Preparation method of SiC-SiAlCN glass ceramics

A kind of glass-ceramic and a technology for manufacturing method, which are applied in the field of manufacturing non-oxide glass-ceramic prepared by high-temperature pyrolysis of ceramic precursor polymer alloy

Inactive Publication Date: 2011-11-16
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 Put it into the first reaction vessel through the opening of A, reflux at a temperature of 105°C (measured by a thermometer in real time) to remove traces of water in toluene, and then distill at 110°C (measured by a thermometer in real time) to obtain anhydrous Toluene; 5g of calcium hydride was added to 100ml of toluene;

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

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

Embodiment 2

[0094] Step 1: Preparation of anhydrous toluene

[0095] Toluene C 6 h 6 and calcium hydride CaH 2 Put it into the first reaction vessel through the opening of A, reflux at a temperature of 108°C (measured by a thermometer in real time) to remove traces of water in toluene, and then distill at 112°C (measured by a thermometer in real time) to obtain anhydrous Toluene; 10g of calcium hydride was added to 100ml of toluene;

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

[0097] (A) Fill the second reaction vessel with N for 5 min through the opening of A 2 , N 2 The flow rate is 40ml / min; (B) trimethylalumane and polysilazane are loaded into the second reaction vessel through the B opening; (C) the rotating speed of the tetrafluoromagnetic rotor is adjusted to 700r / min by a magnetic stirring device; (D) Stir and react at a temperature of 20°C for 50 minutes, and then stir and react at a temperature of 40°C for 10 hours to obtain liquid polyaluminosilaza...

Embodiment 3

[0112] Step 1: Preparation of anhydrous toluene

[0113] Toluene C 6 h 6 and calcium hydride CaH 2 Put it into the first reaction vessel through the opening of A, reflux at a temperature of 110°C (measured by a thermometer in real time) to remove traces of water in toluene, and then distill at 112°C (measured by a thermometer in real time) to obtain anhydrous Toluene; add 1g of calcium hydride to 100ml of toluene;

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

[0115] (A) Fill the second reaction vessel with N for 10 min through the opening of A 2 , N 2 Flow rate is 30ml / min; (B) metal aluminum organic matter and polysilazane are packed in the second reaction vessel through B opening; (C) the rotating speed of adjusting tetrafluoromagnetic rotor by magnetic stirring equipment is 600r / min; (D ) after stirring and reacting at a temperature of 25°C for 150 minutes, and then stirring and reacting at a temperature of 45°C for 15 hours to obtain liquid pol...

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02
Inventor 张跃李松于涛
Owner BEIHANG UNIV
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