CN115259843A

CN115259843A - Low expansion coefficient's extrusion porcelain pipe

Info

Publication number: CN115259843A
Application number: CN202210691771.4A
Authority: CN
Inventors: 莫卓荣
Original assignee: Sihui Kangrong New Material Co ltd
Current assignee: Sihui Kangrong New Material Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-01

Abstract

The invention discloses an extruded porcelain tube with low expansion coefficient, which is made of the following materials: 35 plus or minus 5 percent of aluminum oxide, 50 plus or minus 5 percent of silicon dioxide, 1 plus or minus 0.1 percent of ferric oxide, 0.5 plus or minus 0.05 percent of calcium oxide, 12.5 plus or minus 1 percent of magnesium oxide, 0.5 plus or minus 0.05 percent of potassium oxide, 0.5 plus or minus 0.05 percent of sodium oxide, 0.4 plus or minus 0.05 percent of titanium oxide, less than or equal to 0.01 plus or minus 0.01 percent of zirconium dioxide ZrO2, less than or equal to 0.05 plus or minus 0.05 percent of barium oxide, 0.1 plus or minus 0.01 percent of phosphorus pentoxide and 0.05 plus or minus 0.01 percent of other materials. This kind of extrusion ceramic tube of low expansion coefficient solves the big problem of difference in temperature, improves radiation electric ceramic stove, and the control by temperature change stable performance, control by temperature change is more accurate.

Description

Low expansion coefficient's extrusion porcelain pipe

Technical Field

The invention relates to the technical field of extruded porcelain tubes, in particular to an extruded porcelain tube with a low expansion coefficient.

Background

The conventional temperature sensing device for the radiant disc electric ceramic furnace is arranged in the center of a heating body and is electrically connected with a control circuit, and the disconnection of the control circuit is adjusted by adjusting the electric shock distance and the temperature change of the control circuit and the expansion size change distance of materials such as 75 aluminum oxide ceramic rods. Therefore, the 75 aluminum oxide is subjected to the size change of the porcelain tube caused by the temperature change of the furnace plate, and the temperature change range of the electric ceramic furnace is further influenced; however, the expansion coefficient of other materials such as 75 alumina ceramic rods is large, so that the temperature control tolerance of the electric ceramic furnace is large, and the temperature control is not accurate.

Disclosure of Invention

The invention aims to provide an extruded porcelain tube with a low expansion coefficient, which is used for solving the problems that other porcelain rods made of materials in the current market are not accurately applied to the temperature control of a furnace plate and have large temperature difference.

In order to achieve the purpose, the invention provides the following technical scheme: an extruded porcelain tube with low expansion coefficient is made of the following materials:

35 plus or minus 5 percent of aluminum oxide, 50 plus or minus 5 percent of silicon dioxide, 1 plus or minus 0.1 percent of ferric oxide, 0.5 plus or minus 0.05 percent of calcium oxide, 12.5 plus or minus 1 percent of magnesium oxide, 0.5 plus or minus 0.05 percent of potassium oxide, 0.5 plus or minus 0.05 percent of sodium oxide, 0.4 plus or minus 0.05 percent of titanium oxide, less than or equal to 0.01 plus or minus 0.01 percent of zirconium dioxide ZrO2, less than or equal to 0.05 plus or minus 0.05 percent of barium oxide, 0.1 plus or minus 0.01 percent of phosphorus pentoxide and 0.05 plus or minus 0.01 percent of other materials.

Further, 0.05 ± 0.01% of other components are as follows:

less than or equal to 0.01 yttrium oxide, less than or equal to 0.01 lithium oxide, less than or equal to 0.01 lead oxide, less than or equal to 0.01 zinc oxide, less than or equal to 0.01 cadmium oxide, less than or equal to 0.01 strontium oxide, less than or equal to 0.01 manganese oxide, less than or equal to 0.01 chromium trioxide, less than or equal to 0.01 nickel oxide, less than or equal to 0.01 cobalt oxide, less than or equal to 0.01 copper oxide, less than or equal to 0.01 rubidium oxide, and less than or equal to 0.05 sulfur trioxide.

Further, the preparation method of the extruded porcelain tube comprises the following steps

S1, performing ball milling and mixing on raw materials according to the proportion in the claims 1 and 2 for 48 hours, wherein the particle size of powder after ball milling is required to be less than 0.7 μm, and the water content of slurry is about 50%;

and S2, performing filter pressing, wherein the water content of the slurry is filtered by a 20T pressure device in a filter pressing mode, the filter pressing time is about 1 hour, and the water content of the slurry is controlled to be 26 +/-1%. Taking out the mud blank, and sealing and storing the mud blank to be pugged;

s3, pugging is carried out, pug with the water content of 26 +/-1% is subjected to 2-3 times of vacuum air exhaust refining by a vacuum pugging machine, so that a mud blank is not easy to break, the viscosity is good, the hardness is 10-12, and the water content is reduced to 25 +/-1%;

s4, sealing the refined pug, standing in the shade, aging for 5-7 days, and confirming that the water content is 25 +/-1% by using;

s5, extruding a ceramic tube, namely extruding 60 ceramic tubes per minute, drying at 110 ℃ in a 3-meter oven line, conveying the ceramic tubes by a motor at a frequency of 50HZ, and straightening a tail-end pressing wheel;

s6, drying and then firing at 1400 +/-20 ℃ to obtain a fired product with the density of 2.5 +/-0.1 g/cm < 3 >, the water content of 2-3%, the breaking strength of 80 +/-10 MPa, the moisture insulation resistance of more than or equal to 100 MOmega and the thermal expansion coefficient of 2.8 +/-0.18X10-6K-1 (20-700 ℃).

Compared with the prior art, the invention has the beneficial effects that:

this kind of extrusion ceramic tube of low expansion coefficient solves the big problem of difference in temperature, improves radiation electric ceramic stove, and the control by temperature change stable performance, control by temperature change are more accurate, and material cost is lower.

Drawings

FIG. 1 is a schematic view showing the structure of an extruded porcelain tube having a low expansion coefficient according to the present invention;

FIG. 2 is a cross-sectional view of an extruded porcelain tube of the present invention having a low coefficient of expansion;

FIG. 3 is a partial view of an extruded porcelain tube of the present invention having a low coefficient of expansion;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the case of the example 1, the following examples are given,

examples

In an embodiment of the present invention, as shown in fig. 1 to 3, an extruded porcelain tube having a low expansion coefficient is made of:

As shown in fig. two, L1=70, the porcelain tube can withstand 48N pressure without cracking.

Before chamfering, in the area shown in the third figure, gaps are allowed to be arranged at the two ends of the porcelain tube.

The material meets the ROHS environmental protection requirement;

coefficient of thermal expansion: 2.8 +/-0.18X10-6/k-1/(20-700 ℃), 1.2 +/-0.3X10-6/k-1/(20-80 ℃).

0.05 + -0.01% of other ingredients as follows:

The preparation method of the extruded porcelain tube comprises

and S2, performing filter pressing, wherein the water content of the slurry is filtered by a 20T pressure device in a filter pressing mode, the filter pressing time is about 1 hour, and the water content of the slurry is controlled to be 26 +/-1%. Taking out mud blank, and storing in a sealed manner for pugging;

s3, pugging, namely pug with the water content of 26 +/-1% is subjected to vacuum air exhaust pugging for 2-3 times by a vacuum pugging machine, so that a mud blank is not easy to break, the viscosity is good, the hardness is 10-12, and the water content is reduced to 25 +/-1%;

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An extruded porcelain tube with low expansion coefficient is characterized in that the material of the extruded porcelain tube is as follows:

2. The extruded porcelain tube of low expansion coefficient according to claim 1, wherein 0.05 ± 0.01% of other components are as follows:

less than or equal to 0.01 yttrium oxide, less than or equal to 0.01 lithium oxide, less than or equal to 0.01 lead monoxide, less than or equal to 0.01 zinc oxide, less than or equal to 0.01 cadmium oxide, less than or equal to 0.01 strontium oxide, less than or equal to 0.01 manganese monoxide, less than or equal to 0.01 chromium trioxide, less than or equal to 0.01 nickel monoxide, less than or equal to 0.01 cobalt monoxide, less than or equal to 0.01 copper oxide, less than or equal to 0.01 rubidium oxide, and less than or equal to 0.05 sulfur trioxide.

3. The extruded porcelain tube with low expansion coefficient as claimed in claims 1 and 2, wherein the extruded porcelain tube is prepared by the method of

and S2, performing filter pressing, wherein the water content of the slurry is filtered by a 20T pressure device in a filter pressing mode, the filter pressing time is about 1 hour, and the water content of the slurry is controlled to be 26 +/-1 percent. Taking out the mud blank, and sealing and storing the mud blank to be pugged;

s5, extruding a ceramic tube, namely extruding 60 drying lines of which the drying temperature is 110 ℃ and the conveying frequency of a motor is 50HZ, and straightening a tail end pressing wheel, wherein the drying temperature is 60 m/min and 3 m of drying line;