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

Nickel-zirconia cermet and its application

A cermet and zirconia technology, which is applied in the field of ceramic materials, can solve the problems of increasing the difficulty of making ceramic heating elements and weak conductivity.

Active Publication Date: 2022-02-22
HUBEI CHINA TOBACCO IND
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the ceramic materials used in the above ceramic heating elements have weak electrical conductivity, so additional conductive components need to be arranged on the ceramic heating elements, which increases the difficulty of making the ceramic heating elements.

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
  • Nickel-zirconia cermet and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of the silicon carbide ceramic material for electric heating of the present embodiment comprises the following steps:

[0034] The raw material ratio of the green body is 90wt% of zirconia and 10wt% of nickel-copper powder, wherein the content of nickel in the nickel-copper powder is 90wt%, and the content of copper is 10wt%.

[0035] Mixing of raw materials: first pour nickel powder and copper powder into a ball mill tank and use a ball mill (with absolute ethanol as the ball milling medium) to wet mix the materials for 4 hours. When mixing, the mass ratio of raw materials, balls and ethanol is 1:2:3. The mixed raw materials were placed in an oven at 80°C for 24 hours and then used for later use; then the zirconia powder and 50wt% mixed nickel-copper powder were poured into a mortar and mixed evenly for 30 minutes.

[0036] Granulation stale: Add PVA aqueous solution with a mass percentage concentration of 5% (accounting for 10wt% of the total ma...

Embodiment 2

[0041] The preparation method of the silicon carbide ceramic material for electric heating of the present embodiment comprises the following steps:

[0042] Raw material ratio: the percentage by weight of each raw material is: zirconia 50wt%, nickel-iron powder 50wt%, wherein the content of nickel in the nickel-iron powder accounts for 95wt%, and the content of iron accounts for 5wt%.

[0043] Mixing of raw materials: first pour nickel powder and iron powder into a ball mill tank and use a ball mill (using absolute ethanol as the ball milling medium) to wet mix for 4 hours. The mass ratio of raw materials, balls and ethanol is 1:2:3 when mixing. The mixed raw materials were dried in an oven at 80°C for 24 hours before use; then the zirconia powder and the mixed nickel-iron powder were poured into a mortar and mixed evenly for 30 minutes.

[0044] Granulation aging: Add 5% by mass PVA aqueous solution (plus 10wt%) to the mixture as a molding binder, mix the material and granula...

Embodiment 3

[0049] The preparation method of the silicon carbide ceramic material for electric heating of the present embodiment comprises the following steps:

[0050] Raw material ratio: the percentage by weight of each raw material is: zirconia 70wt%, nickel-vanadium powder 30wt%, wherein the content of nickel in the nickel-vanadium powder accounts for 95wt%, and the content of vanadium accounts for 5wt%.

[0051] Mixing of raw materials: First, pour nickel powder and vanadium powder into a ball mill tank and use a ball mill (using absolute ethanol as the ball milling medium) to wet mix the materials for 4 hours. When mixing, the mass ratio of raw materials, balls and ethanol is 1:2:3. The mixed raw materials were dried in an oven at 80°C for 24 hours and then used for later use; then the zirconia powder and nickel-vanadium powder were poured into a mortar and mixed evenly for 30 minutes.

[0052] Granulation aging: Add 5% by mass PVA aqueous solution (plus 10wt%) to the mixture as a m...

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 present application discloses nickel-zirconia cermets and applications thereof. The nickel-zirconia cermet is produced by a method comprising the following steps: (A) providing a green body, the raw material of which includes 50-90wt% zirconia, 10-50wt% nickel-doped phase metal powder, Wherein the content of nickel in the nickel-doped phase metal powder is at least 90wt%, and the content of the doped phase metal is at most 10wt%, and the doped phase metal is selected from one or at least two of vanadium, aluminum, iron, copper ; (B) sintering the green body. Adding certain doping phase metals, such as vanadium, aluminum, iron, and copper, can effectively reduce the surface tension and liquid-solid interfacial energy between the nickel phase and the zirconia phase, thereby reducing the wetting angle and improving its wettability. It can break the interface between the nickel phase and the zirconia phase, so that the metal nickel phase and the zirconia phase are integrated, which improves the uniformity of nickel distribution in the ceramic material, thereby improving the overall conductivity of the ceramic.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to nickel-zirconia cermets and applications thereof. Background technique [0002] Electric heaters are an important part of new tobacco products. From traditional metal materials (metal alloy heating wire) to non-metal materials (PTC thermosensitive ceramics) and finally to metal-ceramic composite materials (MCH cermet heating elements), the development of electric heating materials inherits the advantages of the previous generation and abandons its shortcomings. , but there are still some deficiencies. For example, metal alloy wire, a traditional electric heating material, is easy to oxidize and has poor heating effect; PTC thermosensitive ceramics are difficult to sinter due to doping due to weak conductivity and low Curie temperature; the best choice of MCH substrate material and overcoming the difficulties of co-firing metal and ceramics . [0003] Chinese inventio...

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): C22C29/12C22C1/05C22C1/10B22F3/10H05B3/14
CPCC22C29/12C22C29/005C22C1/051B22F3/1007B22F3/1017H05B3/141
Inventor 刘华臣吴聪唐良颖黄婷蒋慧昀
Owner HUBEI CHINA TOBACCO IND