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

Preparation method of high purity tellurium

A technology of high-purity tellurium and raw materials, applied in the field of preparation of high-purity materials, can solve the problems of poor electrical properties of materials, difficulty in producing high-purity tellurium, etc., and achieve the effect of no pollution to the environment

Active Publication Date: 2014-12-10
广东先导稀贵金属材料有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since even very small amounts (10 -5 level) impurities will also lead to poor electrical properties of materials, and the purity of tellurium is an important factor that directly affects the properties of materials
[0003] At present, the industry generally adopts the method of combining electrolytic refining and vacuum distillation to prepare high-purity tellurium, but it is difficult to obtain high-purity tellurium above 5N by this method

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
  • Preparation method of high purity tellurium
  • Preparation method of high purity tellurium
  • Preparation method of high purity tellurium

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] Firstly, the production equipment of high-purity tellurium according to the present invention will be described.

[0016] The preparation equipment of high-purity tellurium according to the present invention comprises: zone melt tube 1; Quartz boat 2, is placed in zone melt tube 1, and is used for accommodating raw material 3; Sealing member 4, is used for zone melt tube 1 is sealed; the area melting car 5 is used for temperature treatment of the raw material 3 in the quartz boat 2; the vacuum unit 6 is connected to the area melting material pipe 1 to vacuumize the area melting material pipe 1; the gas delivery pipeline 7 is connected to In the melting material pipe 1 of the area, a path is formed to feed reducing gas into the melting material pipe 1 of the area and discharge the gas in the melting material pipe 1 of the area; the tail gas treatment device 8 is connected to the gas delivery pipeline 7 and receives the output of the gas delivery pipeline 7 gas. In one e...

Embodiment 1

[0038] The number of loop operations is 2.

[0039] During the first cycle operation: the tellurium raw material in step one is 3000g of 5N tellurium; the specified purity in step three is 6N, the predetermined pressure is 1000Pa, the required number of times is 2 times, and the specified flow rate is 150ml / min; step five The specified melting zone width in the method is 90mm, and the specified rate is 60mm / h; the specified number of times in step six is ​​12 times; the specified length in step eight is 7cm; the tellurium raw material after the remaining zone melting operation in step eight is 2252g .

[0040] During the second cycle operation: the tellurium raw material in step one is the 2252g tellurium raw material at the end of the first operation; the prescribed purity in step three is 6N, the predetermined pressure is 1000Pa, the required number of times is 2 times, and the prescribed flow rate is 150ml / min; the specified melting zone width in step 5 is 45mm, and the sp...

Embodiment 2

[0043] The number of loop operations is 3.

[0044] During the first cycle operation: the tellurium raw material in step 1 is 2000g of 5N tellurium; the specified purity in step 3 is 6N, the predetermined pressure is 700Pa, the required number of times is 2 times, and the specified flow rate is 300ml / min; step 5 The prescribed melting zone width is 70mm, and the prescribed speed is 50mm / h; the prescribed number of times in step six is ​​12 times; the prescribed length in step eight is 7cm; the tellurium raw material after the remaining zone melting operation in step eight is 1504g .

[0045] During the second cycle operation: the tellurium raw material in step one is the 1504g tellurium raw material at the end of the first operation; the prescribed purity in step three is 6N, the predetermined pressure is 700Pa, the required number of times is 2 times, and the prescribed flow rate is 300ml / min; the specified melting zone width in step 5 is 40mm, and the specified rate is 40mm...

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
densityaaaaaaaaaa
melting pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of high purity tellurium. The method includes: placing a tellurium raw material in a quartz boat; placing the quartz boat loaded with the tellurium raw material into a zone-melting feed pipe horizontally, and sealing the zone-melting feed pipe; introducing a reduction gas; shifting a zone-melting heating pipe to the head of the tellurium raw material in the quartz boat; heating and melting the head of the tellurium raw material in the quartz boat to form a melting zone, and when a specified melting zone width is reached, making the zone-melting heating pipe move at a specified speed so as to complete one zone-melting operation; when one zone-melting operation is completed, returning the zone-melting heating pipe to the head of the tellurium raw material in the quartz boat and repeating the zone-melting operation; after repeated zone-melting operation, stopping the zone-melting heating pipe, and cooling the tellurium raw material subjected to the zone-melting operation; and cutting off the head and tail of the tellurium raw material respectively by a specified length to complete one cyclic operation, taking the tellurium raw material remained after the cutting as the tellurium raw material for next cyclic operation treatment, and repeating the above 8 steps till a predetermined number of cyclic times. Compared with the prior art, the method provided in the invention can obtain tellurium with purity higher than that of the prior art.

Description

technical field [0001] The invention relates to a method for preparing high-purity materials, in particular to a method for preparing high-purity tellurium. Background technique [0002] High-purity tellurium (Te) has three specifications of 5N, 6N, and 7N, and it is a crystal with off-white metallic luster. Hexagonal lattice, density 6.24g / cm 3 , melting point 450°C, boiling point 989°C. Widely used in semiconductor materials, it is the main material for preparing solar cells, infrared detection materials, light-emitting diodes, radiation detectors, etc. Since even very small amounts (10 -5 Level) impurities will also lead to poor electrical properties of materials, and the purity of tellurium is an important factor that directly affects the properties of materials. [0003] At present, high-purity tellurium is generally produced in industry by combining electrolytic refining and vacuum distillation, but it is difficult to produce high-purity tellurium above 5N by this ...

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): C01B19/02C30B13/00
Inventor 胡智向卢金生毛简文崇斌李德官高鹏飞
Owner 广东先导稀贵金属材料有限公司