CN102040374A

CN102040374A - Lithium-magnesium ceramic fired at low temperature and manufacturing method thereof

Info

Publication number: CN102040374A
Application number: CN2009101127403A
Authority: CN
Inventors: 池至铣
Original assignee: QUANZHOU KUNDA GIFT CO Ltd
Current assignee: QUANZHOU KUNDA GIFT CO Ltd
Priority date: 2009-10-19
Filing date: 2009-10-19
Publication date: 2011-05-04

Abstract

The invention provides lithium-magnesium ceramic fired at low temperature and a manufacturing method thereof. A lithium-magnesium ceramic blank comprises 15-25wt% of lithium material, 60-70wt% of magnesium material and 10-20wt% of clay and is required to comprise the following chemical components in percentage by weight: 55-65% of SiO2, 1-5% of Al2O3, 15-25% of MgO, 1-4% of CaO, less than 1% of Na2O, less than 1.5% of K2O, 4-6% of Li2O4 and not more than 0.3% of Fe2O3, wherein ignition loss is 5-7%. Compared with the prior art, in the invention, the lithium material is used as a main fluxing agent capable of greatly reducing firing temperature, thereby reducing fuel cost and improving market competitiveness of products; the magnesium material is a main skeleton-forming constituent capable of preventing firing deformation; and the clay is used as main bonding constituent so as to ensure that a plasticity index meets a forming requirement.

Description

A kind of lithium magnesium porcelain and manufacture method thereof of low-firing

Technical field

The present invention relates to ceramic manufacturing field, be meant a kind of lithium magnesium porcelain and manufacture method thereof of low-firing especially.

Background technology

Porcelain is main blank raw material with kaolin, quartz, feldspar, clay etc. mainly at present, and firing temperature is many more than 1250 ℃, and the porcelain body principal crystalline phase is mullite, quartz; The porcelain body glassy phase is mainly the potassium sodium silicate.Because firing temperature is higher, cause fuel cost to increase greatly, fuel cost is occupied very big ratio in the porcelain production cost, because the price continuous rise of oil, electricity, combustion gas and coal in recent years, development to ceramic industry has produced great influence, a lot of ceramic enterprises cause product price to raise up because energy consumption cost is high, so that have reduced the market competitiveness; Also have some ceramic enterprises to be on the verge of bankruptcy because bearing higher energy consumption cost.

Summary of the invention

Main purpose of the present invention is to overcome the higher shortcoming of porcelain firing temperature in the prior art, and a kind of lithium magnesium porcelain and manufacture method thereof of low-firing is provided, and can significantly reduce the firing temperature of porcelain.

The present invention adopts following technical scheme:

A kind of lithium magnesium porcelain of low-firing, wherein:

Its blank is filled a prescription as follows by weight percentage: lithium material 15～25%, magnesian 60～70%, clay 10～20%, wherein the lithium material is at least a in lithium feldspar, lithionite and the triphane, magnesian is at least a in talcum, serpentine and the magnesite, requires that wherein each following chemical components in percentage by weight is as follows: SiO ₂55～65%; Al ₂O ₃1～5%; MgO 15～25%; CaO 1～4%; Na ₂O＜1%; K ₂O＜1.5%; Li ₂O 4～6%; Fe ₂O ₃≤ 0.3%; Igloss amount 5-7%;

Its glaze is filled a prescription as follows by weight percentage: boracic does not have lead frit 60～70%, talcum 6～10%, lithium feldspar 8～15%, zinc oxide 3～6%, lime carbonate 5～8% and kaolin 5～8% and is mixed with glaze, and wherein each following chemical components in percentage by weight is as follows: SiO in requirement ₂48～62%; Al ₂O ₃5～10%; CaO 3～8%; MgO 2～5%; K ₂O 3～5%; Na ₂O 4～10%; Li ₂O 1～4%; ZnO 2～6%; B ₂O ₃2～8%.

The production of blank: each raw material in the blank is levigate in ball mill respectively, required 250 mesh sieve surpluses less than 0.2%; With the various raw materials of levigated, mix in stock tank by the prescription weighing, and stir homogenizing; With mix, the blank slurry of homogenizing, through high deironing device deironing, to iron-holder less than 0.3%; With the blank slurry that deironing is finished, make mud cake through the pressure filter dehydration, make its water content between 22-25wt%; Behind old 10～15 days of the mud cake, vacuum pugging is made the mud bar; The mud bar is made base substrate.

Burn till: unglazed base substrate is packed in the kiln, through 850～900 ℃ of biscuitings; Biscuit carries out pick, colored drawing, glazing; The base substrate that glazing is finished is packed in the kiln, burns till through 1120～1150 ℃.

The porcelain body principal crystalline phase of the porcelain of manufacturing of the present invention is forsterite, clinoenstatite, quartz, and the porcelain body glassy phase is mainly lithium magnesium silicate.

The lithium magnesium porcelain and the manufacture method thereof of a kind of low-firing of the present invention, except the foregoing invention content, other moulding process, decoration technology are identical with existing conventional ceramic production technique, do not repeat them here.

By the above-mentioned description of this invention as can be known, compare with prior art, the present invention has following beneficial effect:

The present invention is a main fluxing with the lithium material, can reduce firing temperature significantly, thereby reduces fuel cost, prolongs furnace service life, improves the competitiveness of product in market; With magnesian is that main skeleton forms component, can prevent firing deformation; With clay is main bonding component, guarantees that plasticity index reaches the moulding requirement; Glaze adopts fritted glaze and raw glaze to combine, and has good fluidity between 1120 ℃ to 1150 ℃ temperature, guarantees that the base glaze is combined, and does not produce defective, glaze glossiness height such as splitting glaze, stripping glaze;

In addition, firing range broad of the present invention has changed the narrower shortcoming of general soft-paste firing range, is convenient to large-scale production, improves product percent of pass.

Embodiment

Embodiment one

The lithium magnesium porcelain of a kind of low-firing of the present invention, its manufacture method is as follows:

Step 1, the preparation of blank: lithium feldspar 12%, triphane 8%, talcum 50%, serpentine 10%, magnesite 5% and high white clay 15% are mixed with blank, and each following chemical components in percentage by weight is as follows in the blank: SiO ₂62.35%; Al ₂O ₃4.12%; MgO 19.64%; CaO 2.26%; Na ₂O 0.36%; K ₂O 0.92%; Li ₂O 4.31%; Fe ₂O ₃0.09%; Igloss amount 5.95%;

Step 2: the preparation of glaze: boracic is not had lead frit 64%, talcum 7%, lithium feldspar 12%, zinc oxide 5%, light calcium carbonate 6% and kaolin 6% be mixed with glaze, each following chemical components in percentage by weight is as follows in the glaze: SiO ₂55.97%; Al ₂O ₃9.14%; CaO 6.32%; MgO 3.37%; K ₂O 4.08%; Na ₂O 7.83%; Li ₂O2.16%; ZnO 4.79%; B ₂O ₃6.34%;

Step 3, the production of blank: each raw material in the step 1 is levigate in ball mill respectively, required 250 mesh sieve surpluses less than 0.2%; With the various raw materials of levigated, mix in stock tank by the prescription weighing, and stir homogenizing; With the blank slurry of mixing, homogenizing, through high deironing device deironing; With the blank slurry that deironing is finished, make mud cake through the pressure filter dehydration, make its water content between 22-25wt%; Behind old 10～15 days of the mud cake, vacuum pugging is made the mud bar; The mud bar is made base substrate;

Step 4 is burnt till: unglazed base substrate is packed in the kiln, through 850～900 ℃ of biscuitings; Biscuit carries out pick, colored drawing, glazing; The base substrate that glazing is finished is packed in the kiln, burns till through 1120～1150 ℃.

Embodiment two

Step 1, the preparation of blank: lithium feldspar 10%, triphane 8%, lithionite 3%, talcum 48%, serpentine 8%, magnesite 6% and high white clay 17% are mixed with blank;

Step 2: the preparation of glaze: boracic is not had lead frit 66%, talcum 8%, lithium feldspar 10%, zinc oxide 4%, light calcium carbonate 7% and kaolin 5% be mixed with glaze;

Above-mentioned only is two embodiments of the present invention, but design concept of the present invention is not limited thereto, and allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.

Claims

1. the lithium magnesium porcelain of a low-firing, it is characterized in that: the weight percentage of each composition is as follows in the blank of this lithium magnesium porcelain:

SiO ₂?55～65％；

Al ₂O ₃?1～5％；

MgO?15～25％；

CaO?1～4％；

Na ₂O＜1％；

K ₂O＜1.5％；

Li ₂O?4～6％；

Fe ₂O ₃≤0.3％；

Igloss amount 5-7%.

2. the lithium magnesium porcelain of a kind of low-firing as claimed in claim 1, it is characterized in that: the weight percentage of each composition is as follows in the glaze of this lithium magnesium porcelain:

SiO ₂48～62％；

Al ₂O ₃5～10％；

CaO?3～8％；

MgO?2～5％；

K ₂O?3～5％；

Na ₂O?4～10％；

Li ₂O?1～4％；

ZnO?2～6％；

B ₂O ₃2～8％。

3. the lithium magnesium porcelain of a kind of low-firing as claimed in claim 1 or 2, it is characterized in that: described blank is filled a prescription as follows by weight percentage: lithium material 15～25%, magnesian 60～70%, clay 10～20%.

4. the lithium magnesium porcelain of a kind of low-firing as claimed in claim 3 is characterized in that: described lithium material is at least a in lithium feldspar, lithionite and the triphane; Described magnesian is at least a in talcum, serpentine and the magnesite.

5. the lithium magnesium porcelain of a kind of low-firing as claimed in claim 2, it is characterized in that: described glaze is filled a prescription as follows by weight percentage: boracic does not have lead frit 60～70%, talcum 6～10%, lithium feldspar 8～15%, zinc oxide 3～6%, lime carbonate 5～8%, kaolin 5～8%.

6. the manufacture method of the lithium magnesium porcelain of a low-firing is characterized in that comprising the steps:

Step 1, the preparation of blank: lithium material 15～25wt%, magnesian 60～70wt% and clay 10～20wt% are mixed with blank, and wherein each following chemical components in percentage by weight is as follows: SiO in requirement ₂55～65%; Al ₂O ₃1～5%; MgO 15～25%; CaO 1～4%; Na ₂O＜1%; K ₂O＜1.5%; Li ₂O 4～6%; Fe ₂O ₃≤ 0.3%; Igloss amount 5-7%;

Step 2, the preparation of glaze: boracic is not had lead frit 60～70%, talcum 6～10%, lithium feldspar 8～15%, zinc oxide 3～6%, lime carbonate 5～8% and kaolin 5～8% be mixed with glaze, wherein each following chemical components in percentage by weight is as follows: SiO in requirement ₂48～62%; Al ₂O ₃5～10%; CaO 3～8%; MgO 2～5%; K ₂O 3～5%; Na ₂O 4～10%; Li ₂O 1～4%; ZnO 2～6%; B ₂O ₃2～8%;

Step 3, the production of blank: each raw material in the step 1 is levigate in ball mill respectively, required 250 mesh sieve surpluses less than 0.2%; With the various raw materials of levigated, mix in stock tank by the prescription weighing, and stir homogenizing; With mix, the blank slurry of homogenizing, through high deironing device deironing, to iron-holder less than 0.3%; With the blank slurry that deironing is finished, make mud cake through the pressure filter dehydration, make its water content between 22-25wt%; Behind old 10～15 days of the mud cake, vacuum pugging is made the mud bar; The mud bar is made base substrate;

7. the manufacture method of the lithium magnesium porcelain of a kind of low-firing as claimed in claim 6 is characterized in that: described lithium material material is at least a in lithium feldspar, lithionite and the triphane; Described magnesian is at least a in talcum, serpentine and the magnesite.