TWI422542B - A method of making a porous glass substrate using glass powder - Google Patents

Description

Method for producing porous glass substrate from glass powder

The present invention relates to a method for producing a porous glass substrate by using a glass powder, which is obtained by mixing a glass powder with an etchable metal wire, and then etching and removing the metal wire to form a porous glass substrate.

At present, the invention relates to the invention of glass powder ceramics, such as the invention patent application of "Glass and Glass Ceramic Powder Injection Casting" of the Republic of China Publication No. 200800843, although it is disclosed that the glass powder is mixed with a thermoplastic polymer or a wax adhesive, and then molded. And sintering method, but the glass powder content is above 50%, preferably more than 70%, and the adhesive is directly vaporized during sintering, and the glass powder is directly softened, collapsed and melted together, therefore, after sintering The porosity of the glass is extremely low and cannot be homogenized, making it more difficult to control pore size and porosity.

In other words, the prior art cannot produce porous glass.

Accordingly, in view of the fact that the current glass sintering technology cannot produce a porous glass substrate, the present invention mainly provides a method for producing a porous glass substrate using glass powder, comprising the following steps:

a. Mixing: The glass powder is filled in a container, and the plurality of metal wires are poured into the glass powder to form a mixture, and a part of each metal wire is applied to the container.

b. Heating: The mixture is warmed to the melting temperature of the glass powder and the glass powder is melted.

c. Cooling: drop to normal temperature.

d. Etching: The cooled glass is etched to remove the metal wire to form a porous glass substrate.

The above metal wire is selected from one of the following: aluminum, iron or stainless steel.

After the above step a, the mixture is first molded, and then step b is performed.

The above step a is further mixed with a binder whose vaporization temperature is lower than the melting temperature of the glass powder.

The binder of the above step a is a wax.

The invention has the following advantages or effects:

1. A truly porous glass substrate can be produced.

2. The pore size can be controlled; in the sintering process, since the metal wire has not been vaporized, the pores are formed after cooling and then etched. Therefore, the final pore size can be adjusted by adjusting the wire diameter of the metal wire.

3. The porosity can be controlled; for the reason of the above, the porosity can be adjusted by adjusting the ratio of the metal wire to the glass powder.

4. The application surface of the glass can be expanded; the aforementioned porous glass substrate can be applied to a glass art material such as decoration, a container of an aromatic oil or an insect repellent (mosquito) agent.

(1)‧‧‧ glass powder

(2) ‧ ‧ container

(3)‧‧‧Metal wire

(4) ‧‧‧glass

(5) ‧ ‧ pores

The first figure is a block diagram of the process of the present invention.

The second drawing is a schematic flow chart of the present invention.

First, referring to the first figure and the second figure, the embodiment of the invention is a method for manufacturing a porous glass substrate by using glass powder, comprising the following steps:

a. Mixing: the glass powder (1) is filled in a container (2), and the plurality of metal wires (3) are further poured into the glass powder (1) to form a mixture, and each metal wire (3) is made. Partially adhering to the container (2), the mixture is first molded, and further mixed with a binder, the vaporization temperature of the binder is lower than the melting temperature of the glass powder, and the binder may be a wax.

b. Heating: The mixture is warmed to the melting temperature of the glass powder (1), and the glass powder (1) is melted while the binder is vaporized.

c. Cooling: The glass (4) containing the metal wire (3) is lowered to normal temperature.

d. Etching: The cooled glass (4) is etched to remove the metal wire (3) to form a porous (5) glass substrate.

After step a, the mixture may also be shaped into a specific shape, such as a container of rockery or fragrance, and step b is performed.

The method of the invention is fired with glass powder (1) by adding metal wire (3) Forming a glass substrate containing a metal wire (3). At this time, the relative relationship between the metal wire (3) and the glass material is determined, and then the metal wire (3) is removed by etching, and only the glass material is retained to form a porous layer. (5) Glass substrate.

By adjusting the wire diameter of the metal wire (3), the size of the pores (5) can be adjusted, the ratio of the metal wire (3) to the glass powder (1) can be adjusted, the porosity can be adjusted, and even some special shapes can be formed. Shape. The manufactured product of the method of the invention is a porous glass substrate, and since it can absorb liquid liquid and is slowly released, it can absorb aromatic oil, insect repellent (mosquito) agent, etc. in addition to the above-mentioned rockery water supply or liquid fertilizer. It can also be used as another material for glass art because of its good light transmission and its own irregular microstructure.

Claims (5)

A method for producing a porous glass substrate by using glass powder, comprising the following steps: a. Mixing: loading the glass powder into a container, and further folding the plurality of metal wires into the glass powder to form a mixture, and making each metal Part of the wire is attached to the container; b. heating: heating the mixture to the melting temperature of the glass powder, and melting the glass powder; c. cooling: lowering to normal temperature; d. etching: etching the cooled glass The metal wire is removed to form a porous glass substrate. A method of producing a porous glass substrate using glass powder according to the first aspect of the invention, wherein the metal wire is selected from one of the following: iron or stainless steel. The method for producing a porous glass substrate using glass powder according to the first aspect of the invention, wherein after the step a, the mixture is first molded, and then the step b is performed. The method for producing a porous glass substrate using glass powder according to claim 1, wherein the step a is further mixed with a binder having a vaporization temperature lower than a melting temperature of the glass powder. A method for producing a porous glass substrate using glass powder according to the fourth aspect of the invention, wherein the binder of the step a is a wax.