detecting thermal shock resistance of porous ceramic

A technology of thermal shock resistance and porous ceramics, which can be used in measuring devices, strength characteristics, instruments, etc., can solve the problems of large discrete data, large influence, and difficult to prepare, and achieve uniform numerical value, wide applicability, and easy processing. Effect

Inactive Publication Date: 2018-12-14
中国建材检验认证集团淄博有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the bending strength test, it was found that due to the inappropriate sample preparation specifications and the influence of sample processing accuracy and other factors on materials of different structures, the bending strength test results obtained from the detection had large deviations; secondly, the currently widely used porous The thickness of ceramic filter tubes, filter plates and other products is mostly about 10mm, and it is difficult to prepare large-sized test samples (sample) because of the radian, so only the cross-sectional size below 10mm can be used; third, the size is in the bending strength test. In any cross-section of the sample, there are both shear force and normal stress at the same time, and

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  • Method for detecting thermal shock resistance of porous ceramic
  • Method for detecting thermal shock resistance of porous ceramic
  • Method for detecting thermal shock resistance of porous ceramic

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Embodiment 1

[0055] This embodiment provides a method for detecting thermal shock resistance of porous ceramics, comprising the following steps:

[0056] S1. A sample is obtained by cutting and processing the porous ceramic. The sample has a width of 8 mm, a thickness of 6 mm, a length of 70 mm, and a parallelism between the upper and lower surfaces of <0.02 mm.

[0057] The surface of the sample should be polished with 800 mesh or above sandpaper. When the particles of the sample are <0.1mm, the four longitudinal edges need to be chamfered.

[0058] Before the test, the sample needs to be passed through the organic solvent styrene or heated to 500 ° C for 3 hours to remove wax.

[0059] The sample is heated to the test temperature in the muffle furnace, the heating rate is less than 10°C / min, and then it is kept for 15-30 minutes and then quickly moved into the water bath for rapid cooling. The temperature of the water bath is 20±3°C, and the sample is cooled for 5-10s. Take it out, dry ...

Embodiment 2

[0079] This embodiment provides a method for detecting thermal shock resistance of porous ceramics, comprising the following steps:

[0080] S1. A sample is obtained by cutting and processing the porous ceramic. The sample has a width of 8.2 mm, a thickness of 6.2 mm, a length of 75 mm, and a parallelism between the upper and lower surfaces of <0.02 mm.

[0081] The surface of the sample should be polished with 800 mesh or above sandpaper. When the particles of the sample are <0.1mm, the four longitudinal edges need to be chamfered.

[0082] Before the test, the sample needs to pass through the organic solvent perchlorethylene or heat it to 700 ° C for 1 hour to remove the wax.

[0083] The sample is heated to the test temperature in the muffle furnace, the heating rate is less than 10°C / min, and then it is kept for 15-30 minutes and then quickly moved into the water bath for rapid cooling. The temperature of the water bath is 20±3°C, and the sample is cooled for 5-10s. Take ...

Embodiment 3

[0103] This embodiment provides a method for detecting thermal shock resistance of porous ceramics, comprising the following steps:

[0104] S1. A sample is obtained by cutting and processing the porous ceramic. The sample has a width of 7.8 mm, a thickness of 5.8 mm, a length of 80 mm, and a parallelism between the upper and lower surfaces of <0.02 mm.

[0105] The surface of the sample should be polished with 800 mesh or above sandpaper. When the particles of the sample are <0.1mm, the four longitudinal edges need to be chamfered.

[0106] Before the test, the sample needs to pass through the organic solvent trichlorethylene or heat it to 600 ° C for 2 hours to remove the wax.

[0107] The sample is heated to the test temperature in the muffle furnace, the heating rate is less than 10°C / min, and then it is kept for 15-30 minutes and then quickly moved into the water bath for rapid cooling. The temperature of the water bath is 20±3°C, and the sample is cooled for 5-10s. Take...

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Abstract

The invention relates to a method for detecting thermal shock resistance of a porous ceramic. The method comprises the following steps: cutting and processing a porous ceramic to obtain a sample, wherein the sample has a width of 8+/-0.2mm, a thickness of 6+/-0.2mm, a length of more than or equal to 70mm, and the parallelism of an upper surface and a lower surface of less than 0.02mm, the size ofthe sample has universal applicability to materials with different structures, and the problem that the existing sample size has large deviation of test values for materials with different structurescan be solved; clamping the sample on a clamp of a testing machine; detecting the thermal shock resistance of the sample by a four-point bending method to obtain test data of the thermal shock resistance of the sample; repeating the steps and gradually increasing the thermal shock temperature until the bending strength in the measured test data falls beyond product requirements or is damaged to such an extent that a bending test is difficult to perform; and obtaining thermal shock resistance data of the porous ceramic according to the test data and the thermal shock temperature. The method isscientific, reasonable, simple, feasible, fast and effective, and low in cost.

Description

technical field [0001] The invention relates to the technical field of ceramic mechanics detection, in particular to a detection method for thermal shock resistance of porous ceramics. Background technique [0002] Porous ceramic material is a kind of porous ceramic material with open pore size and high open porosity, which is made of corundum sand, silicon carbide, cordierite and other high-quality raw materials as main materials, and is prepared by molding and high-temperature sintering process. , high pressure, anti-acid, alkali and organic medium corrosion, good biological inertness, controllable pore structure and high opening porosity, long service life, good product regeneration performance, etc., can be applied to precision filtration and filtration of various media Separation, high-pressure gas exhaust silencer, gas distribution and electrolytic diaphragm, etc. [0003] First of all, due to the different preparation process, the pore structure is also different, th...

Claims

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Application Information

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IPC IPC(8): G01N3/60
CPCG01N3/60G01N2203/0023
Inventor 訾文娟周明霞翟萍吕艳红孙高梅琳
Owner 中国建材检验认证集团淄博有限公司
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