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A ceramic irrigation membrane preparation mold and gradient ceramic irrigation membrane preparation process

A preparation process and ceramic technology, applied in the field of gradient ceramic irrigation membranes, can solve the problem of not being able to ensure the bonding strength of the ceramic membrane support body and the membrane layer at the same time, filtration flux, etc. resistance, the effect of improving the bonding strength

Active Publication Date: 2021-10-15
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention firstly proposes a ceramic irrigation membrane preparation mold, and on this basis, proposes a gradient ceramic irrigation membrane preparation process based on the ceramic irrigation membrane preparation mold, which solves the problem that the current interlayer smearing process cannot guarantee the ceramic membrane at the same time. The bonding strength between the support and the membrane layer and the filtration flux of the membrane

Method used

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  • A ceramic irrigation membrane preparation mold and gradient ceramic irrigation membrane preparation process
  • A ceramic irrigation membrane preparation mold and gradient ceramic irrigation membrane preparation process
  • A ceramic irrigation membrane preparation mold and gradient ceramic irrigation membrane preparation process

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Embodiment 1

[0036] Comply with the above technical solutions, such as Figure 1 to Figure 5 As shown, this embodiment provides a ceramic irrigation membrane preparation mold, which is composed of an outer mold 8 , an inner core 7 and a pressure rod 6 . The outer mold 8 is structural steel, which is a circular cylindrical structure with a bottom on one side. Its overall height h1, base height h2 and inner diameter d1 are determined according to the thickness and diameter of the prepared ceramic body, and its outer diameter d2 and inner diameter d1 The difference is about 10mm-20mm. The outer mold is composed of the first mold body 3 and the second mold body 4. The shape and size of the first mold body 3 and the second mold body 4 are exactly the same. Generally, the overall height h1 can be set to 50mm, and the height of the base h2 can be set to 20mm. Outer slide rails and inner slide rails are designed at the semicircle of the first mold body 3 and the second mold body 4, and the shape...

Embodiment 2

[0038] This embodiment provides a kind of porous SiO2 for irrigation 2 / Si 3 N 4A preparation method for gradient ceramics, comprising the steps of:

[0039] Step 1, first prepare the slurry and precursor powder:

[0040] (1) First, cheap sodium carboxymethyl cellulose, silica sol, talcum powder (800 mesh), deionized water, Si 3 N 4 The powder (600 mesh) was mixed according to the proportion to make a slurry, then an appropriate dispersant was added, the slurry was prepared by ball milling, the resulting slurry was sealed in an Erlenmeyer flask, and the ultrasonic oscillator was used to vibrate and mix at a frequency of 40kHz for 6h After that, place it in the Erlenmeyer flask for subsequent use;

[0041] (2) SiO 2 Powder (325 mesh), Si 3 N 4 Powder (600 mesh), talcum powder (800 mesh), Al 2 o 3 The powder (400 mesh) was mixed according to a certain ratio, and the mixed powder 0 was obtained by ball milling for 24 hours in a vacuum ball mill (rotation speed: 240r / min...

Embodiment 3

[0051] This embodiment provides a kind of porous SiO2 for irrigation 2 / Si 3 N 4 A preparation method for gradient ceramics, comprising the steps of:

[0052] Step 1, first prepare the slurry and precursor powder:

[0053] (1) First, 10g sodium carboxymethyl cellulose, 30g talcum powder (800 mesh), 10g Si 3 N 4 The powder (600 mesh) is mixed according to the proportion to make powder, and the resulting mixture powder is placed in the alumina tank of the ball mill, and 15-25 agate beads with a diameter of 8-12mm are added, and then the rotation speed of the ball mill is adjusted to 240r / min. The revolution speed was 360r / min, and ball milled for 2h to prepare ceramic powder. Add 20mL of deionized water, 20mL of silica sol and 5g of sodium citrate to the obtained ceramic powder, and after mixing, seal the slurry in a Erlenmeyer flask, vibrate and mix for 6 hours at a frequency of 40kHz with an ultrasonic oscillator, and then place it in a conical Reserve in a shaped bottle...

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Abstract

The invention discloses a ceramic irrigation membrane preparation mold and a gradient ceramic irrigation membrane preparation process. The mold includes an outer mold, a pressure rod and an inner core; the outer mold is a hollow columnar structure including a bottom surface, and the pressure rod is placed In the outer mold, holes are reserved in the center of the pressurizing rod and the center of the bottom surface of the outer mold for the vertical insertion of the inner core. The preparation process of the gradient ceramic irrigation membrane comprises the following steps: first preparing slurry and precursor powder; and preparing the gradient ceramic irrigation membrane by adopting a green body solid-state molding process. Adopt preparation mold and preparation technology of the present invention, the porous SiO of preparation 2 / Si 3 N 4 Multiphase Gradient Ceramic Irrigation Membrane: Changes the previous bonding method between the support body and the membrane layer, fundamentally eases the thermal stress between the support body and the membrane layer, and improves the bonding strength between the support body and the membrane layer; at the same time , Improve the interlayer bonding method, the pore difference between the bonding layer and the membrane layer, make the pore gradient present a gradient change along the water flow direction, and increase the filtration flux.

Description

technical field [0001] The invention belongs to the technical field of water-saving agricultural irrigation in arid areas, and in particular relates to a mold and a gradient ceramic irrigation membrane prepared by a green body solid-state molding process. Background technique [0002] Microporous ceramic drip irrigation is a new type of irrigation equipment. Compared with traditional equipment, it has the advantages of easy cleaning and anti-clogging. The core of the ceramic drip irrigation device is the microporous ceramic, which is uniformly distributed on the pore scale. Uniformly distributed pores are easy to achieve in industry, but if you want to achieve better filtering effect, you generally need to make the ceramic pores smaller. However, although smaller pores improve filtration efficiency, they reduce outflow and reduce irrigation efficiency. [0003] At present, one idea to solve the above problems is to replace the microporous ceramics in the drip irrigation em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B7/00B28B7/28C04B35/14C04B35/622C04B35/636A01G25/06
CPCA01G25/06B28B7/00B28B7/28C04B35/14C04B35/62218C04B35/636C04B2235/3217C04B2235/349C04B2235/3873
Inventor 吴普特周伟张林蔡耀辉赵笑任乃望刘莹韩梦雪姚春萍付博阳黄煜宁莎莎杜一超
Owner NORTHWEST A & F UNIV
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