Artificial jade and manufacturing method thereof

Abstract

The invention provides artificial jade and a manufacturing method thereof. The artificial jade is prepared from the following raw materials in percentage by weight: 15-21 wt% of sodium carbonate, 25-30 wt% of aluminum oxide, 49-60 wt% of silicon dioxide, 3-4 wt% of calcium fluoride and 0.1-1 wt% of chromium oxide, wherein the sum of the weight percentages of the components is 100%. The artificial jade is synthesized from pure natural inorganic materials, does not volatilize organic matters harmful to human bodies, has the advantages of cheap raw materials, low production cost, high temperature resistance, acid and alkali resistance and heavy specific gravity in the aspects of material and performance, and simultaneously, the artificial jade takes sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium sesquioxide as raw materials, so that the artificial jade is environment-friendly and energy-saving. The jadeite is prepared by solid-phase sintering, and the artificial jadeite jade obtained after cooling has jadeite green textures or clouds or clouds inside, is exactly like natural jadeite jade and can be used for preparing handicrafts, jewelry, ornaments and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of artificial microcrystalline stone materials, and in particular relates to an artificial jadeite and a manufacturing method thereof. Background Art

[0002] At present, the jade used in artificial jewelry and craft ornaments is divided into natural jade and artificially synthesized jade. Natural jade is very expensive, while artificially synthesized jade is mostly made of resin bonding, and its main disadvantages are that it is not resistant to high temperatures, has poor corrosion resistance, low hardness, and light specific gravity. Summary of the invention

[0003] In view of this, the present invention aims to propose an artificial jadeite, which is synthesized from pure natural inorganic materials, does not volatilize organic matter harmful to the human body, and has cheap raw materials and low production costs. In terms of material and performance, it has the characteristics of high temperature resistance, acid and alkali resistance, and high specific gravity.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An artificial jadeite is made of the following raw materials in weight percentage: 15-21wt% of sodium carbonate, 25-30wt% of aluminum oxide, 49-60wt% of silicon dioxide, 3-4wt% of calcium fluoride, and 0.1-1wt% of chromium oxide, wherein the sum of the weight percentages of the components is 100%.

[0006] Preferably, the artificial jade has jade green textures and / or clouds inside, making the distinguishing features of the prepared artificial jade more obvious.

[0007] Preferably, the artificial jade is mainly used to make handicrafts and decorations, so that the use range of the artificial jade is wider.

[0008] Preferably, the artificial jade is preferably made of raw materials including the following parts by weight: 16-18wt% sodium carbonate, 26-28wt% aluminum oxide, 52-58wt% silicon dioxide, 3.2-3.8wt% calcium fluoride, and 0.4-0.8wt% chromium oxide.

[0009] Preferably, the artificial jade is preferably made of raw materials including the following parts by weight: 16.5-17wt% sodium carbonate, 26-27wt% aluminum oxide, 54-56wt% silicon dioxide, 3.4-3.6wt% calcium fluoride, and 0.5-0.6wt% chromium oxide.

[0010] The method for preparing the artificial jadeite comprises the following steps:

[0011] Step (1): adding sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide into a suitable ball mill according to a preferred ratio, and then adding zirconium oxide beads and anhydrous ethanol as ball milling media for ball milling;

[0012] Step (2): heating the ball-milled sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide until completely dry;

[0013] Step (3): Grinding the dried bulk raw material thoroughly to crush the bulk raw material into fine powder;

[0014] Step (4): weigh an appropriate amount of ground raw materials, calcine and heat to 1350°C, keep warm for 180 minutes, cool with the furnace after the heat preservation, wait for the temperature in the furnace to drop to 650°C, keep warm for 120 minutes for nucleation, heat to 820°C after the heat preservation, keep warm for 120 minutes for crystallization; finally cool naturally to room temperature and take out to obtain the finished product.

[0015] Preferably, the heating rate of the first heating in step (4) is 5°C / min, and the heating rate of the second heating in step (4) is also 5°C / min. By strictly controlling the heating rate, the stability of the performance of the artificial jade after manufacturing is ensured.

[0016] Compared with the prior art, the artificial jadeite of the present invention has the following advantages:

[0017] 1. The artificial jadeite of the present invention is synthesized from pure natural inorganic materials, will not volatilize organic matter harmful to the human body, and has cheap raw materials and low production costs. In terms of material and performance, it has high temperature resistance, acid and alkali resistance, and high specific gravity, with a specific gravity of 2.7-3.6g / cm 3 , refractive index reaches 1.55-1.75, Mohs hardness reaches 6-7, and compressive strength reaches 190-200Mpa;

[0018] 2. Artificial jade is made from sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride, and chromium oxide. It is prepared by solid-phase sintering. After cooling, the artificial jade has jade green textures or clouds inside, which resembles natural jade. It can be used to make handicrafts, jewelry, decorations, etc. DETAILED DESCRIPTION

[0019] Unless otherwise defined, the technical terms used in the following embodiments have the same meanings as commonly understood by those skilled in the art to which the present invention belongs.

[0020] The present invention is described in detail below.

[0021] An artificial jadeite is made of the following raw materials in weight percentage: 15-21wt% of sodium carbonate, 25-30wt% of aluminum oxide, 49-60wt% of silicon dioxide, 3-4wt% of calcium fluoride, and 0.1-1wt% of chromium oxide, wherein the sum of the weight percentages of the components is 100%.

[0022] In this embodiment, the artificial jade has jade green textures and / or clouds inside, making the distinguishing features of the prepared artificial jade more obvious.

[0023] In this embodiment, the artificial jade is mainly used to make handicrafts and decorations, so that the use range of the artificial jade is wider.

[0024] In this embodiment, the artificial jade is made of raw materials including the following parts by weight: 16-18wt% sodium carbonate, 26-28wt% aluminum oxide, 52-58wt% silicon dioxide, 3.2-3.8wt% calcium fluoride, and 0.4-0.8wt% chromium oxide.

[0025] In this embodiment, the artificial jade is made of raw materials including the following parts by weight: 16.5-17wt% sodium carbonate, 26-27wt% aluminum oxide, 54-56wt% silicon dioxide, 3.4-3.6wt% calcium fluoride, and 0.5-0.6wt% chromium oxide.

[0026] The method for preparing the artificial jadeite comprises the following steps:

[0027] Step (1): adding sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide into a suitable ball mill according to a preferred ratio, and then adding zirconium oxide beads and anhydrous ethanol as ball milling media for ball milling;

[0028] Step (2): heating the ball-milled sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide until completely dry;

[0029] Step (3): Grinding the dried bulk raw material thoroughly to crush the bulk raw material into fine powder;

[0030] Step (4): weigh an appropriate amount of ground raw materials, calcine and heat to 1350°C, keep warm for 180 minutes, cool with the furnace after the heat preservation, wait for the temperature in the furnace to drop to 650°C, keep warm for 120 minutes for nucleation, heat to 820°C after the heat preservation, keep warm for 120 minutes for crystallization; finally cool naturally to room temperature and take out to obtain the finished product.

[0031] In this embodiment, the heating rate of the first heating in step (4) is 5°C / min, and the heating rate of the second heating in step (4) is also 5°C / min. By strictly controlling the heating rate, the stability of the performance of the artificial jade after manufacturing is ensured.

[0032] The artificial jadeite of the present invention is further described below in conjunction with specific embodiments:

[0033] Example 1

[0034] Sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide having the composition shown in the following table are mixed and ball-milled, dried and ground.

[0035] Components Content (weight %) <![CDATA[Na2CO3]]> 21.7 <![CDATA[Al2O3]]> 25 <![CDATA[SiO2]]> 49.2 CaF 3.7 <![CDATA[Gr2O3]]> 0.2

[0036] Put the raw material in a mold, heat it to 1350℃ at a heating rate of 5℃ / min, keep it warm for 180min, cool it with the furnace after the insulation, wait for the temperature in the furnace to drop to 650℃, keep it warm for 120min for nucleation, heat it to 820℃ at a heating rate of 5℃ / min after the insulation, keep it warm for 120min for crystallization; finally cool it naturally to room temperature and take it out to get the finished product.

[0037] The specific gravity of artificial jadeite is 3.2g / cm 3 , the refractive index is 1.55, the Mohs hardness is 6.4, and the compressive strength is 190Mpa.

[0038] The artificial jade is artificially carved into shape, polished and waxed to become jewelry, handicrafts, etc.

[0039] Example 2

[0040] Sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide having the composition shown in the following table are mixed and ball-milled, dried and ground.

[0041] Components Content (weight %) <![CDATA[Na2CO3]]> 21.7 <![CDATA[Al2O3]]> 25 <![CDATA[SiO2]]> 49.2 CaF 3.7 <![CDATA[Gr2O3]]> 0.3

[0042] Put the raw material in a mold, heat it to 1350℃ at a heating rate of 5℃ / min, keep it warm for 180min, cool it with the furnace after the insulation, wait for the temperature in the furnace to drop to 650℃, keep it warm for 120min for nucleation, heat it to 820℃ at a heating rate of 5℃ / min after the insulation, keep it warm for 120min for crystallization; finally cool it naturally to room temperature and take it out to get the finished product.

[0043] The specific gravity of artificial jadeite is 3.2g / cm 3 , the refractive index is 1.56, the Mohs hardness is 6.4, and the compressive strength is 190Mpa.

[0044] The artificial jadeite is artificially carved into shape, polished and waxed to become jewelry, handicrafts, etc.

[0045] Example 3

[0046] Sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide having the composition shown in the following table are mixed and ball-milled, dried and ground.

[0047]

[0048]

[0049] Put the raw material in a mold, heat it to 1350℃ at a heating rate of 5℃ / min, keep it warm for 180min, cool it with the furnace after the insulation, wait for the temperature in the furnace to drop to 650℃, keep it warm for 120min for nucleation, heat it to 820℃ at a heating rate of 5℃ / min after the insulation, keep it warm for 120min for crystallization; finally cool it naturally to room temperature and take it out to get the finished product.

[0050] The specific gravity of artificial jadeite is 3.3g / cm 3 , the refractive index is 1.52, the Mohs hardness is 6.4, and the compressive strength is 190Mpa.

[0051] The artificial jade is artificially carved into shape, polished and waxed to become jewelry, handicrafts, etc.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An artificial jadeite, characterized in that: The artificial jade is made of the following raw materials in percentage by weight: 15-21 wt% of sodium carbonate, 25-30 wt% of aluminum oxide, 49-60 wt% of silicon dioxide, 3-4 wt% of calcium fluoride, and 0.1-1 wt% of chromium oxide, wherein the sum of the percentages by weight of each component is 100%.

2. The artificial jadeite according to claim 1, characterized in that: The artificial jadeite has jadeite green textures and / or clouds inside.

3. The artificial jadeite according to claim 1, characterized in that: The artificial jade is mainly used to make handicrafts and decorations.

4. The artificial jadeite according to claim 1, characterized in that: The artificial jade is preferably made of the following raw materials in parts by weight: 16-18wt% sodium carbonate, 26-28wt% aluminum oxide, 52-58wt% silicon dioxide, 3.2-3.8wt% calcium fluoride, and 0.4-0.8wt% chromium oxide.

5. The artificial jadeite according to claim 1, characterized in that: The artificial jade is preferably made of the following raw materials in parts by weight: 16.5-17 wt% sodium carbonate, 26-27 wt% aluminum oxide, 54-56 wt% silicon dioxide, 3.4-3.6 wt% calcium fluoride, and 0.5-0.6 wt% chromium oxide.

6. A method for preparing an artificial jadeite according to any one of claims 1 to 5, characterized in that: The steps include: Step (1): adding sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide into a suitable ball mill according to a preferred ratio, and then adding zirconium oxide beads and anhydrous ethanol as ball milling media for ball milling; Step (2): heating the ball-milled sodium carbonate, aluminum oxide, silicon dioxide, calcium fluoride and chromium oxide until completely dry; Step (3): Grinding the dried bulk raw material thoroughly to crush the bulk raw material into fine powder; Step (4): weigh an appropriate amount of ground raw materials, calcine and heat to 1350°C, keep warm for 180 minutes, cool with the furnace after the heat preservation, wait for the temperature in the furnace to drop to 650°C, keep warm for 120 minutes for nucleation, heat to 820°C after the heat preservation, keep warm for 120 minutes for crystallization; finally cool naturally to room temperature and take out to obtain the finished product.

7. The method for preparing an artificial jadeite according to claim 6, characterized in that: The heating rate of the first heating in step (4) is 5°C / min, and the heating rate of the second heating in step (4) is also 5°C / min.

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