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A kind of glass ceramics containing cacu3ti4o12 phase and its preparation method

A technology of glass-ceramics and glass, which is applied in the field of glass-ceramics containing CCTO (CaCu3Ti4O12) phase and its preparation, glass-ceramics and its preparation, to achieve the effects of high glass density, short preparation time and shortened production cycle

Inactive Publication Date: 2018-11-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of glass-ceramics containing CCTO phase by heat treatment after traditional melting and cooling.

Method used

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  • A kind of glass ceramics containing cacu3ti4o12 phase and its preparation method
  • A kind of glass ceramics containing cacu3ti4o12 phase and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Weigh CaO, CuO, and TiO respectively according to the stoichiometric ratio (molar ratio) of CCTO (molar ratio) 1:3:4 2 , the total mass of the three is 30g. Weigh SiO respectively according to the molar ratio of 6.40:1.58:1.63 2 、Al 2 o 3 、K 2 O, the total mass of the three is 70g. Mix these six glass raw materials evenly by dry mixing.

[0025]2) Put the mixed raw materials into an alumina crucible and put it into a silicon-molybdenum rod high-temperature furnace at room temperature. The silicon-molybdenum rod high-temperature furnace is raised from room temperature to 1200°C at a rate of 4-5°C / min, then from 1200°C to 1550°C at a rate of 2-3°C / min, and then at 1550°C Incubate for 2 hours to completely melt the sample. Then pour the molten sample onto a preheated iron plate, wait for it to cool and shape, then transfer it to a muffle furnace at 500 °C for 4 hours and cool to room temperature with the furnace.

[0026] 3) Put the bulk glass in the silicon car...

Embodiment 2

[0029] 1) Weigh CaO, CuO, and TiO respectively according to the stoichiometric ratio (molar ratio) of CCTO (molar ratio) 1:3:4 2 , the total mass of the three is 40g. Weigh SiO respectively according to the molar ratio of 6.40:1.58:1.63 2 、Al 2 o 3 、K 2 O, the total mass of the three is 60g. Mix these six glass raw materials evenly by dry mixing.

[0030] 2) Put the mixed raw materials into an alumina crucible and put it into a silicon-molybdenum rod high-temperature furnace at room temperature. The silicon-molybdenum rod high-temperature furnace is raised from room temperature to 1200°C at a rate of 4-5°C / min, then from 1200°C to 1550°C at a rate of 2-3°C / min, and then at 1550°C Incubate for 2 hours to completely melt the sample. Then pour the molten sample onto a preheated iron plate, wait for it to cool and shape, then transfer it to a muffle furnace at 500 °C for 4 hours and cool to room temperature with the furnace.

[0031] 3) Put the bulk glass in the silicon ca...

Embodiment 3

[0034] 1) Weigh CaO, CuO, and TiO respectively according to the stoichiometric ratio (molar ratio) of CCTO (molar ratio) 1:3:4 2 , the total mass of the three is 50g. Weigh SiO respectively according to the molar ratio of 6.40:1.58:1.63 2 、Al 2 o 3 、K 2 O, the total mass of the three is 50g. Mix these six glass raw materials evenly by dry mixing.

[0035] 2) Put the mixed raw materials into an alumina crucible and put it into a silicon-molybdenum rod high-temperature furnace at room temperature. The silicon-molybdenum rod high-temperature furnace is first raised from room temperature to 1200°C at a rate of 4-5°C / min, then from 1200°C to 1500°C at a rate of 2-3°C / min, and then at 1500°C Incubate for 2 hours to completely melt the sample. Then pour the molten sample onto a preheated iron plate, wait for it to cool and shape, then transfer it to a muffle furnace at 500 °C for 4 hours and cool to room temperature with the furnace.

[0036] 3) Put the bulk glass in the sili...

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Abstract

The invention discloses Glass ceramic with CaCu3Ti4O12 phase and a preparation method thereof; the glass ceramic with CaCu3Ti4O12 phase is prepared from material A and material B, wherein the material A is from CaO, CuO and TiO2 having a molar ratio of 1:3:4, the material B is from SiO2, Al2O3 and K2O having a molar ratio of (6-7):(1.2-1.8):(1.5-1.8). The glass ceramic with CCTO crystal is successfully prepared through traditional melt cooling and bulk crystallization process, new ways to prepare CCTO material are provided, the preparation method is simple to perform, preparation time is short, production cycle is shortened, the prepared glass ceramic can separate out CCTO phase with high dielectric constant, the glass ceramic is high in compactness, and the defect that CCTO ceramic with gas pores is poor in breakdown strength is overcome.

Description

technical field [0001] The invention relates to a glass-ceramic and a preparation method thereof, in particular to a CCTO-containing (CaCu 3 Ti 4 o 12 ) phase glass-ceramics and a preparation method thereof, belonging to the technical field of glass-ceramics. Background technique [0002] With the wide application of electronic information materials, the corresponding electronic information devices are developing in the direction of miniaturization, especially energy storage materials. Under the premise of small volume of energy storage materials, materials with high dielectric constant are required. It is reported in literature (Ramirez A P, Subramanian M A , Gardel M , etal. Giant dielectric constant response in acopper-titanate. Solid State Commun, 2000 , 115 :217) that CaCu 3 Ti 4 o 12 (CCTO) has a high dielectric constant, and researchers are increasingly interested in the study of CCTO ceramics. Currently, for CaCu 3 Ti 4 o 12 There are many researches and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02C03C6/04C03B32/02
CPCC03B32/02C03C1/00C03C10/00
Inventor 张力元刘世权
Owner UNIV OF JINAN