Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing strontium-barium titanate/polymide dielectric adjustable composite material thick film

A technology of polyimide dielectric and barium strontium titanate, which is applied in the field of composite material manufacturing, can solve the problems such as the dielectric adjustability of polymer-based barium strontium titanate composite materials, and achieve excellent chemical stability, The effect of reducing the dielectric constant and smoothing the surface without cracks

Inactive Publication Date: 2007-11-14
XI AN JIAOTONG UNIV
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Through document search, have not yet found to have the document and patent similar to the present invention, some documents relevant to the present invention retrieved, mainly improve strontium barium titanate by adding low-loss materials such as magnesium oxide in barium strontium titanate material. Comprehensive dielectric properties of materials to improve their adaptability in device applications, did not find any report on the dielectric tunability of polymer-based barium strontium titanate composites

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing strontium-barium titanate/polymide dielectric adjustable composite material thick film
  • Method for preparing strontium-barium titanate/polymide dielectric adjustable composite material thick film
  • Method for preparing strontium-barium titanate/polymide dielectric adjustable composite material thick film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1. Select ZKPI-305IID ordinary polyimide coating glue produced by Beijing Bomi Technology Co., Ltd. as the polyimide precursor.

[0061] 2. The chemical composition is prepared by conventional solid-state reaction method as Ba 0.6 Sr 0.4 TiO 3 Barium strontium titanate dielectric tunable ceramics. According to XRD detection, barium strontium titanate has a pure cubic perovskite structure without the formation of a second phase.

[0062] 3. Crushing by means of ordinary ball milling, the ball milling speed is 150 rpm, and the ball milling is continued for 4 hours. The central particle size of the prepared barium strontium titanate powder is 0.6um.

[0063] 4. Take 100g of crushed barium strontium titanate powder, dry at 110°C for 24 hours, then add 2-5g of acrylic acid solution, and ultrasonically treat it in 100ml of absolute ethanol for 1 hour, so that the surface of the ceramic powder is treated with acrylic acid.

[0064] 5. Mix 20g of the polyimide precursor and...

Embodiment 2

[0068] 1. Select ZKPI-305IID ordinary polyimide coating glue produced by Beijing Bomi Technology Co., Ltd. as the polyimide precursor.

[0069] 2. The chemical composition is prepared by conventional solid-state reaction method as Ba 0.6 Sr 0.4 TiO 3 Barium strontium titanate dielectric tunable ceramics. According to XRD detection, barium strontium titanate has a pure cubic perovskite structure without the formation of a second phase.

[0070] 3. Crushing by means of ordinary ball milling, the ball milling speed is 150 rpm, and the ball milling is continued for 4 hours. The central particle size of the prepared barium strontium titanate powder is 0.6um.

[0071] 4. Take 100g of crushed barium strontium titanate powder, dry at 110°C for 24 hours, then add 2-5g of acrylic acid solution, and ultrasonically treat it in 100ml of absolute ethanol for 1 hour, so that the surface of the ceramic powder is treated with acrylic acid.

[0072] 5. Mix 20g of the polyimide precursor and...

Embodiment 3

[0076] 1. Select ZKPI-305IID ordinary polyimide coating glue produced by Beijing Bomi Technology Co., Ltd. as the polyimide precursor.

[0077] 2. The chemical composition is prepared by conventional solid-state reaction method as Ba 0.6 Sr 0.4 TiO 3 Barium strontium titanate dielectric tunable ceramics. According to XRD detection, barium strontium titanate has a pure cubic perovskite structure without the formation of a second phase.

[0078] 3. Crushing by high-energy ball milling, ball milling for 4 hours, the central particle size of the prepared barium strontium titanate powder is 0.1um.

[0079] 4. Take 100g of crushed barium strontium titanate powder, dry at 110°C for 24 hours, then add 2-5g of acrylic acid solution, and ultrasonically treat it in 100ml of absolute ethanol for 1 hour, so that the surface of the ceramic powder is treated with acrylic acid.

[0080] 5. Mix 20 g of the polyimide precursor and 20 g of the surface-pretreated barium strontium titanate pow...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Central particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses the preparation methods of a barium strontium titanate / polyimide dielectric with the materials of adjustable thick composite, uses polyimide as a precursor; Selecting the barium strontium titanate powder dielectric ceramics (Ba1-xSrx) TiO3 as dielectric adjustable phase, polyimide precursors and the surface treatment of barium strontium titanate dielectric ceramic powder mixed in proportion, by using a high-energy or ordinary ball milling way to make them adequately scattered and get mixed thick-film paste;Using conventional spin-coating process, dipping - carrying process or extension of thick slurry will be mixed in the pre-treatment of the coating material on the substrate, and then coating on the substrate material after the heat treatment process and follow-up process can be get Barium strontium titanate / polyimide dielectric adjustable thick composite materials. This invention need a low processing temperature (=< 350 degree C), the minimum curing temperature is less than 160 degree C.

Description

technical field [0001] The invention belongs to the technical scope of composite material manufacturing, and in particular relates to a method for preparing a thick film of strontium barium titanate / polyimide dielectric adjustable composite material. Background technique [0002] As phased array radar is widely used in various types of detection and tracking systems, as a key component of phased array radar - phase shifter has become the focus of research. Compared with ferrite and PIN diodes widely used at present, barium strontium titanate (Ba 1-x Sr x TiO 3 , referred to as BST) as a representative of the ferroelectric material phase shifter, because of its low cost, excellent performance and simple process, it has attracted more and more attention, and has become a hot spot in the research of phase shifter materials. Among many candidate materials for ferroelectric phase shifters, barium strontium titanate is known for its high dielectric constant (ε r >2000, 1MHz...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L79/08C08K9/04C09D179/08C08K3/24
Inventor 汪宏向锋张明辉杨海波李可铖姚熹
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com