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

Barium titanate-based PTC thermal sensitive ceramic powder and preparation method and application thereof

A heat-sensitive ceramic and barium titanate-based technology, which is applied to subcutaneous injection devices and other directions, can solve the problems of large particle size of barium titanate-based PTC thermistor ceramic powder, uneven mixing of components, and high sintering temperature. Improved safety and temperature stability, narrow grain size distribution, and high sintering activity

Inactive Publication Date: 2012-10-31
NORTHWEST UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide a sol-gel method for the disadvantages of barium titanate-based PTC thermistor ceramic powder synthesized by the traditional solid-state method, such as large particle size, high sintering temperature, uneven mixing of components, and low yield. One-step synthesis of the above-mentioned barium titanate-based PTC thermistor ceramic powder by glue method, and then the preparation of barium titanate-based PTC nano-ceramics

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
  • Barium titanate-based PTC thermal sensitive ceramic powder and preparation method and application thereof
  • Barium titanate-based PTC thermal sensitive ceramic powder and preparation method and application thereof
  • Barium titanate-based PTC thermal sensitive ceramic powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The chemical composition of the preparation is: Ba 1-x-y-0.12 Pb x Sr y Ca 0.12 TiO 3 0.001YO 3 / 2 0.00015MnO 2 0.15SiO2 2 Ceramic powder, fixed content of Ca, Mn, Y, Ti, Si, x and y are 0, 0.13 (1 # sample); 0, 0.08 (2 # sample); 0, 0.03 (3 # samples); 0.03, 0(4 # sample); 0.08, 0(5 # sample); 0.13, 0(6 # Sample).

[0032] The following assumes that x is 0 and y is 0.13 (1 # sample) as an example, using the sol-gel method to synthesize barium titanate-based PTC ceramic nanopowder, the specific steps are as follows:

[0033] (1) Weigh 69.2234 g of tetrabutyl titanate according to the stoichiometric ratio, add 60 ml of glacial acetic acid and 20 mL of ethanol solution of 0.1499 mol / L ethyl silicate, and stir thoroughly;

[0034] (2) Weigh 5.5024g of strontium nitrate and 38.3607g of barium acetate according to the stoichiometric ratio, add 24mL of 1.001mol / L calcium acetate solution, 2.4mL of 0.01305mol / L manganese nitrate solution, 4mL of 0.0500mol / L yttriu...

Embodiment 2

[0042] According to the method described in Example 1, a ceramic powder with the following composition was prepared:

[0043] Ba 0.64 Pb 0.12 Sr 0.12 Ca 0.12 TiO 3 0.005YO 3 / 2 0.00035MnO 2 0.15SiO2 2

[0044] Ba 0.57 Pb 0.18 Sr 0.10 Ca 0.15 TiO 3 0.006YO 3 / 2 0.00025MnO 2 0.13SiO 2

Embodiment 3

[0045] Embodiment 3 Utilize the PTC thermistor prepared in Embodiment 1 as the infusion thermostat designed for the heating plate

[0046] image 3 It is a schematic diagram of the infusion thermostat. In the figure, it includes (1) thermostat substrate, (2) infusion tube, (3) insulation material coated on the substrate, (4) DC regulated power supply, (5) low Curie temperature heating sheet, (6) High Curie temperature heating element.

[0047] Using the resistance-temperature characteristics of barium titanate-based PTC ceramics, that is, the resistivity is low below the Curie temperature, and the resistivity rises sharply near the Curie temperature, the high Curie temperature (such as 180 ° C) and the low Curie temperature (such as 80°C) the heating plates are connected in parallel, the heating plate with higher Curie temperature is in front, and the heating plate with low Curie temperature is behind. When heating, the infusion tube first flows through the heating plate wi...

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

No PUM Login to View More

Abstract

The invention discloses barium titanate-based PTC thermal sensitive ceramic powder and a preparation method thereof. The barium titanate-based PTC thermal sensitive ceramic powder is implemented by the following process that: a general formula of the barium titanate-based PTC thermal sensitive ceramic powder is expressed as Ba1-x-y-zPbxSryCazTiO3 + aYO3 / 2 + bMnO2 + cSiO2, wherein x is 0 to 0.20, y is 0 to 0.20, z is 0.10 to 0.20, a is 0 to 0.01, b is 0.00010 to 0.00050, and c is 0.10 to 0.2. A PTC ceramic heating chip made of ceramic prepared by using a sol-gel one-step method with uniform composition, controllable Curie temperature and low room temperature resistivity has high yield, can adopt 10V direct current as a heating power supply, and is safe and reliable.

Description

technical field [0001] The invention relates to a barium titanate-based PTC heat-sensitive ceramic powder and a preparation method thereof, in particular to a barium titanate-based positive temperature coefficient (Positive Temperature Coefficient, PTC) heat-sensitive powder prepared by a sol-gel method in one step and ceramics thereof method of preparation. Background technique [0002] Barium titanate-based PTC thermistor ceramics have been widely used in various industrial and civil protection circuits and heating elements due to their relatively low cost, high mechanical strength, excellent anti-aging performance and significant PTC effect. application. In recent years, low-voltage DC heating devices have been widely used in daily life due to their high safety, wide application range, low cost, and portability. Such as the USB heating cup provided by CN200820162925.6, the portable AC / DC electric heating toilet seat provided by CN99219137.8, the electric shoe liner prov...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/626A61M5/44
Inventor 畅柱国张昊崔斌
Owner NORTHWEST 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