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Solid-phase firing method for synthesizing ceramic powder material

A technology of solid-phase combustion and powder materials, applied in the field of ceramics, can solve the problems of difficulty in preparing ceramic powder materials, limiting the types of preparation materials, and difficulty in obtaining nitrates, etc., and achieves reduction of waste discharge, narrow particle size distribution, and economical energy effect

Inactive Publication Date: 2009-12-09
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the widely used combustion method uses the combination of nitrate and organic matter to prepare ceramic powder materials. During the synthesis and preparation process, toxic gases such as NO2 are produced, which seriously pollutes the environment; and the nitrate of some elements is not easy to obtain, which also limits the preparation of materials. types; and it is not easy to prepare a large amount of ceramic powder materials, which limits the application in industry

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  • Solid-phase firing method for synthesizing ceramic powder material
  • Solid-phase firing method for synthesizing ceramic powder material
  • Solid-phase firing method for synthesizing ceramic powder material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1, adopting solid phase combustion process to synthesize and prepare SrBi 1 Ti 4 o 15 (SBTi) powder material

[0021] The raw materials used in the synthesis can be: strontium carbonate (SrCO 3 ), bismuth oxide (Bi 2 o 3 ) and titanium dioxide (TiO 2 ), organic matter uses citric acid (C 6 h 8 o 7 h 2 O). Weigh the oxide and carbonate precursors required for the preparation of the material according to the molar ratio of the chemical formula (1) for the preparation of the product. And weigh the citric acid according to the molar ratio of organic matters and metal ions in the range of 1.5-3.0:1. According to the chemical reaction of chemical equation (1), such as preparing 1 mole of SBTi powder material, drop into 1 mole of SrCO 3 , 2 moles of Bi 2 o 3 , 4 mol TiO 2 , 13.5 mol of C 6 h 8 o 7 h 2 O. After ball milling and mixing for 4 hours, dry at 80°C, and then in a high-temperature muffle furnace, the oxygen atmosphere is 97% oxygen, and ...

Embodiment 2

[0023] Embodiment 2, using the solid phase combustion process to synthesize and prepare SrBi 1 Ti 1 o 15 (SBTi) powder material

[0024] The raw materials used in the synthesis can be: strontium oxide (SrO), bismuth oxide (Bi 2 o 3 ), titanium dioxide (TiO 2 ), organic matter uses glucose (C 6 h 12 o 6 ). Weigh the oxide precursor required for the preparation of the material according to the molar ratio of the chemical formula (2) for the preparation of the product. And weigh the citric acid according to the molar ratio of organic matters and metal ions in the range of 1.5-3:1. According to the chemical reaction of chemical equation (2), such as preparing 1 mole of SBTi powder material, drop into 1 mole of SrO, 2 moles of Bi 2 o 3 , 4 mol TiO 2 , 27 moles of C 6 h 12 o 6 . After ball milling and mixing for 4 hours, dry at 100°C, and then in a high-temperature muffle furnace, the oxygen atmosphere is 21% oxygen, and the temperature is raised to 550°C for spontan...

Embodiment 3

[0030] Example 3, this example uses the solid phase combustion method to synthesize and prepare SrFeCo0.50x (SFC) powder

[0031] The raw materials used in the synthesis can be: strontium carbonate (SrCO 3 ), iron oxide (Fe 2 o 3 ) and cobalt oxide (CoO), organic matter using glucose (C 6 h 12 o 6 ). Weigh the carbonate and oxide precursors required for the preparation of the material according to the molar ratio of the chemical formula (3) for the preparation of the product. And weigh C according to the molar ratio of organic matter to metal ion in the range of 1.5-3:1 6 h 12 o 6 . According to the chemical equation (3), it can be seen that if 1 mole of SFC powder material is prepared, 1 mole of SrCO 3 , 0.5 mol Fe 2 o 3 , 0.5 mol of CoO, 5 mol of C 6 h 12 o 6 . After ball milling and mixing for 2 hours, dry at 120°C, and then in a high-temperature muffle furnace, the oxygen atmosphere accounts for 56% oxygen, the temperature is raised to 500°C for ignition, a...

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Abstract

The invention discloses a solidoid burning method for synthetical ceramic powder material, synoptically, such method is that the insoluble salt precursor is mixed with an organic matter equally, and then is burnt in oxygen ambient to get the necessary ceramic powder material after being dried. The insoluble salt precursor is weighted according to the stoichiometric proportion, and the organic matter is weighted in accordance with the mol ratio scope of the organic matter and the metal ion of 1.5-3.0:1; and the insoluble salt precursor is mixed with the organic matter equally, and then is burnt in the oxygen ambient of the ratio of oxygen and air of 0.2-1:1 so as to get the necessary ceramic powder material after being dried. The solidoid burning method for such synthetical ceramic powder material has the advantages of low production cost and energy conservation without environment pollution, thereby the invention can be applicable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of preparation technology of ceramic powder materials, and in particular relates to a solid-phase combustion method for synthesizing ceramic powder materials, the ceramic powder materials synthesized by the method and ceramics prepared by using the materials. Background technique [0002] Compared with metals and plastics, ceramic materials have excellent high temperature resistance, corrosion resistance, wear resistance and good electrical properties, etc., and are widely used in cutting-edge technology fields, such as space technology, marine technology and bioengineering fields ( Su Yi, Huang Yunxiang, Yunnan Chemical Industry, 1997.2, 13). One of the basic characteristics of the ceramic manufacturing process is to use powder as raw material to form a polycrystalline sintered body after molding and sintering. The quality of ceramic powder directly affects the quality of the final product, so the primary problem in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/64
Inventor 徐志军初瑞清
Owner LIAOCHENG UNIV