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

Zirconia ceramic and preparation method and application thereof

A zirconia ceramic and zirconia technology are applied in the field of zirconia ceramics and their preparation to achieve the effects of low resistivity, good toughness and low density

Active Publication Date: 2021-09-28
BYD CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing conductive ceramics are difficult to ensure the mechanical properties and appearance of ceramics while maintaining low resistivity.

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
  • Zirconia ceramic and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The present invention also provides a preparation method of zirconia ceramics, the preparation method comprising the following steps:

[0027] S1. Mix zirconia containing yttrium oxide, titanium nitride, niobium carbide, nickel, and niobium pentoxide powder with a dispersant and a binder to form a slurry;

[0028] S2, drying and shaping the slurry, and then sintering in vacuum or inert gas to obtain zirconia ceramics;

[0029] Wherein, based on the total amount of the powder, the content of titanium nitride is 17-30wt%, the content of niobium carbide is 2-15wt%, the content of nickel is 1-7wt%, and the content of niobium pentoxide is 0.1- The content of 4wt% yttria-containing zirconia is 56-80wt%, and the zirconia contains 2-4mol% yttria.

[0030] In the present invention, the powders of yttria-containing zirconia, niobium pentoxide, titanium nitride, niobium carbide and nickel can be provided alone or in combination in the form of high-purity powder. For example, ytt...

Embodiment 1

[0057] Raw materials: 200g of composite powder, which contains niobium pentoxide (Nb 2 o 5 ) 2.5wt%, niobium carbide (NbC) 10wt%, titanium nitride (TiN) 20wt%, nickel (Ni) 3wt%, 64.5wt% zirconia powder containing 3mol% yttria stabilized.

[0058] Add the raw material to the ball mill tank and add water ball mill for 8h, then add 0.02wt% hypromellose and water sand mill for 10h in the sand mill, and finally add the binder of 4wt% powder (the molar ratio is 1: 1 PEG4000 and PVA) were stirred for 0.5h to form a spray slurry with a solid content of 25% by weight;

[0059] Send the slurry into the spray tower for spray drying (inlet air temperature is 250°C, outlet air temperature is 110°C, centrifugal speed is 15 revolutions per second) to form a spherical powder with strong fluidity for dry pressing, and then dry pressing (A press with a tonnage of 200 tons uses an oil pressure of 8MPa);

[0060] The molded powder was sintered in vacuum at 1500°C for 2 hours for pressureless s...

Embodiment 2

[0065] Raw materials: 200g of composite powder, which contains niobium pentoxide (Nb 2 o 5 ) 2.5wt%, niobium carbide (NbC) 12.5wt%, titanium nitride (TiN) 22.5wt%, nickel (Ni) 3wt%, 59.5wt% zirconia powder containing 3mol% yttria stabilized.

[0066] Add the raw material to the ball mill tank and add water ball mill for 8h, then add 0.02wt% hypromellose and water sand mill for 10h in the sand mill, and finally add the binder of 4wt% powder (the molar ratio is 1: 1 PEG4000 and PVA) were stirred for 0.5h to form a spray slurry with a solid content of 30% by weight;

[0067] Send the slurry into the spray tower for spray drying (inlet air temperature is 250°C, outlet air temperature is 110°C, centrifugal speed is 15 revolutions per second) to form a spherical powder with strong fluidity for dry pressing, and then dry pressing (A press with a tonnage of 200 tons uses an oil pressure of 8MPa);

[0068]The molded powder was sintered in vacuum at 1500°C for 2 hours for pressureles...

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
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a zirconia ceramic, the zirconia ceramic comprises Zr, Ti, Y, Ni and Nb in terms of elements, and the phase of the zirconia ceramic comprises tetragonal phase zirconia, titanium nitride, niobium carbide and elemental nickel; the zirconia ceramic comprises the following components in percentage by weight: 38.4 to 57.2 percent of Zr, 9.9 to 31.2 percent of Ti, 1.5 to 4.4 percent of Y, 1.8 to 15.9 percent of Nb and 1 to 7 percent of Ni; the zirconia ceramic comprises the following phases in percentage by weight: 60 to 80 percent of tetragonal phase zirconium oxide, 17 to 30 percent of titanium nitride, 2 to 15 percent of niobium carbide and 1 to 7 percent of elemental nickel. The zirconia ceramic is good in mechanical property, excellent in appearance and very good in conductivity.

Description

technical field [0001] The invention relates to the field of zirconia ceramics, in particular to a zirconia ceramic and its preparation method and application. Background technique [0002] With the continuous advancement of technology, the functional requirements for smart wearable products (such as smart watches, etc.) are getting higher and higher, such as the requirement to be able to detect heart rate and pulse. In order to be able to detect the heart rate, it is necessary to partially install stainless steel parts on the back of the case that is in contact with the skin, but the stainless steel parts will rust due to soaking in sweat. Conductive ceramic materials can improve product texture and convenience, as well as corrosion resistance. However, the existing conductive ceramics are difficult to ensure the mechanical properties and appearance of the ceramics while maintaining low resistivity. Contents of the invention [0003] The purpose of the present invention...

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): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3251C04B2235/3839C04B2235/3886C04B2235/405C04B2235/6567C04B2235/96
Inventor 陈戈林信平唐威
Owner BYD CO LTD