Porous ceramic with straw as pore forming agent and preparation method of porous ceramic

A technology of porous ceramics and pore-forming agents, applied in the field of porous ceramics and its preparation, can solve the problems of high preparation cost and low utilization of straw resources, achieve low volume density, increase straw demand and utilization rate, and excellent filtration effect Effect

Inactive Publication Date: 2016-07-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of high preparation cost of existing porous ceramics and low utilization of straw resources, and provide a porous ceramic using straw as a pore-forming agent and a preparation method thereof

Method used

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  • Porous ceramic with straw as pore forming agent and preparation method of porous ceramic
  • Porous ceramic with straw as pore forming agent and preparation method of porous ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing porous ceramics using straw as a pore-forming agent, specifically comprising the following steps:

[0023] (1) In parts by weight, take by weighing 54 parts of kaolin, 10 parts of industrial alumina, and 36 parts of talc for subsequent use;

[0024] (2) Add water and mix kaolin, industrial alumina and talc prepared in step (1), and stir for more than 4 hours to obtain a premixed solution;

[0025] (3) Dry the premixed solution in an electric drying oven at 105°C for 12 hours and pass it through a 200-mesh sieve to obtain a powder;

[0026] (4) Dry the wheat straw and grind it through a 200-mesh sieve, weigh 10 parts of wheat straw powder according to the weight and add it to the powder described in step (3) and mix evenly, and press the mixed powder under a pressure of 30KN get the green body;

[0027] (5) The body obtained in step (4) was dried in an electric drying oven at 105° C. for 12 hours, and then fired according to the firing schedule i...

Embodiment 2

[0030] In Example 2, the ratio by weight of kaolin, industrial alumina, talc, and wheat straw is 51:11:38:20, and other steps and parameters are the same as in Example 1. The porous ceramic sample that embodiment 2 prepares is as figure 1 As shown, the apparent porosity is 39.67%, the water absorption is 27.61%, and the bulk density is 1.68g / cm2 after analysis and testing. 3 , the flexural strength is 23MPa, and the coefficient of thermal expansion is 2.87×10 -6 / °C, the refractoriness is 1400°C.

Embodiment 3

[0032] The ratio by weight of kaolin, industrial alumina, talc, and wheat straw in Example 3 is 49:12:39:30, and other steps and parameters are the same as in Example 1. The porous ceramic sample prepared in Example 3 has an apparent porosity of 41.87%, a water absorption of 30.05%, and a bulk density of 1.51g / cm 3 , the flexural strength is 19MPa, and the coefficient of thermal expansion is 2.87×10 -6 / °C, the refractoriness is 1400°C.

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Abstract

The invention provides porous ceramic with straw as a pore forming agent and a preparation method of the porous ceramic. The method comprises the following steps: weighing 47 to 54 parts of kaolin, 10 to 13 parts of industrial alumina, and 36 to 40 parts of talc in parts by weight, mixing with water to prepare a premixed liquid, drying the premixed liquid and sieving to obtain powder, taking 10 to 50 parts of the straw which is pulverized to be mixed with the powder uniformly so as to be pressed into a green body, drying the green body and firing. The method disclosed by the invention not only develops a new way to use crop straw, and reduces the pollution caused by burning the straw to the environment, but also reduces the production cost of porous ceramic material products; produced products are high in apparent porosity, low in volume density, and high in bending strength and fire resistant temperature.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to a porous ceramic using straw as a pore-forming agent and a preparation method thereof. Background technique [0002] With the development of science and technology and industrial production, issues such as energy, resources, and three wastes treatment have attracted more attention. In particular, the rapid development of high-tech fields such as energy materials has put forward higher requirements for the research and development of liquid and solid separation technology, and microporous filtration technology and microporous filtration materials with high separation precision and high operating efficiency have become more and more popular. people's attention. Sponge ceramics is a kind of porous ceramics. It is a ceramic material with a large number of interconnected or closed pores in the body after high-temperature firing. It is a kind of ceramic material with low d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06
CPCC04B38/0675C04B33/04C04B2235/3217C04B2235/661C04B2235/9607C04B33/24
Inventor 张芳杜飞鹏徐道普
Owner WUHAN INSTITUTE OF TECHNOLOGY
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