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Prepn process of superfine xonotlite fiber

A technology of tobermorite and fiber, which is applied in the field of preparation of ultrafine tobermorite fibers and can solve the problem of high cost

Inactive Publication Date: 2005-07-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the currently prepared xonotlite fibers have a diameter of more than 200 nanometers. If it is to be 200 nanometers, high-quality chemical raw materials with high cost must be used.

Method used

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  • Prepn process of superfine xonotlite fiber
  • Prepn process of superfine xonotlite fiber

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Experimental program
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Embodiment Construction

[0017] Calcium raw materials and siliceous raw materials (the main particle size is 5--20μm, d 50 The main chemical composition is shown in Table 1.

[0018] Table 1 Chemical Composition of Raw Materials

[0019] raw material

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

K 2 o

Na 2 o

TiO 2

Burn out

lime

5.14

0.60

0.23

87.35

5.39

0.07

0.07

0.01

0.52

Powder Quartz

99.01

0.07

0.05

0.02

0.01

0.02

0.04

0.01

0.64

[0020] 1. Digest the lime in water at 40°C and soak it for 10 days to convert it into Ca(OH) 2 , and then pass through a 200-mesh sieve to remove impurities. Determination of effective CaO content. The method is to stir the clarified lime slurry evenly, first use a specific gravity meter to measure its specific gravity, then take 50ML of mortar and put it in a conical flask, an...

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Abstract

The present invention belongs to the field of inorganic non-metal material, and is especially the preparation process of superfine xonotlite fiber. The present invention adopts natural quartz powder as silicon material, common lime as calcium material and zirconium oxychloride as additive. The preparation process includes slaking lime in water over 40 deg.c into Ca(OH)2, 200-mesh sieving, adding quartz powder in the Ca / Si molar ratio in slurry of 0.94-0.99, adding zirconium oxychloride and water in the molar ratio between Zr ion and Ca ion plus Si ion of 0.01-0.07 and water / solid weight of 1 to 20-40; heating the compounded slurry in high pressure reactor to 190-220 deg.c while stirring and maintaining the temperature for 3-8 hr under stirring and pressure of 1.7-2.4 MPa; cooling and stoving to obtain superfine xonotlite fiber. The present invention has simple technological process, low material cost and wide application foreground.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a preparation method of ultrafine xonotlite fibers. technical background [0002] At present, the representative inorganic fibers are mainly asbestos and glass fiber, but asbestos is gradually abandoned due to its harmfulness, and glass fiber is not suitable for use in environments above 500 °C. At the same time, the cost of glass fiber is high. Xonotlite fiber has the characteristics of high temperature resistance above 800°C, large specific surface area, and large surface energy, resulting in small size effects, surface or interface effects, quantum size effects, macroscopic quantum tunneling effects, etc., in terms of chemical and physical properties exhibit specificity. [0003] The hydrothermal dynamic method is an advanced method in the production of xonotlite secondary particles. At present, most developed countries adopt this process to produce xonotlite....

Claims

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Application Information

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IPC IPC(8): C03B37/00C03B37/01
Inventor 倪文陈淑祥朱林董文辉
Owner UNIV OF SCI & TECH BEIJING
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