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Sandy kaolin based cordierite glass ceramic material and low-temperature preparation method thereof

A soil-based cordierite and glass-ceramic technology, which is applied in the field of low-temperature co-fired ceramic substrate materials, can solve the problems of increasing energy consumption, polluting the environment, reducing the utilization rate of sandy kaolin, and achieving energy saving and high flexural strength. , the effect of improving utilization and added value

Active Publication Date: 2017-03-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the traditional kaolin utilization method, the raw ore must be desanded and purified, which will produce a large amount of tailings, greatly reducing the utilization rate of sandy kaolin, and at the same time, increasing energy consumption and polluting the environment

Method used

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  • Sandy kaolin based cordierite glass ceramic material and low-temperature preparation method thereof
  • Sandy kaolin based cordierite glass ceramic material and low-temperature preparation method thereof
  • Sandy kaolin based cordierite glass ceramic material and low-temperature preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The chemical composition (mass percentage) of sandy kaolin:

[0026] SiO 2 —70-76%, Al 2 o 3 —14-20%, K 2 O—3-5%, Na 2 O—0-0.2%, CaO—0-0.1%, MgO—0-0.1%, Fe 2 o 3 —0.5-1%, MnO—0-0.02%, P 2 o 5 —0-0.02%, TiO 2 —0.3-0.5%;

[0027] The sandy kaolin meeting the requirements of the above components is first crushed, then wet-milled with a planetary mill to a mesh size below 100, and then dried to obtain sandy kaolin powder. Get sandy kaolin powder 30g, add analytically pure MgO, Al in the sandy kaolin powder 2 o 3 and SiO 2 , so that MgO, Al in raw materials 2 o 3 and SiO 2 The molar ratio is 2.5:2:5, then add NH 4 h 2 PO 4 and H 3 BO 3 , such that P 2 o 5 +B 2 o 3 The mass percentage of the glass is 5-6%, fully mixed to prepare the raw material of the glass precursor;

[0028] Pour the raw material of the glass precursor into a corundum crucible, place the corundum crucible in a high-temperature furnace, keep it warm at 1550°C for 4 hours to fully me...

Embodiment 2

[0036] The chemical composition (mass percentage) of sandy kaolin:

[0037] SiO 2 —70-76%, Al 2 o 3 —14-20%, K 2 O—3-5%, Na 2 O—0-0.2%, CaO—0-0.1%, MgO—0-0.1%, Fe 2 o 3 —0.5-1%, MnO—0-0.02%, P 2 o 5 —0-0.02%, TiO 2 —0.3-0.5%;

[0038] The sandy kaolin meeting the requirements of the above components is first crushed, then wet-milled with a planetary mill to a mesh size below 100, and then dried to obtain sandy kaolin powder. Get sandy kaolin powder 40g, add analytically pure MgO, Al in sandy kaolin powder 2 o 3 and SiO 2 , so that MgO, Al in raw materials 2 o 3 and SiO 2 The molar ratio is 2.3:2:5, then add NH 4 h 2 PO 4 and H 3 BO 3 , such that P 2 o 5 +B 2 o 3 The mass percentage is 5-6%, fully mixed to prepare glass precursor raw materials;

[0039] Pour the raw material of the glass precursor into a corundum crucible, place the corundum crucible in a high-temperature furnace, keep it warm at 1550°C for 5 hours to fully melt, take it out directly at...

Embodiment 3

[0047] The chemical composition (mass percentage) of sandy kaolin:

[0048] SiO 2 —70-76%, Al 2 o 3 —14-20%, K 2 O—3-5%, Na 2 O—0-0.2%, CaO—0-0.1%, MgO—0-0.1%, Fe 2 o 3 —0.5-1%, MnO—0-0.02%, P 2 o 5 —0-0.02%, TiO 2 —0.3-0.5%;

[0049] The sandy kaolin meeting the requirements of the above components is first crushed, then wet-milled with a planetary mill to a mesh size below 100, and then dried to obtain sandy kaolin powder. Get sandy kaolin powder 50g, add analytically pure MgO, Al in the sandy kaolin powder 2 o 3 and SiO 2 , so that MgO, Al in raw materials 2 o 3 and SiO 2 The molar ratio is 2.1:2:5, then add NH 4 h 2 PO 4 and H 3 BO 3 , such that P 2 o 5 +B 2 o 3 The mass percentage is 5-6%, fully mixed to prepare glass precursor raw materials;

[0050] Pour the raw material of the glass precursor into a corundum crucible, place the corundum crucible in a high-temperature furnace, keep it warm at 1550°C for 6 hours to fully melt, take it out directl...

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Abstract

The invention relates to a sandy kaolin based cordierite glass ceramic material. The sandy kaolin based cordierite glass ceramic material is prepared from raw materials in percentage by mass as follows: 25%-50% of sandy kaolin, 20%-26% of aluminum oxide, 7%-28% of silicon oxide, 10%-15% of magnesium oxide and 5%-7% of an aid. The invention further relates to a preparation method of the sandy kaolin based cordierite glass ceramic material. The glass ceramic material only contains a single physical phase which is alpha-cordierite phase, belongs to a magnesia-alumina-silica system and has a good physical property. The preparation method adopts a simple technological procedure, the sources of raw materials are abundant, aluminum-silicon elements in natural sandy kaolin are used as sources of elements for cordierite glass ceramic, sand removal and purification are not required, no tailings are produced, energy is saved, and the environment is protected; meanwhile, impurity ingredients in the sandy kaolin serve as an aid, can reduce the sintering temperature, reduce pores and promote generation of the alpha-cordierite phase and implementation of low-temperature co-sintering, and has great significance in industrial production.

Description

technical field [0001] The invention relates to a low-temperature co-fired ceramic substrate material, in particular to a sandy kaolin-based cordierite glass-ceramic material and a low-temperature preparation method thereof. Background technique [0002] Low-temperature co-fired ceramics (LTCC) technology is a technology that uses low-temperature co-sintered ceramics as a substrate, assembles various components and low-resistivity wires on it, and sinters below 1000°C to produce microelectronic products. Low-temperature co-fired ceramic technology (LTCC) is currently the mainstream technology for preparing multilayer electronic devices and the mainstay of passive integration technology. LTCC technology has the following main requirements for substrate materials: (1) The sintering temperature is lower than 950°C, so as to achieve co-firing with metal wires with low resistivity and low melting point such as Cu, Ag, and Au; (2) Low dielectric constant , low dielectric loss. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/08C03B32/02C03C6/04C03C6/02
CPCC03B32/02C03C1/00C03C10/0045
Inventor 李珍宋丽黄焱球沈毅李飞李光辉蒋世军
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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