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Method for preparing zirconia gradient porous ceramics with ice as template

A gradient porous, zirconia technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of complex preparation process, high cost, easy production, etc., achieve simple operation process, reduce sintering temperature, and avoid environmental pollution Effect

Inactive Publication Date: 2012-04-25
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods often have the following disadvantages: firstly, the preparation process is complicated and sintering is difficult due to its inhomogeneous structure; secondly, the prepared sample structure is not a completely ideal gradient structure, and various defects are prone to occur
These shortcomings, especially the high cost severely limit the application of gradient porous ceramics

Method used

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  • Method for preparing zirconia gradient porous ceramics with ice as template
  • Method for preparing zirconia gradient porous ceramics with ice as template
  • Method for preparing zirconia gradient porous ceramics with ice as template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: see figure 1 :

[0039] ① First, weigh 100g zirconia powder (Sinopharm Chemical Reagent Co., Ltd.), 200g distilled water, 30g Na 2 SiO 3 9H 2 O binder (Chengdu Jinshan Chemical Reagent Co., Ltd.), 3g yttrium oxide and 2.6g HFXZ-802 type ceramic powder water system dispersant (Hefei Xiangzheng Chemical Technology Co., Ltd.), put into a stainless steel ball mill jar, and add 650g stainless steel Grind the balls, and then use the KQM-X4 / B planetary four-head fast ball mill to carry out full ball milling and mixing for 12 hours to form a stable suspension. The speed of the ball mill is 600 rpm. The ball mill was cooled for 1 hour.

[0040]②Secondly, put the suspension into a closed container connected to a vacuum pump to get rid of the air bubbles generated by the suspension during ball milling;

[0041] ③ Afterwards, inject the suspension into a polypropylene mold, and then place the mold in a vacuum freeze dryer (produced by Beijing Sihuan Scientific In...

Embodiment 2

[0048] ① First, weigh 100g zirconia powder (Sinopharm Chemical Reagent Co., Ltd.), 200g distilled water, 30g Na 2 SiO 3 9H 2 O binder (Chengdu Jinshan Chemical Reagent Co., Ltd.), 3g yttrium oxide and 2.6g HFXZ-802 type ceramic powder water system dispersant (Hefei Xiangzheng Chemical Technology Co., Ltd.), put into a stainless steel ball mill tank, add 650g stainless steel mill Balls, then use the KQM-X4 / B planetary four-head fast ball mill to carry out full ball milling and mixing for 12 hours, and configure it into a stable suspension. Let cool for 1 hour.

[0049] ②Secondly, put the suspension into a closed container connected to a vacuum pump to get rid of the air bubbles generated by the suspension during ball milling;

[0050] ③ Afterwards, inject the suspension into a polypropylene mold, and then place the mold in a vacuum freeze dryer (produced by Beijing Sihuan Scientific Instrument Factory Co., Ltd., model: LGJ-10D) at -30°C to completely freeze the suspension ,...

Embodiment 3

[0061] ① First, weigh 100g zirconia powder (Sinopharm Chemical Reagent Co., Ltd.), 300g distilled water, 30g Na 2 SiO 3 9H 2 O binder (Chengdu Jinshan Chemical Reagent Co., Ltd.), 3g yttrium oxide and 2.6g HFXZ-802 type ceramic powder water system dispersant (Hefei Xiangzheng Chemical Technology Co., Ltd.), put into a stainless steel ball mill tank, add 650g stainless steel mill Balls, then use the KQM-X4 / B planetary four-head fast ball mill to carry out full ball milling and mixing for 12 hours, and configure it into a stable suspension. Let cool for 1 hour.

[0062] ②Secondly, put the suspension into a closed container connected to a vacuum pump to get rid of the air bubbles generated by the suspension during ball milling;

[0063] ③Afterwards, inject the suspension into a polypropylene mold, and then place the mold in a vacuum freeze dryer (produced by Beijing Sihuan Scientific Instrument Factory Co., Ltd., model: LGJ-10D) at -30°C to completely freeze the suspension , ...

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Abstract

The invention relates to a method for preparing zirconia gradient porous ceramics with ice as a template. The method comprises: taking ice as a pore-forming template, adding distilled water, a Na2SiO3.9H2O binder, a yttrium oxide sintering aid and a ceramic powder water system dispersant into zirconia powder, conducting ball milling and mixing so as to obtain a stable suspending liquid, which, after vacuum pumping, is injected into a die for low temperature rapid freezing, carrying out vacuum freeze drying to a frozen sample, performing demoulding and then put it into a high temperature furnace for sintering, thus obtaining zirconia porous ceramics. The pore structure of the porous ceramics is completely decided by appearance characteristics of ice crystals. Compared with other porous preparation technologies, ice is an ideal template for making porous ceramics, and the process of the invention is characterized by environmental protection and low cost. The prepared zirconia porous ceramics have obvious gradient porous structures. The use of a binder in the invention can prevent a green body from cracking and deforming during drying, thus enhancing the mechanical strength of products. And adding of a yttrium oxide sintering aid can lower the sintering temperature. The prepared zirconia porous ceramics has compressive strength up to 8MPa.

Description

technical field [0001] The invention relates to a method for preparing porous ceramics, more particularly, a method for preparing zirconia gradient porous ceramics using ice as a template. Background technique [0002] Porous ceramics have relatively evenly distributed micropores, low bulk density, three-dimensional network skeleton structure, high specific surface area and unique physical surface properties, and have good selective permeability, energy absorption or pressure resistance for liquid and gas media Features, high temperature resistance, corrosion resistance, etc., can be widely used in gas-liquid filtration, catalyst carrier, purification and separation, sound absorption and shock absorption, advanced thermal insulation products, biological implants, etc. [0003] With the development of science and technology and industrial production, higher requirements are put forward for the research and development of liquid and solid separation technology, and microporous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/48C04B35/622
Inventor 艾桃桃冯小明张义明张营堂
Owner SHAANXI UNIV OF TECH
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