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

Sintered zinc oxide tablet and process for producing same

A manufacturing method and technology of sintered bodies, applied in the direction of oxide conductors, zinc oxide/zinc hydroxide, non-metallic conductors, etc., can solve the problem of insufficient suppression, and achieve the effect of improving production efficiency and suppressing spattering

Active Publication Date: 2013-01-30
SUMITOMO METAL MINING CO LTD
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reality is that the suppression of spattering in these technologies is not yet sufficient.

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
  • Sintered zinc oxide tablet and process for producing same
  • Sintered zinc oxide tablet and process for producing same
  • Sintered zinc oxide tablet and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0090] First, as a raw material powder, a predetermined amount of zinc oxide powder having a particle diameter of 1 μm or less is weighed for use.

[0091] 60% by mass of the raw material powder was fractionated, the powder was prepared with pure water and polycarboxylate ammonium salt as a dispersant so that the powder concentration would be 60% by mass, and a slurry was prepared in a mixing container. Then, a granulated powder was obtained based on a first-stage granulation process of spraying and drying the slurry using a spray drying apparatus (ODL-20 type, manufactured by Okawara Chemical Equipment Co., Ltd.). When the outlet temperature of the device chamber is set to 90°C and the exhaust air volume is 15m 3 / min, a granulated powder having a particle diameter of 300 μm or less was obtained.

[0092] The granulated powder was calcined at 1000° C. for 20 hours in an atmospheric pressure sintering furnace, and pulverized after the calcining to obtain a calcined powder hav...

Embodiment 2）

[0109] In addition to setting the outlet temperature of the chamber at 80°C and the exhaust air volume at 15m in the second-stage granulation process, 3 / min to prepare a granulated powder, the same operation as in Example 1 was carried out to obtain a sintered compact material powder consisting of a granulated powder. Among the secondary particles constituting the sintered compact material powder, the number ratio of ring-shaped secondary particles was 72%. Using the obtained sintered compact material, a zinc oxide sintered compact tablet was produced under the same conditions as in Example 1 in all steps after molding.

[0110] The obtained zinc oxide sintered compact tablets were inspected in the same manner as in Example 1. As a result, the average value of the relative density was 60%, and the average value of the resistivity was 5.7 Ω·cm.

[0111] In addition, when the degree of orientation was determined for the obtained zinc oxide sintered compact tablet in the same m...

Embodiment 3）

[0115] In addition to setting the outlet temperature of the chamber at 90°C and the exhaust air volume at 5m in the second-stage granulation process, 3 / min to produce granulated powder, the same operation as in Example 1 was carried out to obtain a sintered body material powder composed of granulated powder. Among the secondary particles constituting the sintered compact material powder, the number ratio of ring-shaped secondary particles was 68%. Using the obtained sintered compact material, a zinc oxide sintered compact tablet was produced under the same conditions as in Example 1 in all steps after molding.

[0116] In the same manner as in Example 1, the obtained zinc oxide sintered compact tablet was inspected. As a result, the average value of the relative density was 61%, and the average value of the resistivity was 6.2 Ω·cm.

[0117] In addition, when the degree of orientation was determined for the obtained zinc oxide sintered compact tablet in the same manner as i...

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
densityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

A sintered zinc oxide tablet is provided from which a transparent electroconductive film having no pinhole defects is stably obtained by vacuum deposition while inhibiting the occurrence of a splash phenomenon. A granulated powder in which the proportion of doughnut-shaped secondary particles is 50% or more and which has been obtained from a zinc oxide powder or from a powder of a mixture of zinc oxide and a dopant is compacted, sintered at ordinary pressure and a temperature of 800-1,300 C, and then held in a vacuum of 110-3 Pa or lower at a temperature of 800-1,300 C for a period of 1-10 minutes to thereby conduct reduction treatment. Thus, a sintered zinc oxide tablet having a hexagonal crystal structure is obtained. When examined by X-ray diffractometry using a CuKa line, the uniaxially pressed surface of the tablet has a degree of orientation of 0.48 or more, the degree of orientation being represented by I(103) / (I(103)+I(110)) where I(103) and I(110) respectively are the integrated intensity for the (103) plane and the integrated intensity for the (110) plane.

Description

technical field [0001] The present invention relates to a zinc oxide sintered body tablet used as an evaporation source when a vacuum evaporation method is used to manufacture an oxide transparent conductive film, and a manufacturing method for obtaining the zinc oxide sintered body tablet. Background technique [0002] The oxide transparent conductive film has high conductivity and high transmittance in the visible light region. Therefore, the oxide transparent conductive film is not only used in solar cells, liquid crystal display elements, electrodes of various other light-receiving elements, etc., but also exerts its reflection and absorption characteristics at wavelengths in the near-infrared region as windows for automobiles and buildings. It is used as a heat ray reflective film used in glass, etc., or as a transparent heating element for anti-fogging in various antistatic films and refrigerated showcases. [0003] In the oxide transparent conductive film, zinc oxide...

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): C04B35/453C23C14/24C23C14/34
CPCC04B2235/3239C04B2235/5445C04B2235/3409C04B2235/3206C04B35/62675C04B2235/3293C04B2235/3229C04B2235/3232C04B2235/3217C04B2235/6567C04B2235/5454C04B2235/664C04B2235/77C04B35/62695C04B2235/3224H01B1/08C04B2235/3298C04B2235/52C23C14/086C04B35/62655C04B35/453C04B2235/9653C01G9/02C04B2235/3286C04B2235/3251C04B2235/54C04B2235/787C04B2235/767C04B2235/6562C04B2235/6581C04B2235/3289C04B2235/3258C04B2235/5436C04B2235/3225C04B2235/3256C04B2235/3244B82Y30/00C23C14/24C23C14/34
Inventor 曾我部健太郎
Owner SUMITOMO METAL MINING CO LTD