JP2008196837A - Porous ceramic applied product with moisture permeable glaze - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a porous ceramic having excellent color, gloss and sticking tendency while maintaining moisture absorbing characteristic and moisture release characteristic by applying moisture permeable glaze, although the moisture permeable speed is remarkably lowered on glazing humidity conditioning ceramic. <P>SOLUTION: Pigment, inorganic material, and especially porous raw material is mixed with low-melting point frit to make glaze, and the glaze is applied with a predetermined thickness to the porous surface, and burned to obtain moisture permeable glaze having excellent color, gloss and sticking tendency, whereby a humidity conditioning building material having excellent design and a porous ceramic applied product can be obtained. As the porous ceramic applied products, cited are a humidifier (a humidifying vase), a wine cooler and a jug. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a porous ceramic excellent in color, luster, and adhesion while maintaining water permeability by applying a water-permeable glaze to the porous ceramic, and includes a low melting point frit, a pigment and an inorganic substance, In particular, a porous raw material is blended to form a glaze, and the porous surface is coated to a predetermined thickness and baked to obtain a moisture-permeable glaze with excellent color, gloss, and adhesion, and a porous design with excellent design. Quality ceramic application products can be obtained. Examples of the porous ceramic application product include a humidifier (humidified vase), a wine cooler, and a jug.

Porous ceramic products are, for example, permeable ceramics made from diatomaceous earth as the main raw material, mixed with other ceramic raw materials, mixed, molded and fired, and baked goods classified as pottery. Then, when water permeates from the wall of the product and the water evaporates on the surface, it is humidified or the water in the container is cooled.
Japanese Patent No. 2652593 Japanese Patent No. 3659867 Patent Publication No. 8-144387 Patent No. 3519004

Porous ceramics are used in building materials, filters, heat insulating materials, sound absorbing materials, etc., but applied to humidifiers and coolers using water permeability. Since the humidifier and the cooler are used in daily life, a glaze for coloring is required. Glaze is applied to color ceramics, improve strength, and obtain surface smoothness, but generally forms a glassy film on the surface of the ceramic product by firing and does not have moisture permeability or water permeability. For this reason, the moisture permeability and water permeability of the porous ceramics are lost. In order to improve such drawbacks, humidity control building materials with glazes have been proposed, but since the glazes proposed here have no moisture permeability, they are applied to 90% or less of the product surface, Moisture permeability was obtained from the unglazed part. Therefore, the original moisture permeability and design properties of ceramics cannot be expressed.

The present invention has developed porous ceramics that use the water permeability of porous ceramics to eliminate excess water permeation from the product wall and allow water necessary for evaporation to permeate the glaze itself. In addition, it is possible to apply glazes with excellent glaze color, gloss, and adhesion to the ceramic surface, and to provide porous ceramic application products with excellent design, such as humidifiers and coolers. is there.

According to the present invention, the pore diameter and porosity of the porous ceramics are appropriately controlled, the water permeability from the product wall is made appropriate, and a large amount of water does not drip from the wall surface and from the surface. A porous body that permeates water sufficient to evaporate the water was prepared and used as a humidifier or a cooler. For this reason, as a porous body, a composition that can form porous ceramics into a product, adjust the degree of firing so that water does not penetrate so much that it drops from the surface, and it is sufficient to evaporate water from the surface. The pore diameter and porosity were adjusted to obtain appropriate water permeability. In order to properly express water permeability and bring strength and water resistance as a pottery, the mixing ratio of the base clay and porous material is adjusted appropriately to sinter the pores formed during molding and firing In order to prevent the material from being crushed, the baking conditions are controlled to obtain an appropriate water-permeable porous material. Further, the water-permeable glaze applied to this material contains pigments, clay, bones necessary for coloring. A porous ceramic is provided with a glaze in which an inorganic substance such as a material or a porous material and a frit are blended in a predetermined ratio and the thickness of the glaze is a predetermined thickness. The type of pigment depends on the desired color of the porous ceramic product, for example, zircon gray gray; praseodymium yellow, chrome titanium yellow (above yellow); chrome green, Victoria green (above green); bitumen, turquoise blue (above blue) ); Chrome tin pink, salmon pink (more pink). Most porous ceramics are fired at a temperature of 600 ° C. or higher and 1200 ° C. or lower. Since these pigments do not melt at such temperatures, the frit melts into a glass phase when fired and does not melt into the glass phase. Exist in a distributed form. When the blending amount of the pigment and the inorganic substance increases, the glass phase hardly forms a matrix even when melted with each other, has moisture permeability, and when it further increases, the glaze cannot be fixed. The present invention appropriately controls the water permeability of the porous ceramics, has a humidifying function and a cooling function by applying a water-permeable glaze, and uses energy with excellent design by applying a water-permeable glaze. This makes it possible to create natural evaporative humidifiers and coolers that do not.

The water-permeable porous ceramics application product of the present invention allows energy saving and safe humidifiers and coolers because water penetrates through the walls of the product and evaporates from the surface, so that energy such as electricity and gas is not used. It was. In particular, it is effective in preventing accidents in the homes of elderly people and children. The water-permeable glaze is applied to the porous ceramics, so that the color, gloss, and stickiness of the porous ceramics are not significantly reduced. It is possible to produce products with excellent porous ceramics and contribute to health management at home and at work.

The present invention makes it possible to produce a suitable water-permeable porous ceramic by controlling the microstructure of the porous body, and to enable a humidifier and a cooler utilizing water permeation and evaporation. The water permeability required as a humidifier or a cooler is that water permeates too much so that water does not drip and has sufficient water permeability for evaporation. The evaporation rate of water varies depending on the temperature around the container, the relative humidity, the wind speed, and the temperature of water in the container. The humidifier is used at the time of drying, and in order to evaporate and humidify a considerable amount of water, the corresponding water permeability is required. The evaporation rate of water in the glass cup in the range of 10 ° C. to 70 ° C. was about 0.2 g / cm ² · hour to about 6 g / cm ² · hour. In order to obtain the water permeability necessary for this, the porosity needs to be 10% or more. In order to prevent water from dripping when water is put in the container, the porosity is 55% or less. It was necessary to have a porous body. Larger porosity improves water permeability, but on the other hand, excessive water may penetrate and water may drip from the surface. Preferably, by blending a natural porous material such as diatomaceous earth, allophane, sepiolite, smectite, holmite, opaline silica, pearlite, imogolite, etc. into the substrate, there are many fine pores, water retention is increased, and air permeability is increased. As it increased, it was found that water did not drip. When one or more of these porous raw materials are blended in an amount of 10% or more, in order to maintain moldability, 5% or more of clays, in addition, feldspar or silica sand is used as a base material, and the firing temperature is 800 ° C. To 1200 ° C., a porous ceramic having a porosity of 10% to 55% and maintaining sufficient water permeability was obtained. In addition, by adjusting the blending amount of inorganic substances such as pigment, aggregate, porous material, etc. and adjusting the thickness of the frit, a glaze that is moisture permeable and has excellent color, gloss, and adhesion As a result, it was possible to provide a humidity control ceramic excellent in design without reducing the water permeability of the porous ceramic. The frit to be used needs to be sufficiently melted at the temperature at which the porous ceramic is fired, and it is necessary that the coefficient of thermal expansion and water resistance are excellent. The pigment may be a commercially available inorganic pigment or a simple inorganic substance such as iron oxide, chromium oxide, nickel oxide, zirconia, titania, tin oxide, or zirconite. As the porous raw material, diatomaceous earth, zeolite, allophane, opaline silica, smectite and the like can be used.

The water permeability function of the porous ceramics is governed by the type and blending amount of the porous material and the firing temperature. The water permeation speed varies depending on the water permeability of the glaze applied to the porous ceramic. It is desirable that the permeation rate is not significantly reduced by applying glaze.

Porous ceramics obtained by applying a glaze appropriately adjusted in the blending ratio of pigment, inorganic substance and frit to a predetermined thickness and firing are not significantly different from porous ceramics that are not permeable to water, A porous ceramic with good gloss was obtained. In addition, a humidified vase produced by applying a similar glaze to the surface of a vase molded with porous ceramics, the water in the vase oozes out through the ceramic wall, and is about the same as a humidified vase Evaporated from the surface at an evaporation rate of 1, and showed good humidification characteristics as a moistened vase.

A humidified vase was prepared by casting and molding a base material containing 85% by weight of diatomaceous earth manufactured by Sirix Co., Ltd. and 15% by weight of girome clay manufactured by Marusen Pottery Materials Co., Ltd. On this surface, 45% by weight of a low melting point boric acid frit CY5600M3 (deflection point 545 ° C.) manufactured by Takara Standard Co., Ltd. as a pigment, 20% by weight of reagent grade 1 iron oxide manufactured by Kanto Chemical Co., Inc. and Takara Standard Co., Ltd. as an inorganic substance The company contains 10% by weight of zirconite, 5% by weight of antibacterial agent NOVALON (AG300) manufactured by Toa Gosei Co., Ltd., 20% of diatomaceous earth manufactured by Sirix Co., Ltd. as a porous raw material, and Mitsui Chemicals, Inc. Bind Serum (WA310) ) A glaze (teacup) containing 3% by weight externally was applied to a thickness of about 15 microns. This was heated at 100 ° C./hour, held at 800 ° C. for 1 hour, and then fired on a schedule for cooling. The height was 18 cm, the body diameter was 13.5 cm, the surface area was 631 cm ² , and the porosity was 43%.

When 20 ° water was placed in this vase and left in a room at a room temperature of 16 ° C. to 23 ° C. and a relative humidity of 35% to 47% for 1 day, the water loss was 96 g / day. When 65 ° C. hot water was placed and left for 1 hour, the weight loss was 37 g / hour. Water did not drip from the surface and could be humidified at a sufficiently high evaporation rate.

In the same manner as in Example 1, 75% by weight of Silix Co., Ltd., 20% of silica sand by Mikawa Silica Co., Ltd., and 5% by weight of the antibacterial agent NOVALON (AG300) were blended to form a wine cooler by casting. On the surface, glaze (black camellia) was blended in a mottled pattern with the same composition as the tea bowl as in Example 1 and 20% by weight of pigment black (3700) manufactured by Asahi Kasei Kogyo Co., Ltd. as a pigment. This was heated at 100 ° C./hour, held at 950 ° C. for 1 hour, and then fired on a schedule for cooling. The height was 23 cm, the diameter was 14 cm, and the porosity was 21%. If you put water with a water temperature of 23 ° C and 720ml of wine and leave it for 5 hours, the water temperature inside is about 16 ° C, the wine is 17 ° C, and you can cool the wine without using energy such as electricity. The wine was ready to drink. Furthermore, when several ice blocks were put, the temperature of the wine cooled to 14 ° C., and the wine could be further cooled with a little ice.

Claims (3)

A humidifier characterized in that a porous ceramic is a container for storing water, and water is infiltrated through the ceramic wall and evaporated from the surface to humidify the room. A cooler characterized in that a porous ceramic is a container for storing water, and water permeates through the ceramic wall and evaporates from the surface, thereby cooling the water in the container. The humidifier or cooler according to claim 1 or 2, wherein a water-permeable glaze is applied to the surface of the porous ceramic.