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Method for preparing white ceramic by use of natural zeolite

A white ceramic, natural zeolite technology, applied in the field of ceramic materials, can solve the problems of poor strength and hardness, low product added value, low technical content, etc., achieve high Shore hardness, good mechanical properties and physical and chemical properties, expand Effects in the field of application

Inactive Publication Date: 2012-12-26
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is to sell zeolite powder, which is used as an additive for water treatment, feed and fertilizer or as a chemical filler. The technical content is low and the added value of the product is not high.
[0004] Using natural zeolite powder as raw material, the ceramics directly prepared are brick red, the R457 whiteness value is only 24, and the strength and hardness are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of method utilizing natural zeolite to prepare white pottery, it comprises the steps:

[0024] 1) Natural clinoptilolite (produced in No. 2 mining area of ​​Dashi particle clinoptilolite rock mining area, Nenjiang County, Heilongjiang Province) was crushed and ground to 100 mesh to obtain clinoptilolite powder.

[0025] 2) Mix 25g of clinoptilolite powder, 1.7g of NaCl, and 13.25g of NaOH, add 75mL of distilled water, ultrasonically disperse, heat in a water bath at 90°C, supplemented by electric stirring for 12h, then stand for 48h, wash and dry to obtain modified zeolite powder .

[0026] 3) Mix the clinoptilolite powder and the modified zeolite powder at a mass ratio of 2:1 (that is, the content of the modified zeolite powder in the raw material is 33.33%), press into tablets under a pressure of 20MPa, sinter at 700°C, and keep warm for 5h. The heating rate is 5°C / min, and the white zeolite ceramics are obtained by cooling with the furnace.

[0027] The wash...

Embodiment 2

[0034] A kind of method utilizing natural zeolite to prepare white pottery, it comprises the steps:

[0035] 1) Natural clinoptilolite (produced in No. 2 mining area of ​​Dashi particle clinoptilolite rock mining area, Nenjiang County, Heilongjiang Province) was crushed and ground to 100 mesh to obtain clinoptilolite powder.

[0036] 2) Mix 25g of clinoptilolite powder, 15g of NaCl, and 13.25g of NaOH, add 75mL of distilled water, and other conditions are the same as in Example 1. The R457 whiteness value recorded is 69.90, the Shore hardness is 79, and the acid resistance is 50.15%. Basicity is 48.46%, and phase is identical with embodiment 1.

Embodiment 3

[0038] A kind of pottery that utilizes natural zeolite to prepare, it comprises the steps:

[0039] 1) Natural clinoptilolite (produced in No. 2 mining area of ​​Dashi particle clinoptilolite rock mining area, Nenjiang County, Heilongjiang Province) was crushed and ground to 100 mesh to obtain clinoptilolite powder.

[0040] 2) Mix 25 g of clinoptilolite powder, 5 g of NaCl, and 4.3 g of NaOH, add 75 mL of distilled water, and other conditions are the same as in Example 1. The measured R457 whiteness value is 69.48, the Shore hardness is 68, the acid resistance is 60.34%, and the alkali resistance Degree is 59.6%, and phase is identical with embodiment 1.

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Abstract

The invention relates to a method for preparing white ceramic by the use of natural zeolite. The method for preparing white ceramic by the use of natural zeolite is characterized by comprising the following steps of: 1) crushing the natural zeolite, and grinding to 100 meshes to obtain a zeolite powder; 2) preparing a modified zeolite powder by adopting one of the following two method: (1) mixingthe zeolite powder, sodium chloride, sodium hydroxide and water according to the mass ratio of 10: (0.6-10): (2-10): 30-45, heating and stirring for 12 hours, staying for 48 hours, washing by the useof water, and drying to obtain the modified zeolite powder; (2) mixing the zeolite powder, a waste alkali liquor in caustic soda industry and water according to the mass ratio of (10-15): (6-12): 45,heating and stirring for 12 hours, staying for 48 hours, washing by the use of water, and drying to obtain the modified zeolite powder; 3) mixing the zeolite powder and the modified zeolite powder with the modified zeolite powder being 10-90 wt% of the zeolite powder and the modified zeolite powder, tabletting for moulding, and sintering at high temperature to obtain the white ceramic. By the adoption of the method, the white ceramic has high R457 white value, high acid fastness, high alkali fastness and high Shore hardness.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a method for preparing white ceramics by using natural zeolite. Background technique [0002] Zeolite is a family of hydrous aluminosilicate minerals with a framework structure, the chemical formula is: A m B p o 2p ·nH 2 O, the structural formula is A (x / q) [(AlO 2 ) x (SiO 2 ) y ]n(H 2 O), wherein: A is Ca, Na, K, Ba, Sr and other cations, B is Al and Si, q is the valence of cations, m is the number of cations, n is the number of water molecules, x is the number of Al atoms, and y is Si The number of atoms, (y / x) is usually between 1 and 5, and (x+y) is the number of tetrahedrons in the unit cell. Its chemical composition is mainly Al 2 o 3 , SiO 2 、H 2 O and alkali or alkaline earth metals, of which Al 2 o 3 +SiO2 2 About 80%. [0003] At present, most of the zeolite is used as cement mixture, which is used in the construction industry. In addition, it is also used to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/16C04B35/622C04B35/64
Inventor 李珍金成国李飞沈毅吴剑芳孙炜
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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