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A kind of thermostat ceramic material and preparation method thereof

A ceramic material and temperature controller technology, applied in the field of ceramic processing, can solve the problems of low impact resistance, brittleness, and high brittleness of alumina ceramics, and achieve the effects of improving strength and toughness, increasing density, and reducing filler gaps.

Active Publication Date: 2022-06-28
新化县顺达电子陶瓷有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

During the use of the thermostat, it is required to have high compressive strength, good heat insulation, and excellent insulation performance, but the thermal conductivity of alumina ceramics is relatively high (the thermal conductivity of pure alumina ceramics is greater than 20W / (m K)), resulting in poor thermal insulation performance of thermostat ceramics; and alumina ceramics are brittle, low in impact resistance, and brittle, which affects their use in thermostats Effect
The ceramic part of the thermostat is directly in contact with the metal temperature sensing piece. The metal temperature sensing piece will deform to the front and back sides with the change of the ambient temperature, which will cause friction between the metal temperature sensing piece and the ceramic part, which is easy to wear and tear. Affect the service life of the thermostat, therefore, the ceramic material of the thermostat needs to have excellent wear resistance

Method used

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  • A kind of thermostat ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation process of the temperature controller ceramic material of the present embodiment includes the following steps:

[0039] P1.α-Al 2 O 3 Surface modification of micropowder: 800g α-Al 2 O 3 The micropowder and 16 g of bis(triethanolamine) diisopropyl titanate were added to 2 L of toluene solvent and mixed, stirred at 80 °C for 6 h, cooled to room temperature, and the mixture was filtered, and the filter cake was quickly washed with toluene 3 times to remove residues titanate coupling agent composition, the product was dried in a vacuum oven to obtain a surface-modified α-Al 2 O 3 Micropowder.

[0040] P2.MgO-Al 2 O 3 - Surface modification of CaO glass powder: 50g MgO-Al 2 O 3 -CaO glass frit and 4g of 3-(2,3-glycidoxy)propyltrimethoxysilane were added to 500mL of toluene solvent and mixed, stirred at 100°C for 4h, cooled to room temperature, filtered the mixture, and the filter cake was Quickly washed 3 times with toluene to remove residual silan...

Embodiment 2

[0050] The preparation process of the temperature controller ceramic material of the present embodiment includes the following steps:

[0051] P1.α-Al 2 O 3 Surface modification of micropowder: 900g α-Al 2 O 3 The micropowder and 36g of bis(triethanolamine) diisopropyl titanate were added to 2L of toluene solvent and mixed, stirred at 90°C for 4h, filtered, washed and dried to obtain surface-modified α-Al 2 O 3 Micropowder.

[0052] P2.MgO-Al 2 O 3 - Surface modification of CaO glass powder: 30g MgO-Al 2 O 3 -CaO glass frit and 1.5g of 3-(2,3-glycidoxy)propyltrimethoxysilane were added to 500mL of toluene solvent and mixed, stirred at 110°C for 3h, filtered, washed and dried to obtain silane modification MgO-Al 2 O 3 -CaO glass powder.

[0053] P3. Premixing: the surface-modified α-Al prepared 2 O 3 Micropowder and Silane Modified MgO-Al 2 O 3 -CaO glass powder was fully mixed in 5L of toluene solvent, then 108g of tributylamine was added, reacted at 120°C for ...

Embodiment 3

[0060] The preparation process of the temperature controller ceramic material of the present embodiment includes the following steps:

[0061] P1.α-Al 2 O 3 Surface modification of micropowder: 850g α-Al 2 O 3 Micropowder and 25g of bis(triethanolamine) diisopropyl titanate were added to 2L of toluene solvent and mixed, stirred at 85°C for 5h, filtered, washed and dried to obtain surface-modified α-Al 2 O 3 Micropowder.

[0062] P2.MgO-Al 2 O 3 - Surface modification of CaO glass powder: 40g MgO-Al 2 O 3 -CaO glass frit and 2.4g of 3-(2,3-glycidoxy)propyltrimethoxysilane were added to 500mL of toluene solvent and mixed, stirred at 100°C for 4h, filtered, washed and dried to obtain silane modification MgO-Al 2 O 3 -CaO glass powder.

[0063] P3. Premixing: the surface-modified α-Al prepared 2 O 3 Micropowder and Silane Modified MgO-Al 2 O 3 -CaO glass powder was fully mixed in 5L of toluene solvent, then 85g of tributylamine was added, reacted for 5h at 110°C un...

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Abstract

The invention discloses a thermostat ceramic material and a preparation process thereof, and relates to the technical field of ceramic material processing. The thermostat ceramic material disclosed by the invention is prepared from the following raw materials in parts by weight: α-Al 2 o 3 80-90 parts of fine powder, 5-10 parts of γ-alumina, MgO-Al 2 o 3 ‑3-5 parts of CaO glass powder, 2-5 parts of silicon oxide, 2-3 parts of binder and 1.5-2 parts of dispersant; the preparation process is: α‑Al 2 o 3 Micronized powder and MgO‑Al 2 o 3 ‑The surface of the CaO glass powder is modified with a coupling agent, then mixed and reacted to obtain a pre-mixture; then mixed and ground with other components of the ceramic material to obtain a slurry; granulated and sintered. The invention provides a thermostat ceramic material, which is mainly used on the thermostat housing, supporting parts and transmission parts, has high mechanical strength, compressive strength and insulation resistance, and has low thermal conductivity and Excellent wear resistance ensures the safe use of the thermostat and greatly prolongs the service life of the thermostat.

Description

technical field [0001] The invention belongs to the technical field of ceramic processing, and in particular relates to a temperature controller ceramic material and a preparation method thereof. Background technique [0002] Thermostat refers to a series of automatic control elements that undergo physical deformation inside the switch according to the temperature change of the working environment, thereby producing some special effects and generating on or off actions, also called temperature control switches, temperature protectors, The temperature controller is mainly used to control the operation of the equipment to achieve the ideal temperature and energy saving effect. Initially, due to the relatively backward manufacturing process of ceramics, the shell and supports of the thermostat used to fix and support the temperature controller (such as metal components, etc.) are made of plastic products. Electrical products have great safety hazards. In the 1990s, Germany beg...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/3418C04B2235/36C04B2235/6567C04B2235/6562C04B2235/661C04B2235/77C04B2235/96C04B2235/9607
Inventor 李国文
Owner 新化县顺达电子陶瓷有限公司
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