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Preparation method of SiC-SiAlCN glass ceramics

A technology of glass-ceramic and manufacturing method, which is applied in the field of manufacturing non-oxide glass-ceramics by high-temperature pyrolysis of ceramic precursor polymer alloy

Inactive Publication Date: 2010-09-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to make the glass-ceramic can be used stably at 1400°C to 1500°C, and also to improve the existing glass-ceramic preparation method and the problems caused by changing the oxide composition of the existing glass-ceramic

Method used

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  • Preparation method of SiC-SiAlCN glass ceramics
  • Preparation method of SiC-SiAlCN glass ceramics
  • Preparation method of SiC-SiAlCN glass ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Step 1: Preparation of anhydrous toluene

[0075] Toluene C 6 H 6 and calcium hydride CaH 2 It is put into the first reaction vessel through the opening of A, refluxed at a temperature of 105°C (measured in real time by a thermometer) to remove trace water in toluene, and then distilled at 110°C (measured in real time by a thermometer) to obtain anhydrous. Toluene; add 5g of calcium hydride to 100ml of toluene;

[0076] Step 2: Preparation of liquid polyaluminosilazane (PAS)

[0077] (A) Fill the second reaction vessel with N for 10min through the A opening 2 , N 2 The flow rate is 40ml / min; (B) the aluminum hydride and polysilazane are loaded into the second reaction vessel through the opening of B; (C) the rotating speed of the tetrafluoromagnetic rotor is adjusted to be 800r / min by the magnetic stirring device; (D) After stirring and reacting for 100 min at a temperature of 22 °C, the liquid polyaluminosilazane was obtained by stirring and reacting at a tempera...

Embodiment 2

[0094] Step 1: Preparation of anhydrous toluene

[0095] Toluene C 6 H 6 and calcium hydride CaH 2 It is put into the first reaction vessel through the opening of A, refluxed at a temperature of 108 ° C (measured in real time by a thermometer) to remove trace water in toluene, and then distilled at 112 ° C (measured in real time by a thermometer) to obtain anhydrous. Toluene; 10g of calcium hydride was added to 100ml of toluene;

[0096] Step 2: Preparation of liquid polyaluminosilazane (PAS)

[0097] (A) Fill the second reaction vessel with N for 5 min through the A opening 2 , N 2 The flow rate is 40ml / min; (B) trimethyl alane and polysilazane are loaded into the second reaction vessel through the B opening; (C) the rotating speed of the tetrafluoromagnetic rotor is regulated by magnetic stirring equipment to be 700r / min; (D) After stirring and reacting at a temperature of 20°C for 50 min, then stirring and reacting at a temperature of 40°C for 10 h to obtain a liquid ...

Embodiment 3

[0112] Step 1: Preparation of anhydrous toluene

[0113] Toluene C 6 H 6 and calcium hydride CaH 2 It is put into the first reaction vessel through the opening of A, refluxed at a temperature of 110 ° C (measured in real time by a thermometer) to remove trace water in toluene, and then distilled at 112 ° C (measured in real time by a thermometer) to obtain anhydrous. Toluene; 1g of calcium hydride was added to 100ml of toluene;

[0114] Step 2: Preparation of liquid polyaluminosilazane (PAS)

[0115] (A) Fill the second reaction vessel with N for 10min through the A opening 2 , N 2 The flow rate is 30ml / min; (B) the metal aluminum organic matter and polysilazane are loaded into the second reaction vessel through the opening of B; (C) the rotating speed of the tetrafluoromagnetic rotor is adjusted by a magnetic stirring device to be 600r / min; (D) ) After stirring and reacting for 150 min at a temperature of 25 °C, and then stirring and reacting at a temperature of 45 °C f...

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Abstract

The invention discloses a preparation method of SiC-SiAlCN glass ceramics, which comprises the following steps: preparing anhydrous methylbenzene by using methylbenzene and calcium hydride, and mixing the anhydrous methylbenzene and PCS (polycarbosilane) to obtain a PCS methylbenzene solution; preparing PAS (periodicacidschiff) by using metallic aluminium organic matter and polysilazane, and mixing the anhydrous methylbenzene and the PAS to obtain a PAS methylbenzene solution; then treating ceramic precursor polymer alloy prepared by mixing the PCS methylbenzene solution and the PAS methylbenzene solution with different ratio by adopting a post vacuum-solidifying atmosphere high-temperature pyrolytic process to obtain the SiC-SiAlCN glass ceramics which can be stably used at the temperature of 1400-1500 DEG C. SiC crystal particles in the SiC-SiAlCN glass ceramics prepared by the invention are dispersed and distributed in SiAlCN amorphous phases and are obtained from PCS micro-area crystallization in curing materials, and an SiAlCN covalent bond amorphous phase is obtained after a PAS area is pyrolyzed.

Description

technical field [0001] The present invention relates to a method for producing glass-ceramic, in particular to a method for producing non-oxide glass-ceramic by using high-temperature pyrolysis ceramic precursor polymer alloy. Background technique [0002] The glass-ceramic material is a complex-phase material in which microcrystals formed by precipitation of crystals in a single uniform glass phase are dispersed in a continuous and dense glass phase. Because glass-ceramic is composed of crystals and amorphous or amorphous bodies. , and has a special multi-dimensional composite structure with uniformly dispersed crystals, so the material has many excellent properties that are different from polycrystalline ceramics and glass, and become a unique new type of material. Due to its excellent performance and strong designability of its characteristics, glass-ceramic has been widely used in fields such as daily life, architectural decoration, optics, electronic devices, biological...

Claims

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Application Information

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IPC IPC(8): C03C10/02
Inventor 张跃李松于涛
Owner BEIHANG UNIV
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