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Low-expansion building ceramic material and preparation method thereof

A low-expansion technology for architectural ceramics, applied in the field of ceramic materials, can solve problems such as poor thermal shock resistance, cracking of green bodies, shortened service life, etc., and achieve the effect of low thermal expansion coefficient

Inactive Publication Date: 2017-04-26
苏州耐思特塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional building ceramic materials will have cracks and other phenomena after long-term use, resulting in shortened service life. This is due to their large thermal expansion coefficient and poor thermal shock resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] S1: 5 parts of alumina, 7 parts of magnesium oxide, 3 parts of titanium dioxide, 4 parts of germanium pentoxide, 3 parts of manganese dioxide, 4 parts of molybdenum tungstate, 2 parts of niobium phosphate, 1 part of vanadium silicate, 2 parts of tin sulfate Crush 5 parts of Astragalus vulgaris to 80 meshes, add 10 parts of ethyl orthosilicate, and stir at a rate of 800r / min for 40min to a uniform state;

[0020] S2: Put the material obtained in step S1 in a hot-pressing furnace, firstly heat up to 500°C at a rate of 20°C / min, and hold for 30 minutes; then heat up to 900°C at a rate of 40°C / min, and hold for 30 minutes; The temperature is raised to 1300°C at 15°C / min, and the heat preservation reaction is performed for 1 hour; the low-expansion building ceramic material can be obtained after cooling.

[0021] After testing, the average thermal expansion coefficient of the ceramic material at 0~850℃ is 8.5×10 -7 / ℃, the flexural strength is 95Mpa.

Embodiment 2

[0026] S1: 10 parts of aluminum oxide, 10 parts of magnesium oxide, 7 parts of titanium dioxide, 8 parts of germanium pentoxide, 6 parts of manganese dioxide, 9 parts of molybdenum tungstate, 6 parts of niobium phosphate, 4 parts of vanadium silicate, 5 parts of tin sulfate Crush 11 parts of Astragalus sinensis to 100 meshes, add 20 parts of ethyl orthosilicate, and stir at a rate of 1000r / min for 30min to a uniform state;

[0027] S2: Put the material obtained in step S1 in a hot-pressing furnace, firstly heat up to 600°C at a rate of 30°C / min, and hold for 20 minutes; then heat up to 1100°C at a rate of 50°C / min, and hold for 50 minutes; The temperature is raised to 1500°C at 25°C / min, and the heat preservation reaction is 3 hours; after cooling, the low-expansion building ceramic material can be obtained.

[0028] After testing, the average thermal expansion coefficient of this ceramic material at 0~850℃ is 7.5×10 -7 / ℃, the flexural strength is 98Mpa.

Embodiment 3

[0033] S1: 6 parts of aluminum oxide, 8 parts of magnesium oxide, 4 parts of titanium dioxide, 5 parts of germanium pentoxide, 4 parts of manganese dioxide, 5 parts of molybdenum tungstate, 3 parts of niobium phosphate, 1 part of vanadium silicate, 3 parts of tin sulfate Crush 8 parts of Astragalus vulgaris to 100 meshes, add 15 parts of ethyl orthosilicate, and stir at a rate of 800r / min for 40min to a uniform state;

[0034] S2: Put the material obtained in step S1 in a hot-pressing furnace, firstly heat up to 500°C at a rate of 20°C / min, hold for 30 minutes; then heat up to 1100°C at a rate of 50°C / min, hold for 50 minutes; The temperature is raised to 1300°C at 15°C / min, and the heat preservation reaction is performed for 2 hours; the low-expansion building ceramic material can be obtained after cooling.

[0035] After testing, the average thermal expansion coefficient of this ceramic material at 0~850℃ is 7.0×10 -7 / ℃, the flexural strength is 100Mpa.

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Abstract

The invention discloses a low-expansion building ceramic material. The low-expansion building ceramic material comprises, by weight, 5-10 parts of alumina, 7-10 parts of magnesium oxide, 3-7 parts of titanium dioxide, 4-8 parts of germanium pentoxide, 3-6 parts of manganese dioxide, 4-9 parts of molybdenum tungstate, 2-6 parts of niobium phosphate, 1-4 parts of vanadium silicate, 2-5 parts of tin sulfate, 5-11 parts of Astragalus sinicus and 10-20 parts of ethyl orthosilicate. The ceramic material has the advantages of low heat expansion coefficient and high strength, the average heat expansion coefficient at 0-850 DEG C is 5.0-8.5 * 10<-7> / DEG C, and the flexural strength of the ceramic material at 0-850 DEG C is 95-105 Mpa.

Description

Technical field [0001] The invention belongs to the field of ceramic materials, and particularly relates to a low-expansion building ceramic material and a preparation method thereof. Background technique [0002] Ceramic materials are a class of inorganic non-metallic materials made of natural or synthetic compounds through forming and high-temperature sintering. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. It can be used as structural material and tool material, and because ceramics also has some special properties, it can also be used as a functional material. Common materials are sintered from natural raw materials such as feldspar, clay and quartz. They are typical silicate materials. The main components are silicon, aluminum, and oxygen. These three elements account for 90% of the total crustal elements. The source of ceramics is abundant, the cost is low, and the technology is mature. This type of ceramics ca...

Claims

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Application Information

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IPC IPC(8): C04B35/04C04B35/10C04B35/632C04B35/622
CPCC04B35/04C04B35/10C04B35/622C04B35/632C04B2235/3232C04B2235/3239C04B2235/3251C04B2235/3256C04B2235/326C04B2235/3267C04B2235/3287C04B2235/3293C04B2235/3427C04B2235/656C04B2235/96C04B2235/9607
Inventor 张雪明
Owner 苏州耐思特塑胶有限公司
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