成分：石膏粉主要成分為硫酸鈣（CaSO4）和水（H2O），根據物理成分和顏色的不同，可以分為多種類型，如磷石膏粉、脫硫石膏粉、檸檬酸石膏粉、氟石膏粉等。

Ingredients: Gypsum powder is mainly composed of calcium sulfate (CaSO4) and water (H2O). According to its physical composition and color, it can be divided into various types, such as phosphogypsum powder, desulfurization gypsum powder, citric acid gypsum powder, fluorogypsum powder, etc.

分類：石膏粉可以根據物理特征和用途進行分類，包括白云質石膏粉、粘土質石膏粉、綠泥石石膏粉、雪花石膏粉、滑石石膏粉、含砂質石膏粉和纖維石膏粉等。

Classification: Gypsum powder can be classified according to its physical characteristics and uses, including dolomite gypsum powder, clay gypsum powder, chlorite gypsum powder, snowflake gypsum powder, talc gypsum powder, sandy gypsum powder, and fiber gypsum powder.

用途：

Purpose:

建筑領域：石膏粉用于建筑裝修中的石膏板制作，具有輕、耐火、隔聲、隔熱等特點。也用于墻體找平、陰陽角調直等基層處理，以及制作石膏水泥等。

In the field of architecture, gypsum powder is used for the production of gypsum boards in building decoration, which has the characteristics of light weight, fire resistance, sound insulation, and thermal insulation. It is also used for base treatment such as wall leveling, internal and external corner straightening, as well as for making gypsum cement, etc.

化工領域：石膏粉用于生產硫酸、硫酸銨，以及作為密封膠的填充劑或用于配置無機膠黏劑。

In the field of chemical engineering, gypsum powder is used for the production of sulfuric acid, ammonium sulfate, as a filler for sealants, or for the preparation of inorganic adhesives.

農業：石膏粉用于改良土壤，調節酸堿度，適用于鹽堿地、紅土地等土壤的改良，以及作為食用菌栽培上的鈣、硫復合礦物肥料。

Agriculture: Gypsum powder is used to improve soil, regulate acidity and alkalinity, and is suitable for improving soils such as saline alkali and red soil. It is also used as a calcium and sulfur composite mineral fertilizer for edible mushroom cultivation.

食品加工：食用級石膏粉用作營養增補劑（鈣質強化）、凝固劑、酵母食料、面團調節劑、螯合劑，還用作番茄、土豆罐頭中的組織強化劑。

Food processing: Edible grade gypsum powder is used as a nutritional supplement (calcium fortifier), coagulant, yeast feed, dough conditioner, chelating agent, and also as a tissue fortifier in canned tomatoes and potatoes.

醫療領域：石膏粉用于護理和外科治療，支撐和固定患者的骨骼和軟組織，減輕病人的疼痛.

Medical field: Gypsum powder is used for nursing and surgical treatment, supporting and fixing patients' bones and soft tissues, and reducing patients' pain

特性：

characteristic:

物理特性：石膏粉的莫氏硬度為1.5~2，微溶于水，溶于酸、銨鹽、硫代硫酸鈉和甘油。

Physical properties: The Mohs hardness of gypsum powder is 1.5~2, slightly soluble in water, soluble in acids, ammonium salts, sodium thiosulfate, and glycerol.

熱穩定性：加熱至150℃時失去1.5H2O而成半水物(熟石膏)，繼續加熱至163℃失去全部結晶水變成無水物。

Thermal stability: When heated to 150 ℃, it loses 1.5H2O and becomes a semi hydrated substance (gypsum), and when further heated to 163 ℃, it loses all crystalline water and becomes anhydrous.

隔音隔熱防火性能：石膏及其制品的微孔結構和加熱脫水性，使之具優良的隔音、隔熱和防火性能。

Sound insulation, heat insulation, and fire resistance performance: The microporous structure and heating dehydration properties of gypsum and its products endow them with excellent sound insulation, heat insulation, and fire resistance performance.

安全性：石膏粉無毒，使用時需注意防潮、防濕，并應貯存于干燥、潔凈的庫房中。

Safety: Gypsum powder is non-toxic. When using it, attention should be paid to moisture and humidity prevention, and it should be stored in a dry and clean warehouse.

以上是石膏粉的一些基本知識，其應用范圍廣泛，從建筑到化工，再到農業和食品加工等多個領域都有涉及。

The above are some basic knowledge of gypsum powder, which has a wide range of applications from construction to chemical industry, as well as agriculture and food processing.

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