Antibacterial glaze and method for making antibacterial ceramic

Abstract

The application discloses a bacteriostatic glaze and a method for manufacturing bacteriostatic ceramics, and belongs to the technical field of ceramics. The bacteriostatic glaze comprises the following components: potassium feldspar, quartz, limestone, talc, kaolin, bone ash, zinc oxide and agate powder. The bacteriostatic ceramics obtained by the application has a small lead and chromium elution amount, reduces the harm to human bodies, has high gloss of the glaze surface, and has excellent bacteriostatic effect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ceramics, and particularly relates to a bacteriostatic glaze and a method for manufacturing bacteriostatic ceramics. BACKGROUND

[0002] With the continuous development of the ceramic industry, there are more and more new ceramic products on the market every year, and the uses and styles are various. The ceramics are required not only to be beautiful and practical, but also to have high strength and preferably have a bacteriostatic and bactericidal effect, so that they can be safely used when in contact with food and drinking water.

[0003] Common bacteriostatic ceramics all add complex bacteriostatic raw materials, which increase the cost of enterprises, and it is unknown whether the bacteriostatic effect still exists after high-temperature firing.

[0004] Therefore, it is urgent to prepare a ceramic glaze with low production cost, high yield and bacteriostatic effect. SUMMARY

[0005] The application aims to overcome the shortcomings of the prior art and provide a ceramic glaze with low production cost, high yield and bacteriostatic effect.

[0006] The application adopts the following technical scheme:

[0007] The bacteriostatic glaze comprises the following components in parts by mass: 45-50 parts of potassium feldspar, 20-23 parts of quartz, 17-20 parts of limestone, 5-7 parts of talc, 6-11 parts of kaolin, 3-5 parts of bone ash, 4-7 parts of zinc oxide and 65-70 parts of agate powder.

[0008] Further, it further comprises the following components in parts by mass: 8-11 parts of neodymium oxide, 7-9 parts of europium oxide, 6-8 parts of sodium hexametaphosphate and 3-6 parts of bauxite.

[0009] The method for preparing bacteriostatic ceramics from the bacteriostatic glaze comprises the following steps:

[0010] S1, preparing materials:

[0011] All the raw materials are crushed and then mixed according to the mass fraction to obtain the prepared materials;

[0012] S2, preparing glaze slurry

[0013] The prepared materials obtained in S1 are ball milled and sieved to obtain a sieve material, and then water is added to prepare a bacteriostatic glaze slurry;

[0014] S3, firing

[0015] The bacteriostatic glaze slurry obtained in S2 is applied to the ceramic body, and then dried and fired, and the bacteriostatic ceramics are obtained after cooling.

[0016] Further, the firing process in step S3 is as follows: constant temperature at 880-900 DEG C for 3.5-4 h, constant temperature at 1080-1100 DEG C for 3-3.5 h, constant temperature at 1190-1200 DEG C for 1 h 40 min-2 h, constant temperature at 1300-1310 DEG C for 0.5-1 h, constant temperature at 1380-1400 DEG C for 15-20 min, and then natural cooling, to obtain the antibacterial ceramic.

[0017] Further, during the ball milling in step S2, the ball milling is carried out according to the following mass ratio: material: ball: water = 1:1.6-1.8:1, and the dried material is sieved through a 150-200 mesh sieve to obtain the sieved material.

[0018] Further, after the sieving in step S2, the sieved material is soaked in the treatment liquid and continuously stirred for 1-1.5 h, and then is left to stand for 0.5-1 h, and the volume ratio of the prepared material to the treatment liquid is 1:3-4.

[0019] Further, the treatment liquid comprises the following components according to mass fraction: water 50-80 parts, polydimethylsiloxane 10-12 parts, acrylic resin 13-17 parts, terpene resin 10-11 parts, and sodium stearate 6-7 parts.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] Firstly, different from other antibacterial products, in order to reduce the cost of antibacterial raw materials in the antibacterial glaze, the applicant uses agate powder as the main antibacterial raw material, and combines other raw materials to achieve the antibacterial effect.

[0022] Secondly, during the treatment of the raw materials, the technical personnel have developed a treatment liquid, by adding polydimethylsiloxane (defoaming agent) which has a defoaming effect, and adding acrylic resin 13-17 parts (film forming agent) and terpene resin 10-11 parts (good viscosity) which have a film forming effect, and using the surface active agent sodium stearate, the adhesion of the raw materials on the glaze surface is higher, the gaps are reduced, and the 5-stage firing method can more effectively eliminate the bubbles on the glaze surface, prevent the formation of pinholes, and improve the gloss and strength of the glaze surface.

[0023] Thirdly, in order to further improve the performance of the glaze, ammonium hexametaphosphate is added in the antibacterial glaze, which is combined with bauxite, and cooperates with neodymium oxide and europium oxide, to improve the dispersibility of the raw materials during the treatment in the treatment liquid, and to improve the glaze forming strength during the firing, so that the glaze surface is more delicate. DETAILED DESCRIPTION

[0024] The raw materials used in the present application are all commercially available.

[0025] The bone ash used in the following examples is animal bone ash, which can be animal bone ash such as ox femur bone ash, pig bone ash, etc. The following examples all use ox bone ash.

[0026] Example 1

[0027] The bacteriostatic enamel comprises the following components in parts by mass: potassium feldspar 45 parts, quartz 20 parts, limestone 17 parts, talc 5 parts, kaolin 6 parts, bone ash 3 parts, zinc oxide 4 parts, and agate powder 70 parts.

[0028] The method for preparing bacteriostatic ceramic using the bacteriostatic enamel comprises the following steps:

[0029] S1, preparing materials:

[0030] All raw materials are crushed and then mixed according to parts by mass to obtain the prepared materials;

[0031] S2, preparing the enamel slurry

[0032] The prepared materials obtained in S1 are ball milled and sieved to obtain the sieve material, and then water is added to prepare the bacteriostatic enamel slurry;

[0033] In the ball milling process, the materials, balls and water are ball milled at a mass ratio of 1:1.6-1, and then sieved after drying, with a sieve mesh of 150 meshes to obtain the sieve material. The sieve material is soaked in a treatment liquid and continuously stirred for 1-2 h, and then left to stand for 0.5 h. The volume ratio of the prepared materials to the treatment liquid is 1:3;

[0034] The treatment liquid comprises the following components in parts by mass: water 50 parts, polydimethylsiloxane 10 parts, acrylic resin 13 parts, terpene resin 10-11 parts, and sodium stearate 6 parts.

[0035] S3, firing

[0036] The bacteriostatic enamel slurry obtained in S2 is applied to the ceramic body, and then dried at 45°C for 1 h and fired. After cooling, the bacteriostatic ceramic is obtained.

[0037] In the firing process, the specific conditions are as follows: constant temperature at 900°C for 3.5 h, constant temperature at 1100°C for 3 h, constant temperature at 1190°C for 1 h and 40 min, constant temperature at 1300°C for 0.5 h, constant temperature at 1400°C for 15 min, and then natural cooling to obtain the bacteriostatic ceramic.

[0038] Example 2

[0039] The bacteriostatic enamel comprises the following components in parts by mass: potassium feldspar 50 parts, quartz 23 parts, limestone 20 parts, talc 7 parts, kaolin 11 parts, bone ash 5 parts, zinc oxide 7 parts, and agate powder 65 parts.

[0040] The method for preparing bacteriostatic ceramic with bacteriostatic glaze comprises the following steps:

[0041] S1, preparing materials:

[0042] According to the mass fraction, all raw materials are crushed and then mixed to obtain the prepared materials;

[0043] S2, preparing glaze slurry

[0044] The prepared materials obtained in S1 are ball milled and sieved to obtain the sieve materials, and then water is added to prepare the bacteriostatic glaze slurry;

[0045] During ball milling, the materials are ball milled according to the mass ratio of 1:1.8-1, the ball:water, and then sieved after drying, the sieve mesh is 150-200 meshes, the sieve materials are soaked in the treatment liquid and continuously stirred for 1-1.5 h, and then statically placed for 0.5-1 h, the volume ratio of the prepared materials to the treatment liquid is 1:3-4;

[0046] The treatment liquid comprises the following components according to the mass fraction: water 80 parts, polydimethylsiloxane 12 parts, acrylic resin 17 parts, terpene resin 10-11 parts, and sodium stearate 7 parts;

[0047] S3, firing

[0048] The bacteriostatic glaze slurry obtained in S2 is applied to the ceramic body, and then dried at 50°C for 2 h and fired, and the bacteriostatic ceramic is obtained after cooling;

[0049] During the firing process, the specific process is as follows: in an oxidizing atmosphere, 880°C for 4 h, 1080°C for 3.5 h, 1200°C for 2 h, 1310°C for 1 h, and 1380°C for 20 min, and then naturally cooled to obtain the bacteriostatic ceramic.

[0050] Example 3

[0051] The bacteriostatic glaze comprises the following components according to the mass fraction: potassium feldspar 46 parts, quartz 21 parts, limestone 18 parts, talc 6 parts, kaolin 7 parts, bone ash 4 parts, zinc oxide 5 parts, and agate powder 66 parts.

[0052] The method for preparing bacteriostatic ceramic with bacteriostatic glaze comprises the following steps:

[0053] S1, preparing materials:

[0054] According to the mass fraction, all raw materials are crushed and then mixed to obtain the prepared materials;

[0055] S2, preparing glaze slurry

[0056] The prepared materials obtained in S1 are ball milled and sieved to obtain the sieve materials, and then water is added to prepare the bacteriostatic glaze slurry;

[0057] Wherein, during the ball milling, the ball milling is carried out according to the following mass ratio: material: ball: water = 1: 1.7 ~ 1, and after drying, sieving is carried out, the sieve is 150 mesh, the sieve material is obtained, the sieve material is soaked in the treatment liquid agent, and stirring is continuously carried out for 1h, then standing for 0.5h, the volume ratio of the prepared material and the treatment liquid is 1:3;

[0058] The treatment liquid comprises the following components according to mass fraction: water 60 parts, polydimethylsiloxane 11 parts, acrylic resin 14 parts, terpene resin 10 ~ 11 parts, sodium stearate 6 parts;

[0059] S3, firing

[0060] The antibacterial glaze slurry obtained in S2 is applied to the ceramic body, and after drying at 48℃ for 1.5h, firing is carried out, and after cooling, the antibacterial ceramic is obtained;

[0061] Wherein, the firing process is as follows: in an oxidizing atmosphere, 890℃ constant temperature for 3.5h, 1090℃ constant temperature for 3h, 1190℃ constant temperature for 1h50min, 1305℃ constant temperature for 0.5h, 1390℃ constant temperature for 18min, and then natural cooling, to obtain the antibacterial ceramic.

[0062] Example 4

[0063] The antibacterial glaze material comprises the following components according to mass fraction: potassium feldspar 49 parts, quartz 22 parts, limestone 19 parts, talc 6 parts, kaolin 10 parts, bone ash 4 parts, zinc oxide 6 parts, and agate powder 69 parts.

[0064] The method for preparing the antibacterial ceramic with the antibacterial glaze material comprises the following steps:

[0065] S1, preparing material:

[0066] According to mass fraction, all raw materials are crushed and then mixed to obtain the prepared material;

[0067] S2, preparing glaze slurry

[0068] The prepared material obtained in S1 is ball milled and sieved to obtain the sieve material, and then water is added to prepare the antibacterial glaze slurry;

[0069] Wherein, during the ball milling, the ball milling is carried out according to the following mass ratio: material: ball: water = 1: 1.8 ~ 1, and after drying, sieving is carried out, the sieve is 200 mesh, the sieve material is obtained, the sieve material is soaked in the treatment liquid agent, and stirring is continuously carried out for 1.5h, then standing for 1h, the volume ratio of the prepared material and the treatment liquid is 1:4;

[0070] The treatment liquid comprises the following components according to mass fraction: water 70 parts, polydimethylsiloxane 12 parts, acrylic resin 16 parts, terpene resin 10 ~ 11 parts, and sodium stearate 7 parts;

[0071] S3, firing

[0072] The bacteriostatic glaze paste obtained in S2 is applied to the ceramic body, dried at 50°C for 1 h, and then fired, and the bacteriostatic ceramic is obtained after cooling;

[0073] The firing process is as follows: in an oxidizing atmosphere, 900°C for 4 h, 1095°C for 3 h, 1200°C for 1 h 40 min, 1310°C for 0.5 h, and 1380°C for 18 min, and then naturally cooled, to obtain the bacteriostatic ceramic.

[0074] Example 5

[0075] In this embodiment, relative to Example 1, the bacteriostatic glaze further includes the following components by mass fraction: neodymium oxide 8 parts, europium oxide 7 parts, sodium hexametaphosphate 6 parts, and bauxite 3 parts.

[0076] Example 6

[0077] In this embodiment, relative to Example 1, the bacteriostatic glaze further includes the following components by mass fraction: neodymium oxide 11 parts, europium oxide 9 parts, sodium hexametaphosphate 8 parts, and bauxite 6 parts.

[0078] Example 7

[0079] In this embodiment, relative to Example 1, the bacteriostatic glaze further includes the following components by mass fraction: neodymium oxide 9 parts, europium oxide 8 parts, sodium hexametaphosphate 7 parts, and bauxite 5 parts.

[0080] Example 8

[0081] In this embodiment, relative to Example 1, the bacteriostatic glaze further includes the following components by mass fraction: neodymium oxide 10 parts, europium oxide 9 parts, sodium hexametaphosphate 7 parts, and bauxite 4 parts.

[0082] The uniform ceramic obtained by Examples 1-8 of the present application is detected, wherein:

[0083] JC / T 897-2014 is used to detect Staphylococcus aureus and Escherichia coli, and the standard requirements of both are ≥90%.

[0084] The detection results are shown in Table 1 below:

[0085] Table 1 Test results of bacteriostatic ceramic of Examples 1-4

[0086]

[0087]

[0088] Table 2 Test results of bacteriostatic ceramic of Examples 5-8

[0089]

[0090]

[0091] From Table 1, it can be seen that the bacteriostatic ceramic lead chromium dissolution amount obtained by the methods of Examples 1-8 is small, the human body harm is reduced, the glaze gloss is high, and excellent bacteriostatic effect is obtained.

[0092] The above is the preferred embodiment of the present application, it should be pointed out that, for the ordinary skilled in the art, without departing from the principles of the present application, can also make a number of improvements and refinements, these improvements and refinements also regarded as the protection scope of the present application.

Claims

1. Bacteriostatic glaze, characterized in that, The bacteriostatic glaze comprises the following components in terms of mass fraction: 45-50 parts of potassium feldspar, 20-23 parts of quartz, 17-20 parts of limestone, 5-7 parts of talc, 6-11 parts of kaolin, 3-5 parts of bone ash, 4-7 parts of zinc oxide, 65-70 parts of agate powder, 8-11 parts of neodymium oxide, 7-9 parts of europium oxide, 6-8 parts of sodium hexametaphosphate, and 3-6 parts of bauxite; The method for preparing the bacteriostatic ceramic by using the bacteriostatic glaze comprises the following steps: S1, preparing materials: All the raw materials are crushed and then mixed according to the mass fraction, to obtain the prepared materials; S2, preparing glaze slurry The prepared materials obtained in S1 are ball milled and sieved to obtain the sieve materials, and then water is added to prepare the bacteriostatic glaze slurry; During the ball milling, the materials, balls and water are ball milled at a mass ratio of 1:1.6-1.8:1, and then sieved after drying, to obtain the sieve materials, wherein the sieve mesh is 150-200 meshes; After the sieving, the sieve materials are soaked in a treatment liquid and continuously stirred for 1-1.5 h, and then left to stand for 0.5-1 h, wherein the volume ratio of the prepared materials to the treatment liquid is 1:3-4; The treatment liquid comprises the following components in terms of mass fraction: 50-80 parts of water, 10-12 parts of polydimethylsiloxane, 13-17 parts of acrylic resin, 10-11 parts of terpene resin, and 6-7 parts of sodium stearate; S3, firing The bacteriostatic glaze slurry obtained in S2 is applied to the ceramic body, and then dried and fired, wherein the firing process is as follows: in an oxidizing atmosphere, 880-900 ℃ for 3.5-4 h, 1080-1100 ℃ for 3-3.5 h, 1190-1200 ℃ for 1 h 40 min-2 h, 1300-1310 ℃ for 0.5-1 h, and 1380-1400 ℃ for 15-20 min, and then naturally cooled to obtain the bacteriostatic ceramic.

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