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

A kind of pretreatment method of multi-component powder raw material

A multi-component, pretreatment technology, applied in the field of material preparation, can solve the problems of unstable component addition, offset, and volatility, so as to avoid poor product performance, reduce component offset, and lower sintering temperature Effect

Active Publication Date: 2022-06-21
YANGTZE OPTICAL FIBRE & CABLE CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a pretreatment method for multi-component powder raw materials containing sensitive components, the purpose of which is to precisely control the temperature of multi-component powder raw materials, so that The sensitive component in the powder raw material reacts with other powder raw materials to form a more stable compound powder, avoiding the component deviation caused by the volatilization or instability of the sensitive component in the subsequent sintering step, thereby solving the existing volatile , The technical problems of poor performance of the final product or poor consistency between product batches caused by the deviation of the addition of unstable ingredients

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
  • A kind of pretreatment method of multi-component powder raw material
  • A kind of pretreatment method of multi-component powder raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 A kind of 0.2Na 2 O-0.2B 2 O 3 -0.6SiO 2 Multi-component glass powder, raw material is Na 2 CO 3 , B 2 O 3 , SiO 2 .

[0045] where Na 2 CO 3 The melting point is lower than the decomposition temperature. When the glass is melted, it will decompose and generate bubbles. It is a sensitive component. B 2 O 3 Volatile, it is a sensitive component, and it adopts multi-stage insulation.

[0046] The preprocessing steps are as follows:

[0047] Proportionally and accurately weighed as Na 2 CO 3 , B 2 O 3 , SiO 2 Three powders, ball milled until uniform.

[0048] The multi-component powder raw material is heated and raised at a heating rate of 10° C. / min, and kept at 800-850° C. for a holding time of 8 hours.

[0049] The upper limit of the temperature range is determined due to B 2 O 3 The melting point is lower at 450°C, Na 2 CO 3 will eventually decompose, again due to Na 2 CO 3 The melting point is about 850°C. Considering pre-firing t...

Embodiment 2

[0052] a Bi 0.5 Na 0.5 TiO 3 Ceramic powder, raw material is Na 2 CO 3 , Bi 2 O 3 , TiO 2 .

[0053] where Na 2 CO 3 , Bi 2 O 3 for sensitive components.

[0054] The preprocessing steps are as follows:

[0055] Proportionally and accurately weighed as Na 2 CO 3 , Bi 2 O 3 , TiO 2 Three powders, ball milled until uniform.

[0056] The multi-component powder raw material was heated and heated up at a heating rate of 5° C. / min and kept at 750° C. for a holding time of 12 hours.

[0057] Determination of the upper limit of the temperature range, Bi 2 O 3 Melting point 825℃, Na 2 CO 3 Melting point is about 850℃, query Bi 2 O 3 -TiO 2 According to the phase diagram, when the original composition is obtained, the melting point of the system is around 1200°C, the lowest melting point in any proportion is around 820°C, and the melting point of the test component is around 800°C, so the pre-burning temperature is set in the range of 750-800°C. Since there are...

Embodiment 3

[0060] A 0.3SiO 2 -0.2B 2 O 3 -0.2La 2 O 3 -0.3TeO 2 Multi-component glass powder, raw material is SiO 2 , B 2 O 3 , La 2 O 3 , TeO 2 .

[0061] where B 2 O 3 , TeO 2 For volatile sensitive components.

[0062] The preprocessing steps are as follows:

[0063] Accurately weigh in proportion to SiO 2 , B 2 O 3 , La 2 O 3 , TeO 2 Four powders, ball milled to uniformity.

[0064] due to B 2 O 3 Melting point is 450℃, TeO 2 The melting point is 733°C, and two holding temperatures need to be set. The multi-component powder raw material was heated up and kept at a first preset temperature of 420°C, a heating rate of 5°C / min, and a holding time of 12 hours. The determination of the upper limit of the first preset temperature range, combined with B 2 O 3 Compared with other components in the phase diagram, the melting point of the composition point is higher than that of B 2 O 3 Melting point, that is, the upper limit temperature is B 2 O 3 Melting point...

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
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a pretreatment method for multi-component powder raw materials, which comprises the following steps: heating the multi-component powder raw materials containing sensitive components until the sensitive components in the powder raw materials react with other powder raw materials to form More stable compound powders, obtaining multi-component powder raw materials containing more stable compound powders; the sensitive components are volatile or unstable components. The present invention provides a pretreatment method for multi-component powder raw materials containing sensitive components. By means of pre-heating, volatile or unstable sensitive components are converted into more stable powder components, effectively reducing volatile or unstable components. The component shift caused by the reduction of the content of unstable components in the sintering process can avoid the problem of poor performance of the final product or poor consistency between product batches due to component shift.

Description

technical field [0001] The invention belongs to the field of material preparation, and more particularly relates to a method for pretreatment of multi-component powder raw materials containing sensitive components. Background technique [0002] Powder raw material treatment is an important stage in the material preparation process. The preparation of glass, ceramics, crystals and other materials will involve the pretreatment of powder raw materials. Generally, the pretreatment of powder raw materials only includes mixing and drying processes. The powder raw materials are put into a high temperature furnace, and the glass liquid is uniformized by a stirring device, and the ceramics are formed and then sintered in a high temperature furnace. [0003] If the melting point of each composition of the raw material is quite different, or if it contains B 2 O 3 , P 2 O 5 , TeO 2 , Bi 2 O 3 , CaCO 3 Such volatile, unstable and easily decomposed components will volatilize in t...

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): C03C3/089C04B35/475C04B35/622C03C3/068
CPCC03C3/089C04B35/475C04B35/622C03C3/068C04B2235/3201C04B2235/6562C04B2235/6567C04B2235/9661
Inventor 毛召召李志涛周游陈刚杜立华熊良明
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD