Unlock instant, AI-driven research and patent intelligence for your innovation.

Complex-phase NTC thermal sensitive ceramic and method of manufacturing the same

A heat-sensitive ceramic and multi-phase technology, which is applied in the field of multi-phase NTC heat-sensitive ceramics and its preparation, can solve the problems of increasing the cost of NTC heat-sensitive ceramics, large energy consumption, and high maintenance costs of kilns, achieving excellent heat-sensitive performance, The effect of simple preparation process

Inactive Publication Date: 2009-04-08
GUILIN UNIV OF ELECTRONIC TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for the transition metal oxide system, in order to make it into a semiconductor ceramic, it is generally sintered at a temperature of 1300 ° C or higher, so it has the following disadvantages: large energy consumption, high maintenance cost of the kiln and easy damage
Moreover, transition metal oxides such as Cu, Ni, Co and rare earth oxides in the raw materials of traditional NTC thermosensitive ceramics are low in nature, and the development cost is relatively high, correspondingly increasing the cost of NTC thermosensitive 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
  • Complex-phase NTC thermal sensitive ceramic and method of manufacturing the same
  • Complex-phase NTC thermal sensitive ceramic and method of manufacturing the same
  • Complex-phase NTC thermal sensitive ceramic and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] with SnO 2 with BaCO 3 According to the chemical formula BaSnO 3 Proportioning, wet grinding with anhydrous ethanol as the medium, drying and heat preservation at 1300°C for 2 hours to synthesize BaSnO 3 Ceramic blanks.

[0018] By Bi 2 o 3 with BaCO 3 According to the chemical formula BaBiO 3 Proportioning, wet grinding with anhydrous ethanol as the medium, drying and then heat preservation at 800°C for 8 hours to synthesize BaBiO 3 Ceramic blanks.

[0019] BaSnO 3 、BaBiO 3 Ceramic blank by 100BaSnO 3 -30BaBiO 3 Proportional batching, secondary ball milling and drying, then add 3% PVA solution as a binder, press it into a disc with a diameter of 18mm and a thickness of 1-1.4mm under a pressure of 100MPa, and heat up at a rate of 150℃ / h at 600 ℃ for 2 hours to discharge the binder, then heat at 1200℃ for 5 hours at a heating rate of 300℃ / h, and finally cool to room temperature with the furnace. The ceramic sheet is covered with silver electrodes on both sid...

Embodiment 2

[0022] with SnO 2 with BaCO 3 According to the chemical formula BaSnO 3 Proportioning, wet grinding with anhydrous ethanol as the medium, drying and heat preservation at 1300°C for 2 hours to synthesize BaSnO 3 Ceramic blanks.

[0023] By Bi 2 o 3 with BaCO 3 According to the chemical formula BaBiO 3 Proportioning, wet grinding with anhydrous ethanol as the medium, drying and then heat preservation at 800°C for 8 hours to synthesize BaBiO 3 Ceramic blanks.

[0024] BaSnO 3 、BaBiO 3 Ceramic blank by 100BaSnO 3 -90BaBiO 3 Proportional batching, secondary ball milling and drying, then add 3% PVA solution as a binder, press it into a disc with a diameter of 18mm and a thickness of 1-1.4mm under a pressure of 100MPa, and heat up at a rate of 150℃ / h at 600 ℃ for 2 hours to discharge the binder, then heat at 1100℃ for 2 hours at a heating rate of 300℃ / h, and finally cool to room temperature with the furnace. The ceramic sheet is covered with silver electrodes on both sid...

Embodiment 3

[0027] with SnO 2 with BaCO 3 According to the chemical formula BaSnO 3 Proportioning, wet grinding with anhydrous ethanol as the medium, drying and heat preservation at 1300°C for 2 hours to synthesize BaSnO 3 Ceramic blanks.

[0028] By Bi 2 o 3 with BaCO 3 According to the chemical formula BaBiO 3 Proportioning, wet grinding with anhydrous ethanol as the medium, drying and then holding at 800°C for 2 hours to synthesize BaBiO 3 Ceramic blanks.

[0029] BaSnO 3 、BaBiO 3 Ceramic blank by 100BaSnO 3 -30BaBiO 3 Ratio ingredients, add 5at% (relative to 100BaSnO 3 -30BaBiO 3 Total) of Sb 2 o 3 Secondary ball milling and drying, then add 3% PVA solution as a binder, press it into a disc with a diameter of 18mm and a thickness of 1-1.4mm under a pressure of 100MPa, and keep it at 600°C at a heating rate of 150°C / h for 2 The binder is discharged within 1 hour, and then kept at 1100°C for 2 hours at a heating rate of 300°C / h, and finally cooled to room temperature wit...

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
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a complex phase NTC heat sensitive ceramic material and a method for preparing the same. The method comprises the following steps: using BaCO3, SnO2 and Bi2O3 as main raw materials, synthesizing BaSnO3 and BaBiO3 blanks through solid phase in advance, mixing and ball-milling the BaSnO3 and the BaBiO3 blanks secondarily or secondarily ball-milling the mixed blanks after doping micro Sb2O3 and oxides of rare earth elements into the mixed blanks, adopting an ordinary ceramic preparation process, and sintering the mixed blanks to be formed at a temperature of between 1,100 and 1,300 DEG C. Performance tests show that the B value of the complex phase NTC heat sensitive ceramic can reach more than 5,000K, and the resistivity at room temperature can be reduced to 200 omega.m. The complex phase NTC heat sensitive ceramic material has the advantages of simple preparation process, small material loss, and lower cost, and the obtained products can be used in the aspects of temperature measurement, temperature control, automatic gain adjustment, temperature compensation and the like.

Description

technical field [0001] The invention relates to NTC heat-sensitive ceramics, in particular to a multi-phase NTC heat-sensitive ceramics and a preparation method thereof. Background technique [0002] NTCR (Negative Temperature Coefficient Thermistor) is a negative temperature coefficient thermistor device, and its resistance decreases with the increase of temperature. NTC thermistors are generally made of transition metal oxide semiconductor ceramic materials, and the resistivity decreases exponentially with the increase of temperature, which is an ideal temperature sensor material. There are many kinds of NTC thermosensitive ceramic materials, which can be divided into oxide system and non-oxide system according to the composition, and the structure can be spinel type, perovskite type, fluorite type, rutile type, etc. The main uses of NTC thermal ceramics are temperature compensation, suppression of inrush current, temperature detection and automatic gain adjustment. [0...

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 Applications(China)
IPC IPC(8): C04B35/457C04B35/622
Inventor 刘心宇黄晋袁昌来杨华斌
Owner GUILIN UNIV OF ELECTRONIC TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com