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Saint-Gobain Boron Nitride Powder Solutions

 

saint-gobain boron nitride powder solutions

Functional Fillers and Additives to Enable High Performance Solutions in Demanding Applications

Saint-Gobain Boron Nitride Powder Solutions merge the key properties of hexagonal boron nitride (hBN) and over 60 years of manufacturing expertise to offer a complete portfolio of hBN powders. With a varietry of particle shapes and sizes available, Saint-Gobain Boron Nitride Powder Solutions enable our customers to maximize the benefits of boron nitride in a wide array of markets and applications.

Commonly referred to as "white graphite," hBN crystals naturally form into platelets with a roughly hexagonal shape. While widely known as a high performance dielectric cooling filler, hBN powders add value to many different industries. Learn more about our product offering below!

Our Particle Offering

boron nitride platelet powder SEM micrograph

Platelet Particles

Average diameter from 1 µm to 30 µm

Due to its lamellar crystal structure, the simplest form of hBN particles are platelets. Three classes of platelet powders are included in the Saint-Gobain Boron Nitride Powder Solutions portfolio to provide a balance of form and function. The platelet powders available are split into three categories: Standard Platelets (SP), Modified Platelets (MP), and Flowable Platelets (FP).

Platelets provide the best value for as additives for systems that require fine particles or high shear mixing operations. They are also the best option for lubrication enhancement

boron nitride spherical agglomerate powder SEM micrograph

Engineered Agglomerates

Average diameter from 35 µm to 350 µm

In many cases, the high aspect ratio and surface area of BN platelets can pose processing challenges. Saint-Gobain Boron Nitride Powder Solutions offers a range of engineered agglomerated powders with varied size, shape and density to maximize value. Two classes of engineered agglomerates are available: Spherical Agglomerates (SA) and High Density Agglomerates (HD).

A major benefit for using agglomerated powders is the ability to obtain more isotropic properties as compared to platelets. They also improve processing and handling due to improved flowability and overall particle packing.

 

 

 

 

 

Standard Platelets

Standard Platelet or "SP" powders are high purity single crystals of BN with no agglomeration and tight size distribution around the D50. The product names include "SP" followed by the d50 average particle size for that grade. 

boron nitride platelet powder SEM micrograph

SP1

Our finest platelet option, ideal for applications with max particle size constraints.

boron nitride platelet powder SEM micrograph

SP2

SP2 offers slightly higher crystallinity and purity compared to SP1, for applications with strict purity and size requirements.

boron nitride platelet powder SEM micrograph

SP5

Uniquely processed for tight size distribution, SP5 is a popular grade in a variety of applications.

boron nitride platelet powder SEM micrograph

SP6

Close in size to SP5, SP6 is further processed for high purity, making it ideal for cosmetic or demanding dielectric applications. 

boron nitride platelet powder SEM micrograph

SP8

A mid-size platelet powder with lower surface area than finer grades, enabling lower mix viscosities at similar loading levels. 

boron nitride platelet powder SEM micrograph

SP12

A mid-size platelet powder with lower surface area than finer grades, enabling lower mix viscosities at similar loading levels. 

boron nitride platelet powder SEM micrograph

SP16

A larger platelet with high thermal performance and good processability.

boron nitride platelet powder SEM micrograph

SP30

Our highest purity and largest platelet powder, SP30 provides the best thermal performance in applications that can accomodate larger particles.

Typical properties, not to be used as product specification
Grade D10 D50 D90 Tap Density Surface Area BN Content B2O3 O2
  µm µm µm g/cm3 m2/g % % %
SP1 0.3 1.2 3.5 0.20 18 98.2 0.15 1.7
SP2 0.6 2.2 4.2 0.20 12 98.6 0.06 1.3
SP5 3.3 5.5 10 0.30 9.0 99.3 0.10 0.6
SP6 3.9 6.5 12 0.45 8.0 99.6 0.04 0.4
SP8 4.2 8.5 19 0.45 2.8 99.3 0.02 0.7
SP12 6.0 12 23 0.50 1.8 99.3 0.02 0.7
SP16 7.4 16 29 0.50 1.6 99.4 0.02 0.6
SP30 14 30 50 0.55 1.1 99.7 0.02 0.3

Modified Platelets

Modified Platelet or "MP" powders are unique grades with a range of purity levels and level of agglomeration. MP50 and MP20 are both made up of submicron BN particles, while MP05 has high purity and larger primary platelets.  

 

boron nitride platelet powder SEM micrograph

MP50

Tightly agglomerated submicron platelets with oxygen content around 5%, ideal for improved bonding in composite systems or powder metal formulations. 

boron nitride platelet powder SEM micrograph

MP20

Agglomerated submicron platelets with higher purity compared to MP50, at oxygen content of 2%. 

boron nitride platelet powder SEM micrograph

MP05

A fully crystalline, high purity platelet further processed to achieve a denser, slightly agglomerated powder.

Typical properties, not to be used as product specification
Grade D10 D50 D90 Tap Density Surface Area BN Content B2O3 O2
  µm µm µm g/cm3 m2/g % % %
MP50 0.6 3.3 20 0.60 40 95.0 0.90 4.8
MP20 1.0 5.4 20 0.55 40 98.0 0.40 1.7
MP05 4.4 10 20 0.65 15 99.2 0.30 0.7

Flowable Platelets

Flowable Platelet of "FP" powders are loosely agglomerated into large particles to allow for improved flowability during dry handling, but break down during processing to their primary platelet particles. FP30 is made up of 30 µm platelets and includes a calcium-containing binder phase, ideal for applications without stringent purity requirements that are cost-sensitive. FP12 is a higher purity option, with 12 µm primary platelets.

Typical properties, not to be used as product specification
Grade D10 D50 D90 Tap Density Surface Area BN Content B2O3 O2
  µm µm µm g/cm3 m2/g % % %
FP12 100 400 800 0.75 14 99.3 0.07 0.6
FP30 100 400 800 1.00 1.2 95.5 0.09 2.7

Spherical Agglomerates

Spherical Agglomerate or "SA" powders that, like Standard Platelets, are named based on the median particle size. SA powders provide excellent flowability and particle packing due to their spherical shape. With four size options ranging from 35 µm to 300 µm, many different systems can be accomodated.

boron nitride platelet powder SEM micrograph

SA35

Our finest spherical particle, ideal for applications that benefit from isotropic properties but have limitations on maximum particle size.

boron nitride platelet powder SEM micrograph

SA75

A medium-fine particle that can be blended to optimize particle packing or used on its own.

boron nitride platelet powder SEM micrograph

SA125

A medium-coarse spherical with optimal isotropic thermal conductivity when used as a cooling filler. 

boron nitride platelet powder SEM micrograph

SA300

A coarse powder ideal for bridging large thicknesses in composite systems. 

Typical properties, not to be used as product specification
Grade D10 D50 D90 Tap Density Surface Area BN Content B2O3 O2
  µm µm µm g/cm3 m2/g % % %
SA35

20

 35 55 0.5 4.2 99.5 0.03 0.3
SA75 55 75 105 0.5 4.0 99.5 0.03 0.3
SA125 95 130 185 0.45 3.9 99.5 0.03 0.3
SA300 200 3.15 500 0.40 2.8 99.5 0.02 0.3

High Density Agglomerates

Hgh Density Agglomerate or "HD" powders are strong, blocky-shaped agglomerates that are more tightly agglomerated than SA grades, making them more resistant to breaking down during processing. For cooling fillers, these grades provide the best through-plane thermal conductivity that will not degrade during processing or dispensing. With sizes ranging from 75 µm to 250 µm, these grades are best suited for applications that can accomodate coarse powder sizes.

boron nitride platelet powder SEM micrograph

HD75

boron nitride platelet powder SEM micrograph

HD150

boron nitride platelet powder SEM micrograph

HD200

Typical properties, not to be used as product specification
Grade D10 D50 D90 Tap Density Surface Area BN Content B2O3 O2
  µm µm µm g/cm3 m2/g % % %
HD75 40 80 110 0.75 2.6 99.7 0.02 0.3
HD125 60 120 200 0.80 2.4 99.8 0.02 0.2
HD200 110 180 250 0.75 2.7 99.8 0.02 0.2

Related Documents

 Saint-Gobain Boron Nitride Powder Solutions (Brochure)
 BN Powders 01 (Safety Data Sheet)
 BN Powders 02 (Safety Data Sheet)

粉末常见问题

简单来说，六方氮化硼hBN与石墨非常相似。 它是BN多晶型物中最稳定和最柔软的，因此可用作填充剂，润滑剂和化妆品的添加剂。 立方氮化硼cBN具有与金刚石相似的晶体结构，是仅次于金刚石的第二硬的已知材料。

圣戈班不提供cBN。

PBN是一种通过化学气相沉积工艺直接制成在基材表面上的六方氮化硼产品。

圣戈班不提供PBN。

低密度BN粉末的振实密度通常小于0.5克/立方厘米。 高密度BN粉末的振实密度通常高于0.6克/立方厘米。

在低密度附聚物中，BN片状晶体通过随机互锁的片状晶体松散地保持在一起。 这些附聚物是软的并且在最小的剪切力的作用下分解。

在高密度附聚物中，BN片状晶体紧密堆叠在一起。 这些团聚体比低密度团聚体更“强韧”且更难以破碎。  

需要有足够的填料来产生良好的粒子间接触，而不仅仅是浮在非导电聚合物基体中的BN粒子。

选择氮化硼牌号以提高导热性通常取决于3个关键因素 –

  1. 您的树脂系统的粒度公差（或粘合线厚度BLT）
  2. 所需的导热系数改善平面（平面内或贯通平面）
  3. 采用混合/分散工艺（高剪切或低/中剪切）

您应确保最大粒径不超过最终产品的期望厚度或横截面。 配方设计师通常会混合多种尺寸分布，以更好地填充BN颗粒，并在树脂基体中获得最佳的渗透强度。

片状晶体倾向于沿树脂流动方向排列，并且由于其固有的各向异性，因此具有非常好的面内导热性。 片状晶体还允许将BN添加到需要非常薄的层或粘合线的系统中，而该层或粘合线太大而无法添加团聚物。

团聚体和球形牌号-小的BN片状晶体像雪球一样在各个方向随机定向-克服了这一限制，使BN成为适合平面内和平面内导热率提高的各向同性填料。

了解更多

片状晶体等级是单晶BN颗粒，虽然很小，但很坚固，在高剪切力下不会分解。 片状晶体等级适用于高剪切操作，例如双螺杆混合和挤出。

另一方面，球形和附聚牌号由多个小的氮化硼小片组成，它们通过互锁的平面保持在一起，而无需添加任何粘合剂系统。 这使得这些牌号在承受高剪切力时特别容易破碎。 这些牌号适用于行星搅拌机等中低剪切混合作业。

氮化硼是白色，无毒，稳定且惰性的。 它在最高约900°C的温度下仍具有抗氧化性（不同于在500°C以下氧化的石墨）。氮化硼的润滑性保持在500°C以上，这是石墨在空气中作为固体润滑剂的极限温度。氮化硼还可在惰性或真空条件下保持润滑性。

另外，氮化硼具有低介电常数，使其成为绝缘，保护和低介电损耗的理想材料。

TrèsBN®粉末是BN的层状形式，类似于石墨。 每个粉末颗粒都是由许多层组成的薄片。 每一层是共价键合的硼原子和氮原子呈六边形图案的平面。 尽管各层之间的结合力很强，但将这些层保持在一起的力（称为范德华力）却非常弱，当摩擦或剪切片状晶体并使层分开时，会产生柔软而润滑的效果。

此外，高纯度TRÈSBN晶体的表面不含碳和其他杂质，因此没有“拖拉”或发粘的感觉。

关键区别在于粒径和晶体形态。 所有等级均为高纯度，并通过了全球重金属法规。 平均直径范围从2到30微米不等，外观也会发生变化，从2微米颗粒的亚光白色外观变为30微米粉末的更半透明或发亮的外观。

从片状晶体表面观察时，高纯度六角形BN的单个片状晶体看起来是透明的。 在较大的片状晶体上，这可以看作是较大的小面上的“火花”。 大多数细筛网的BN粉末形成团块，如果不分散，则呈白色且不透明。

配方中TrèsBN®填料的量完全取决于配方师，应用和所需的结果。 TRÈSBN通常以3 – 10％的比例添加到化妆品配方中。

从我们建议的配方中了解更多信息。

氮化硼粉末的标准包装为25千克纸板箱或铁桶包装。 根据等级，我们的生产批量可能在250磅 到1200磅之间。