Preparation method of functionalized fused quartz powder for preparing quartz ceramics and functionalized fused quartz powder

A technology for fused silica powder and quartz ceramics, which is applied in the field of functionalized fused silica powder, can solve the problems of being difficult to remove, difficult to adapt to large-scale production requirements, etc., and achieves the effects of increased density, energy-saving and high-efficiency raw materials, and simple and stable operation.
CN106927801AActive Publication Date: 2017-07-07HUNAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV OF TECH
Publication Date
2017-07-07

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Abstract

The invention discloses a preparation method of functionalized fused quartz powder for preparing quartz ceramics and the functionalized fused quartz powder. According to the preparation method of the functionalized fused quartz powder for preparing the quartz ceramics, products obtained after thermal decomposition of sucrose are used as carbon sources, in the atmosphere of nitrogen, through carbothermal nitridation reduction reaction, a sintering additive is formed through in-situ synthesis on the surface of fused quartz powder, the obtained functionalized fused quartz powder is used for the preparation and shaping of fused ceramics, and compared with mechanical addition of the sintering additive, the obtained functionalized fused quartz powder can be distributed more evenly in a matrix; meanwhile, because a trace amount of oxygen in the fused powder can be consumed in the process of functionalized treatment, and a crystallization phenomenon is inhibited to a certain degree; the volume density of the obtained fused quartz ceramics prepared from the obtained functionalized fused quartz powder is 1.96 g / cm<3>, and the fracture resistance reaches 43.5 MPa. The preparation method is simple and stable to operate, low in energy consumption and economical and environmentally friendly, and the used raw materials are cheap and easy to get, and the preparation method is suitable for industrial production.
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Description

technical field

[0001] The invention relates to the technical field of quartz ceramics preparation, and more specifically, relates to a preparation method of functionalized fused silica powder used in the preparation of quartz ceramics and the functionalized fused silica powder. Background technique

[0002] Quartz ceramics have the advantages of poor thermal conductivity, small expansion coefficient, high temperature resistance, good thermal stability, and low cost. They have been widely used in metallurgy, building materials, chemical industry, national defense, scientific research and other fields. There are two types of quartz ceramics: one is prepared from crystalline quartz (quartz sand or crystal) at 1600 °C, and the other is fused silica ceramics prepared at 1200 °C from pulverized fused silica.

[0003] Compared with other structural ceramics, fused silica ceramics have the defects of low volume density and poor mechanical properties. This is due to the lack of orga...

Claims

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